/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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_1232b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:51:55,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:51:55,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:51:55,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:51:55,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:51:55,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:51:55,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:51:55,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:51:55,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:51:55,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:51:55,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:51:55,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:51:55,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:51:55,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:51:55,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:51:55,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:51:55,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:51:55,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:51:55,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:51:55,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:51:55,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:51:55,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:51:55,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:51:55,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:51:55,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:51:55,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:51:55,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:51:55,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:51:55,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:51:55,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:51:55,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:51:55,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:51:55,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:51:55,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:51:55,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:51:55,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:51:55,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:51:55,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:51:55,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:51:55,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:51:55,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:51:55,657 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 [2020-09-25 08:51:55,685 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:51:55,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:51:55,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:51:55,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:51:55,687 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:51:55,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:51:55,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:51:55,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:51:55,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:51:55,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:51:55,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:51:55,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:51:55,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:51:55,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:51:55,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:51:55,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:51:55,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:51:55,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:51:55,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:51:55,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:51:55,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:51:55,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:51:55,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:51:55,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:51:55,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:51:55,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:51:55,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:51:55,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:51:55,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:51:55,698 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 08:51:56,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:51:56,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:51:56,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:51:56,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:51:56,200 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:51:56,201 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-09-25 08:51:56,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea8f1fad1/de95b163da6048019aeb6ecc44790b15/FLAG3436feb75 [2020-09-25 08:51:56,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:51:56,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-09-25 08:51:56,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea8f1fad1/de95b163da6048019aeb6ecc44790b15/FLAG3436feb75 [2020-09-25 08:51:57,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea8f1fad1/de95b163da6048019aeb6ecc44790b15 [2020-09-25 08:51:57,188 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:51:57,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:51:57,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:51:57,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:51:57,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:51:57,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57, skipping insertion in model container [2020-09-25 08:51:57,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:51:57,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:51:57,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:51:57,489 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:51:57,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:51:57,546 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:51:57,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57 WrapperNode [2020-09-25 08:51:57,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:51:57,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:51:57,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:51:57,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:51:57,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (1/1) ... [2020-09-25 08:51:57,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:51:57,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:51:57,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:51:57,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:51:57,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (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 [2020-09-25 08:51:57,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-25 08:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2020-09-25 08:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-25 08:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 08:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-25 08:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 08:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2020-09-25 08:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-25 08:51:57,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:51:57,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:51:57,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:51:57,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 08:51:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:51:58,236 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:51:58,236 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 08:51:58,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:51:58 BoogieIcfgContainer [2020-09-25 08:51:58,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:51:58,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:51:58,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:51:58,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:51:58,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:51:57" (1/3) ... [2020-09-25 08:51:58,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d63fa4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:51:58, skipping insertion in model container [2020-09-25 08:51:58,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:57" (2/3) ... [2020-09-25 08:51:58,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d63fa4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:51:58, skipping insertion in model container [2020-09-25 08:51:58,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:51:58" (3/3) ... [2020-09-25 08:51:58,252 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-09-25 08:51:58,261 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:51:58,271 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:51:58,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:51:58,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:51:58,319 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:51:58,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:51:58,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:51:58,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:51:58,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:51:58,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:51:58,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:51:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-09-25 08:51:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 08:51:58,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:51:58,352 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] [2020-09-25 08:51:58,353 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:51:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:51:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash -380814032, now seen corresponding path program 1 times [2020-09-25 08:51:58,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:51:58,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911892010] [2020-09-25 08:51:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:51:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:58,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:58,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:58,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 08:51:58,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:51:58,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-09-25 08:51:58,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:58,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:58,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:58,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 08:51:58,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:58,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:51:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:51:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:58,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:58,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:51:58,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:58,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 08:51:58,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:58,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:51:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:51:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:59,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:59,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:59,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:59,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 08:51:59,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:51:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 08:51:59,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:59,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 08:51:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 08:51:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:59,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:59,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:51:59,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:59,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:51:59,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:59,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:59,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:59,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-25 08:51:59,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:59,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:51:59,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911892010] [2020-09-25 08:51:59,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:51:59,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:51:59,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253481479] [2020-09-25 08:51:59,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:51:59,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:51:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:51:59,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:51:59,133 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-09-25 08:51:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:51:59,464 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-09-25 08:51:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:51:59,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-25 08:51:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:51:59,486 INFO L225 Difference]: With dead ends: 164 [2020-09-25 08:51:59,487 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 08:51:59,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:51:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 08:51:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-25 08:51:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 08:51:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-25 08:51:59,580 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 34 [2020-09-25 08:51:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:51:59,580 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-25 08:51:59,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:51:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-25 08:51:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 08:51:59,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:51:59,584 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] [2020-09-25 08:51:59,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:51:59,585 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:51:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:51:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash 133434162, now seen corresponding path program 1 times [2020-09-25 08:51:59,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:51:59,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16891675] [2020-09-25 08:51:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:51:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:59,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:59,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 08:51:59,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-25 08:51:59,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:59,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:59,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:51:59,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 08:51:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:51:59,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:59,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:51:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:59,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:59,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:51:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 08:51:59,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:59,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:59,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:51:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:59,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:59,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:51:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:59,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:59,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:59,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 08:52:00,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-25 08:52:00,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:00,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 08:52:00,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:00,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 08:52:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 08:52:00,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-25 08:52:00,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 08:52:00,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:52:00,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16891675] [2020-09-25 08:52:00,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:52:00,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:52:00,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762570263] [2020-09-25 08:52:00,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:52:00,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:52:00,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:52:00,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:52:00,124 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2020-09-25 08:52:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:52:00,374 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-09-25 08:52:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:52:00,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-09-25 08:52:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:52:00,379 INFO L225 Difference]: With dead ends: 117 [2020-09-25 08:52:00,380 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 08:52:00,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:52:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 08:52:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-25 08:52:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 08:52:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 08:52:00,398 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 43 [2020-09-25 08:52:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:52:00,399 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 08:52:00,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:52:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 08:52:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 08:52:00,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:52:00,401 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] [2020-09-25 08:52:00,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:52:00,402 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:52:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:52:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash 619089939, now seen corresponding path program 1 times [2020-09-25 08:52:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:52:00,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486999294] [2020-09-25 08:52:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:52:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 08:52:00,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:00,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 08:52:00,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:00,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:00,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:52:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:52:00,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:52:00,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:00,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:00,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 08:52:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:52:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 08:52:00,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-25 08:52:00,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 08:52:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:00,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:52:00,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 08:52:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 08:52:00,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-25 08:52:00,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 08:52:00,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:52:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:52:00,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486999294] [2020-09-25 08:52:00,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:52:00,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:52:00,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399159827] [2020-09-25 08:52:00,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:52:00,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:52:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:52:00,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:52:00,980 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-25 08:52:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:52:01,255 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-25 08:52:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:52:01,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-25 08:52:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:52:01,259 INFO L225 Difference]: With dead ends: 121 [2020-09-25 08:52:01,259 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 08:52:01,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:52:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 08:52:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 08:52:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 08:52:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 08:52:01,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 46 [2020-09-25 08:52:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:52:01,284 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 08:52:01,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:52:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 08:52:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 08:52:01,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:52:01,290 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] [2020-09-25 08:52:01,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:52:01,294 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:52:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:52:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1331564627, now seen corresponding path program 1 times [2020-09-25 08:52:01,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:52:01,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034828786] [2020-09-25 08:52:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:52:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:52:01,318 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:52:01,318 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:52:01,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:52:01,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:52:01 BoogieIcfgContainer [2020-09-25 08:52:01,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:52:01,351 INFO L168 Benchmark]: Toolchain (without parser) took 4158.79 ms. Allocated memory was 145.8 MB in the beginning and 248.0 MB in the end (delta: 102.2 MB). Free memory was 101.9 MB in the beginning and 188.8 MB in the end (delta: -86.9 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:01,352 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-25 08:52:01,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.75 ms. Allocated memory is still 145.8 MB. Free memory was 101.2 MB in the beginning and 90.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:01,354 INFO L168 Benchmark]: Boogie Preprocessor took 143.09 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 180.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:01,355 INFO L168 Benchmark]: RCFGBuilder took 551.82 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 156.3 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:01,356 INFO L168 Benchmark]: TraceAbstraction took 3103.23 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 155.6 MB in the beginning and 188.8 MB in the end (delta: -33.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:01,360 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 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.75 ms. Allocated memory is still 145.8 MB. Free memory was 101.2 MB in the beginning and 90.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.09 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 180.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 551.82 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 156.3 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3103.23 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 155.6 MB in the beginning and 188.8 MB in the end (delta: -33.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 69, overapproximation of someUnaryFLOAToperation at line 64. Possible FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; [L66] CALL, EXPR fmin_float(x, y) [L36] CALL, EXPR __fpclassify_float(x) [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; [L36] RET, EXPR __fpclassify_float(x) [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; [L66] RET, EXPR fmin_float(x, y) [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 89 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 267 SDtfs, 53 SDslu, 494 SDs, 0 SdLazy, 352 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred 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: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 9534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...