/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_1250.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:28:30,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:28:30,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:28:30,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:28:30,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:28:30,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:28:30,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:28:30,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:28:30,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:28:30,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:28:30,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:28:30,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:28:30,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:28:30,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:28:30,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:28:30,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:28:30,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:28:30,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:28:30,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:28:30,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:28:30,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:28:30,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:28:30,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:28:30,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:28:30,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:28:30,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:28:30,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:28:30,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:28:30,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:28:30,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:28:30,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:28:30,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:28:30,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:28:30,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:28:30,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:28:30,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:28:30,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:28:30,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:28:30,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:28:30,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:28:30,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:28:30,638 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 14:28:30,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:28:30,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:28:30,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:28:30,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:28:30,690 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:28:30,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:28:30,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:28:30,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:28:30,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:28:30,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:28:30,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:28:30,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:28:30,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:28:30,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:28:30,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:28:30,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:28:30,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:28:30,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:28:30,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:28:30,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:28:30,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:28:30,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:28:30,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:28:30,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:28:30,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:28:30,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:28:30,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:28:30,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:28:30,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:28:30,697 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:28:31,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:28:31,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:28:31,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:28:31,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:28:31,166 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:28:31,167 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1250.c [2020-09-25 14:28:31,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/341f3fad5/13286cc9c8114762949fb24d11e616fe/FLAGb88dc99fe [2020-09-25 14:28:31,790 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:28:31,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1250.c [2020-09-25 14:28:31,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/341f3fad5/13286cc9c8114762949fb24d11e616fe/FLAGb88dc99fe [2020-09-25 14:28:32,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/341f3fad5/13286cc9c8114762949fb24d11e616fe [2020-09-25 14:28:32,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:28:32,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:28:32,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:28:32,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:28:32,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:28:32,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c5cb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32, skipping insertion in model container [2020-09-25 14:28:32,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:28:32,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:28:32,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:28:32,493 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:28:32,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:28:32,691 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:28:32,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32 WrapperNode [2020-09-25 14:28:32,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:28:32,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:28:32,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:28:32,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:28:32,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (1/1) ... [2020-09-25 14:28:32,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:28:32,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:28:32,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:28:32,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:28:32,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (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 14:28:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:28:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:28:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-25 14:28:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-09-25 14:28:32,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-25 14:28:32,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:28:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:28:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-25 14:28:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 14:28:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 14:28:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 14:28:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:28:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-09-25 14:28:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-25 14:28:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:28:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:28:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:28:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 14:28:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 14:28:33,302 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:28:33,303 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 14:28:33,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:28:33 BoogieIcfgContainer [2020-09-25 14:28:33,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:28:33,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:28:33,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:28:33,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:28:33,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:28:32" (1/3) ... [2020-09-25 14:28:33,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331ed538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:28:33, skipping insertion in model container [2020-09-25 14:28:33,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:32" (2/3) ... [2020-09-25 14:28:33,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331ed538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:28:33, skipping insertion in model container [2020-09-25 14:28:33,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:28:33" (3/3) ... [2020-09-25 14:28:33,318 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2020-09-25 14:28:33,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:28:33,340 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:28:33,361 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:28:33,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:28:33,394 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:28:33,394 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:28:33,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:28:33,395 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:28:33,395 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:28:33,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:28:33,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:28:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-09-25 14:28:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 14:28:33,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:33,432 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] [2020-09-25 14:28:33,433 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1283430724, now seen corresponding path program 1 times [2020-09-25 14:28:33,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:33,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304498064] [2020-09-25 14:28:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:33,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:33,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:33,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:33,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 14:28:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:28:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-09-25 14:28:34,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:34,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:34,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:28:34,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 14:28:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 14:28:34,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 14:28:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:28:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:34,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:34,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:34,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:28:34,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 14:28:34,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:34,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:34,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 14:28:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:34,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:34,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:34,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:34,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:34,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:28:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 14:28:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 14:28:34,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:34,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:28:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:34,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:34,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:34,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 14:28:34,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:28:34,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 14:28:34,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:34,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:28:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:28:34,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:34,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:28:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:34,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:34,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:34,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 14:28:34,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 14:28:34,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:34,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:28:34,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:34,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:34,246 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 14:28:34,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304498064] [2020-09-25 14:28:34,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:28:34,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 14:28:34,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681395084] [2020-09-25 14:28:34,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:28:34,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:28:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:28:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:28:34,281 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 6 states. [2020-09-25 14:28:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:28:34,626 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2020-09-25 14:28:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:28:34,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-09-25 14:28:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:28:34,644 INFO L225 Difference]: With dead ends: 137 [2020-09-25 14:28:34,644 INFO L226 Difference]: Without dead ends: 71 [2020-09-25 14:28:34,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 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 14:28:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-25 14:28:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-09-25 14:28:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 14:28:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-09-25 14:28:34,720 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 37 [2020-09-25 14:28:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:28:34,721 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-09-25 14:28:34,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:28:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-09-25 14:28:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 14:28:34,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:34,725 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] [2020-09-25 14:28:34,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:28:34,726 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1210069817, now seen corresponding path program 1 times [2020-09-25 14:28:34,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:34,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966168423] [2020-09-25 14:28:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:35,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:35,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 14:28:35,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-09-25 14:28:35,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:35,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:28:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:28:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 14:28:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:35,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:28:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:35,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:35,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:35,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:28:35,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:35,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:28:35,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:35,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:35,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 14:28:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:35,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:35,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 14:28:35,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:35,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-25 14:28:35,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:35,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:28:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 14:28:35,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 14:28:35,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:35,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:28:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:35,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:35,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:28:35,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:35,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 14:28:35,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:35,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:28:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 14:28:35,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 14:28:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:35,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:35,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 14:28:35,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:35,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:28:35,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:35,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:28:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:35,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:35,344 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 14:28:35,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966168423] [2020-09-25 14:28:35,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:28:35,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 14:28:35,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261241696] [2020-09-25 14:28:35,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:28:35,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:28:35,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:28:35,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:28:35,348 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 6 states. [2020-09-25 14:28:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:28:35,583 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-09-25 14:28:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:28:35,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-25 14:28:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:28:35,585 INFO L225 Difference]: With dead ends: 91 [2020-09-25 14:28:35,586 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 14:28:35,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 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 14:28:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 14:28:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-09-25 14:28:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 14:28:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-09-25 14:28:35,599 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 49 [2020-09-25 14:28:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:28:35,600 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-09-25 14:28:35,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:28:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-09-25 14:28:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 14:28:35,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:35,602 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] [2020-09-25 14:28:35,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:28:35,603 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:35,603 INFO L82 PathProgramCache]: Analyzing trace with hash 815123193, now seen corresponding path program 1 times [2020-09-25 14:28:35,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:35,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475839831] [2020-09-25 14:28:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:28:35,635 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:28:35,635 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:28:35,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:28:35,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:28:35 BoogieIcfgContainer [2020-09-25 14:28:35,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:28:35,669 INFO L168 Benchmark]: Toolchain (without parser) took 3521.77 ms. Allocated memory was 141.6 MB in the beginning and 233.8 MB in the end (delta: 92.3 MB). Free memory was 104.6 MB in the beginning and 114.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:35,671 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:28:35,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.64 ms. Allocated memory was 141.6 MB in the beginning and 208.1 MB in the end (delta: 66.6 MB). Free memory was 103.9 MB in the beginning and 187.1 MB in the end (delta: -83.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:35,673 INFO L168 Benchmark]: Boogie Preprocessor took 82.31 ms. Allocated memory is still 208.1 MB. Free memory was 187.1 MB in the beginning and 184.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:35,674 INFO L168 Benchmark]: RCFGBuilder took 530.34 ms. Allocated memory is still 208.1 MB. Free memory was 184.7 MB in the beginning and 164.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:35,675 INFO L168 Benchmark]: TraceAbstraction took 2355.99 ms. Allocated memory was 208.1 MB in the beginning and 233.8 MB in the end (delta: 25.7 MB). Free memory was 163.8 MB in the beginning and 114.0 MB in the end (delta: 49.8 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:35,679 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 543.64 ms. Allocated memory was 141.6 MB in the beginning and 208.1 MB in the end (delta: 66.6 MB). Free memory was 103.9 MB in the beginning and 187.1 MB in the end (delta: -83.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.31 ms. Allocated memory is still 208.1 MB. Free memory was 187.1 MB in the beginning and 184.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 530.34 ms. Allocated memory is still 208.1 MB. Free memory was 184.7 MB in the beginning and 164.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2355.99 ms. Allocated memory was 208.1 MB in the beginning and 233.8 MB in the end (delta: 25.7 MB). Free memory was 163.8 MB in the beginning and 114.0 MB in the end (delta: 49.8 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 65]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 54, overapproximation of someBinaryArithmeticFLOAToperation at line 61. Possible FailurePath: [L60] float x = 0.0f / 0.0f; [L61] float y = 0.0f / 0.0f; [L62] CALL, EXPR fmax_float(x, y) [L43] CALL, EXPR __fpclassify_float(x) [L20] __uint32_t w; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (w) = gf_u.word [L28] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L30-L31] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L33-L34] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L36] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L39] return 0; [L43] RET, EXPR __fpclassify_float(x) [L43] COND TRUE __fpclassify_float(x) == 0 [L44] return y; [L62] RET, EXPR fmax_float(x, y) [L62] float res = fmax_float(x, y); [L64] CALL, EXPR isnan_float(res) [L54] return x != x; [L64] RET, EXPR isnan_float(res) [L64] COND TRUE !isnan_float(res) [L65] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 150 SDtfs, 40 SDslu, 349 SDs, 0 SdLazy, 221 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred 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, 2 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 7428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...