/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 SingleStatement --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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:11:18,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:11:18,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:11:18,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:11:18,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:11:18,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:11:18,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:11:18,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:11:18,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:11:18,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:11:18,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:11:18,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:11:18,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:11:18,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:11:18,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:11:18,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:11:18,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:11:18,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:11:18,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:11:19,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:11:19,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:11:19,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:11:19,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:11:19,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:11:19,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:11:19,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:11:19,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:11:19,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:11:19,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:11:19,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:11:19,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:11:19,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:11:19,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:11:19,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:11:19,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:11:19,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:11:19,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:11:19,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:11:19,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:11:19,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:11:19,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:11:19,032 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 [2020-09-24 18:11:19,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:11:19,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:11:19,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:11:19,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:11:19,086 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:11:19,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:11:19,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:11:19,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:11:19,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:11:19,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:11:19,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:11:19,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:11:19,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:11:19,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:11:19,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:11:19,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:11:19,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:11:19,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:11:19,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:11:19,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:11:19,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:11:19,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:11:19,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:11:19,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:11:19,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:11:19,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:11:19,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:11:19,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:11:19,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:11:19,093 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 -> SingleStatement 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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=true; [2020-09-24 18:11:19,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:11:19,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:11:19,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:11:19,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:11:19,571 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:11:19,572 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-09-24 18:11:19,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb9dc6c8/1429a27a4e3f4f5fa35b675436e38cb7/FLAG3461d9ecc [2020-09-24 18:11:20,212 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:11:20,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-09-24 18:11:20,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb9dc6c8/1429a27a4e3f4f5fa35b675436e38cb7/FLAG3461d9ecc [2020-09-24 18:11:20,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb9dc6c8/1429a27a4e3f4f5fa35b675436e38cb7 [2020-09-24 18:11:20,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:11:20,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:11:20,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:11:20,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:11:20,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:11:20,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:20,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e979d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20, skipping insertion in model container [2020-09-24 18:11:20,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:20,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:11:20,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:11:20,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:11:20,876 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:11:20,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:11:20,930 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:11:20,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20 WrapperNode [2020-09-24 18:11:20,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:11:20,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:11:20,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:11:20,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:11:21,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (1/1) ... [2020-09-24 18:11:21,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:11:21,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:11:21,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:11:21,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:11:21,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (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 [2020-09-24 18:11:21,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:11:21,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:11:21,140 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2020-09-24 18:11:21,141 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-24 18:11:21,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:11:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:11:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-24 18:11:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2020-09-24 18:11:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 18:11:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 18:11:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:11:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:11:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:11:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 18:11:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-24 18:11:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:11:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:11:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:11:21,553 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:11:21,554 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 18:11:21,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:11:21 BoogieIcfgContainer [2020-09-24 18:11:21,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:11:21,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:11:21,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:11:21,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:11:21,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:11:20" (1/3) ... [2020-09-24 18:11:21,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74468bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:11:21, skipping insertion in model container [2020-09-24 18:11:21,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:20" (2/3) ... [2020-09-24 18:11:21,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74468bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:11:21, skipping insertion in model container [2020-09-24 18:11:21,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:11:21" (3/3) ... [2020-09-24 18:11:21,570 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2020-09-24 18:11:21,580 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:11:21,588 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:11:21,610 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:11:21,641 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:11:21,641 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:11:21,641 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:11:21,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:11:21,642 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:11:21,642 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:11:21,642 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:11:21,642 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:11:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-09-24 18:11:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 18:11:21,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:21,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:21,676 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:21,684 INFO L82 PathProgramCache]: Analyzing trace with hash 658521785, now seen corresponding path program 1 times [2020-09-24 18:11:21,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:21,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702638928] [2020-09-24 18:11:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:21,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:21,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:22,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:22,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 18:11:22,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:11:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-09-24 18:11:22,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 18:11:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:22,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:11:22,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:22,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:22,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:22,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:11:22,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:22,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 18:11:22,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:22,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 18:11:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:22,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:22,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:22,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-24 18:11:22,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:11:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:11:22,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:22,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-24 18:11:22,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:22,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 18:11:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:22,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:22,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:22,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:11:22,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:22,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:11:22,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 18:11:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:22,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:11:22,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702638928] [2020-09-24 18:11:22,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:11:22,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:11:22,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094305053] [2020-09-24 18:11:22,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:11:22,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:11:22,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:11:22,336 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 4 states. [2020-09-24 18:11:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:22,566 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-09-24 18:11:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:11:22,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-24 18:11:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:22,583 INFO L225 Difference]: With dead ends: 118 [2020-09-24 18:11:22,583 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 18:11:22,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:11:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 18:11:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-24 18:11:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 18:11:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 59 transitions. [2020-09-24 18:11:22,649 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 59 transitions. Word has length 32 [2020-09-24 18:11:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:22,650 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 59 transitions. [2020-09-24 18:11:22,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:11:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 59 transitions. [2020-09-24 18:11:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 18:11:22,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:22,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:22,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:11:22,654 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:22,655 INFO L82 PathProgramCache]: Analyzing trace with hash 418826666, now seen corresponding path program 1 times [2020-09-24 18:11:22,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:22,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217981362] [2020-09-24 18:11:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:11:22,710 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:11:22,716 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:11:22,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:11:22,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:11:22 BoogieIcfgContainer [2020-09-24 18:11:22,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:11:22,756 INFO L168 Benchmark]: Toolchain (without parser) took 2184.05 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 104.5 MB in the beginning and 100.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:22,757 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 18:11:22,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.39 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 93.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:22,760 INFO L168 Benchmark]: Boogie Preprocessor took 126.21 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:22,761 INFO L168 Benchmark]: RCFGBuilder took 502.14 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 161.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:22,762 INFO L168 Benchmark]: TraceAbstraction took 1191.17 ms. Allocated memory is still 203.9 MB. Free memory was 160.3 MB in the beginning and 100.0 MB in the end (delta: 60.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:22,766 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.39 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 93.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.21 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 502.14 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 161.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1191.17 ms. Allocated memory is still 203.9 MB. Free memory was 160.3 MB in the beginning and 100.0 MB in the end (delta: 60.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 49]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 33, overapproximation of bitwiseOr at line 26, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L43] float x = 0.0f / 0.0f; [L44] float y = __VERIFIER_nondet_float(); [L45] CALL, EXPR copysign_float(x, y) [L13] __uint32_t ix, iy; [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (ix) = gf_u.word [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (y) [L22] EXPR gf_u.word [L22] (iy) = gf_u.word [L25] ieee_float_shape_type sf_u; [L26] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) [L27] EXPR sf_u.value [L27] (x) = sf_u.value [L29] return x; [L45] RET, EXPR copysign_float(x, y) [L45] float res = copysign_float(x, y); [L48] CALL, EXPR isnan_float(res) [L33] return x != x; [L48] RET, EXPR isnan_float(res) [L48] COND TRUE !isnan_float(res) [L49] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 21 SDslu, 35 SDs, 0 SdLazy, 68 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 1612 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...