/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=NARROWEST --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 -i ../../../trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:15:36,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:15:36,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:15:36,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:15:36,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:15:36,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:15:36,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:15:36,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:15:36,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:15:36,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:15:36,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:15:36,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:15:36,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:15:36,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:15:36,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:15:36,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:15:36,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:15:36,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:15:36,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:15:36,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:15:36,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:15:36,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:15:36,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:15:36,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:15:36,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:15:36,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:15:36,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:15:36,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:15:36,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:15:36,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:15:36,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:15:36,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:15:36,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:15:36,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:15:36,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:15:36,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:15:36,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:15:36,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:15:36,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:15:36,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:15:36,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:15:36,214 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 [2020-10-13 10:15:36,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:15:36,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:15:36,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:15:36,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:15:36,251 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:15:36,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:15:36,251 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:15:36,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:15:36,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:15:36,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:15:36,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:15:36,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:15:36,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:15:36,253 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:15:36,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:15:36,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:15:36,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:15:36,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:15:36,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:15:36,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:15:36,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:15:36,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:15:36,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:15:36,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:15:36,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:15:36,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:15:36,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:15:36,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:15:36,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:15:36,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:15:36,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:15:36,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:15:36,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:15:36,632 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:15:36,633 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:15:36,634 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c [2020-10-13 10:15:36,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48fbf4dde/4637ffc915da42238ab5dead4b8aa936/FLAG75321e4a8 [2020-10-13 10:15:37,138 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:15:37,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c [2020-10-13 10:15:37,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48fbf4dde/4637ffc915da42238ab5dead4b8aa936/FLAG75321e4a8 [2020-10-13 10:15:37,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48fbf4dde/4637ffc915da42238ab5dead4b8aa936 [2020-10-13 10:15:37,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:15:37,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:15:37,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:37,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:15:37,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:15:37,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:37,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3336fb4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37, skipping insertion in model container [2020-10-13 10:15:37,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:37,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:15:37,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:15:37,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:37,853 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:15:37,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:37,936 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:15:37,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37 WrapperNode [2020-10-13 10:15:37,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:37,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:15:37,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:15:37,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:15:38,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (1/1) ... [2020-10-13 10:15:38,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:15:38,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:15:38,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:15:38,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:15:38,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (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 [2020-10-13 10:15:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:15:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:15:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:15:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:15:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:15:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-13 10:15:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure inv [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-13 10:15:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:15:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:15:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-13 10:15:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:15:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:15:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:15:38,487 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:15:38,487 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 10:15:38,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:38 BoogieIcfgContainer [2020-10-13 10:15:38,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:15:38,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:15:38,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:15:38,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:15:38,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:15:37" (1/3) ... [2020-10-13 10:15:38,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8c1b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:38, skipping insertion in model container [2020-10-13 10:15:38,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:37" (2/3) ... [2020-10-13 10:15:38,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8c1b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:38, skipping insertion in model container [2020-10-13 10:15:38,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:38" (3/3) ... [2020-10-13 10:15:38,499 INFO L109 eAbstractionObserver]: Analyzing ICFG inv_Newton.c.p+cfa-reducer.c [2020-10-13 10:15:38,510 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:15:38,517 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:15:38,530 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:15:38,554 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:15:38,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:15:38,554 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:15:38,554 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:15:38,555 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:15:38,555 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:15:38,555 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:15:38,555 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:15:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-13 10:15:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:15:38,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:38,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:38,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:38,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1305214181, now seen corresponding path program 1 times [2020-10-13 10:15:38,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:38,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703680873] [2020-10-13 10:15:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:38,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:38,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:39,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:15:39,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:15:39,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-13 10:15:39,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:39,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:15:39,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:15:39,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:15:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:15:39,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:39,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:39,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:39,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:39,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:15:39,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:39,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:39,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:15:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:39,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703680873] [2020-10-13 10:15:39,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:39,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:15:39,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874762818] [2020-10-13 10:15:39,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:15:39,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:15:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:15:39,239 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2020-10-13 10:15:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:39,351 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-13 10:15:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:15:39,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 10:15:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:39,363 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:15:39,363 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:15:39,367 INFO L675 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 [2020-10-13 10:15:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:15:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-10-13 10:15:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:15:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-10-13 10:15:39,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2020-10-13 10:15:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:39,412 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-10-13 10:15:39,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:15:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-10-13 10:15:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:15:39,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:39,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:39,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:15:39,414 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1632918976, now seen corresponding path program 1 times [2020-10-13 10:15:39,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:39,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775197699] [2020-10-13 10:15:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:39,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:15:39,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:15:39,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-13 10:15:39,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:15:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:15:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:15:39,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:39,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:39,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:39,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:15:39,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:39,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:15:39,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775197699] [2020-10-13 10:15:39,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:39,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:15:39,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320230879] [2020-10-13 10:15:39,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:15:39,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:39,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:15:39,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:15:39,836 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2020-10-13 10:15:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:39,919 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2020-10-13 10:15:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:15:39,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 10:15:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:39,921 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:15:39,921 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:15:39,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:15:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:15:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:15:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-13 10:15:39,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2020-10-13 10:15:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:39,929 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-13 10:15:39,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:15:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-13 10:15:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:15:39,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:39,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:39,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:15:39,932 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -868464709, now seen corresponding path program 1 times [2020-10-13 10:15:39,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:39,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32548886] [2020-10-13 10:15:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:39,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:39,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:40,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:40,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:15:40,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:15:40,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 10:15:40,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:40,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:15:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:15:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:15:40,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:40,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:40,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:40,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:40,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:40,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:40,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:40,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:40,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:15:40,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32548886] [2020-10-13 10:15:40,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:40,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:15:40,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137467232] [2020-10-13 10:15:40,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:40,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:40,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:40,109 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-10-13 10:15:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:40,176 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-13 10:15:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:15:40,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 10:15:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:40,178 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:15:40,178 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:15:40,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:15:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:15:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:15:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:15:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 10:15:40,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-13 10:15:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:40,184 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 10:15:40,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:15:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 10:15:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:15:40,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:40,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:40,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:15:40,186 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash -853360672, now seen corresponding path program 1 times [2020-10-13 10:15:40,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:40,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449362499] [2020-10-13 10:15:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:40,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:40,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:15:40,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 10:15:40,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:15:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:15:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:15:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:40,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:40,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:40,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:40,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:15:40,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:40,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:40,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449362499] [2020-10-13 10:15:40,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:40,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:15:40,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958019224] [2020-10-13 10:15:40,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:40,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:40,297 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-10-13 10:15:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:40,370 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-13 10:15:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:15:40,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 10:15:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:40,372 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:15:40,372 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:15:40,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:15:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:15:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 10:15:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:15:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 10:15:40,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-10-13 10:15:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:40,379 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 10:15:40,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:15:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 10:15:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:15:40,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:40,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:40,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:15:40,381 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash -307761731, now seen corresponding path program 1 times [2020-10-13 10:15:40,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:40,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110070771] [2020-10-13 10:15:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:15:40,396 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:15:40,396 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:15:40,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:15:40,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:15:40 BoogieIcfgContainer [2020-10-13 10:15:40,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:15:40,424 INFO L168 Benchmark]: Toolchain (without parser) took 2903.46 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 103.9 MB in the beginning and 99.3 MB in the end (delta: 4.6 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:40,424 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:15:40,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 420.42 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 92.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:40,426 INFO L168 Benchmark]: Boogie Preprocessor took 126.18 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 179.8 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:40,427 INFO L168 Benchmark]: RCFGBuilder took 422.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:40,428 INFO L168 Benchmark]: TraceAbstraction took 1928.98 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 160.0 MB in the beginning and 99.3 MB in the end (delta: 60.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:40,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 420.42 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 92.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.18 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 179.8 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1928.98 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 160.0 MB in the beginning and 99.3 MB in the end (delta: 60.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 94]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 43, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of to_real at line 44. Possible FailurePath: [L1] int __return_main; [L15] double __return_104; [L18] double main__a; [L19] double main__r; [L20] main__a = __VERIFIER_nondet_double() [L21] int main____CPAchecker_TMP_0; [L22] COND TRUE main__a >= 20.0 [L24] COND TRUE main__a <= 30.0 [L26] main____CPAchecker_TMP_0 = 1 [L28] COND TRUE main____CPAchecker_TMP_0 != 0 [L31] double __tmp_1; [L32] __tmp_1 = main__a [L33] double inv__A; [L34] inv__A = __tmp_1 [L35] double inv__xi; [L36] double inv__xsi; [L37] double inv__temp; [L38] signed int inv__cond; [L39] signed int inv__exp; [L40] union double_int inv__A_u; [L41] union double_int inv__xi_u; [L42] inv__A_u.d = inv__A [L43] EXPR inv__A_u.i [L43] inv__exp = ((signed int)(((inv__A_u.i) & 2146435072) >> 20)) - 1023 [L44] inv__xi_u.d = 1 [L45] inv__xi_u.i = (1023 - inv__exp) << 20 [L46] EXPR inv__xi_u.d [L46] inv__xi = inv__xi_u.d [L47] inv__cond = 1 [L49] COND TRUE !(inv__cond == 0) [L51] inv__xsi = (2 * inv__xi) - ((inv__A * inv__xi) * inv__xi) [L52] inv__temp = inv__xsi - inv__xi [L53] int inv____CPAchecker_TMP_0; [L54] COND FALSE !(inv__temp > 1.0E-10) [L65] COND FALSE !(inv__temp < -1.0E-10) [L71] inv____CPAchecker_TMP_0 = 0 [L59] inv__cond = inv____CPAchecker_TMP_0 [L60] inv__xi = inv__xsi [L49] COND FALSE !(!(inv__cond == 0)) [L78] __return_104 = inv__xi [L79] main__r = __return_104 [L80] int main____CPAchecker_TMP_1; [L81] COND FALSE !(main__r >= 0) [L106] main____CPAchecker_TMP_1 = 0 [L88] int __tmp_2; [L89] __tmp_2 = main____CPAchecker_TMP_1 [L90] int __VERIFIER_assert__cond; [L91] __VERIFIER_assert__cond = __tmp_2 [L92] COND TRUE __VERIFIER_assert__cond == 0 [L94] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 34 SDslu, 114 SDs, 0 SdLazy, 139 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 2396 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 3/3 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...