/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=0.1 --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_1232a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:58:15,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:58:15,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:58:15,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:58:15,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:58:15,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:58:15,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:58:15,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:58:15,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:58:15,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:58:15,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:58:15,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:58:15,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:58:15,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:58:15,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:58:15,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:58:15,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:58:15,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:58:15,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:58:15,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:58:15,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:58:15,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:58:15,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:58:15,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:58:15,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:58:15,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:58:15,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:58:15,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:58:15,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:58:15,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:58:15,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:58:15,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:58:15,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:58:15,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:58:15,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:58:15,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:58:15,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:58:15,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:58:15,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:58:15,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:58:15,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:58:15,344 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 09:58:15,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:58:15,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:58:15,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:58:15,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:58:15,372 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:58:15,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:58:15,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:58:15,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:58:15,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:58:15,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:58:15,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:58:15,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:58:15,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:58:15,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:58:15,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:58:15,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:58:15,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:58:15,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:58:15,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:58:15,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:58:15,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:58:15,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:58:15,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:58:15,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:58:15,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:58:15,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:58:15,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:58:15,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:58:15,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:58:15,377 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=0.1;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=0.1;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=0.1;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=0.1;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=0.1;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=0.1;log-additional-information=true; [2020-09-25 09:58:15,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:58:15,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:58:15,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:58:15,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:58:15,878 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:58:15,879 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232a.c [2020-09-25 09:58:15,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92efd2cae/628e65e07a7b41fca71a463562072c36/FLAG013373cdd [2020-09-25 09:58:16,459 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:58:16,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1232a.c [2020-09-25 09:58:16,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92efd2cae/628e65e07a7b41fca71a463562072c36/FLAG013373cdd [2020-09-25 09:58:16,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92efd2cae/628e65e07a7b41fca71a463562072c36 [2020-09-25 09:58:16,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:58:16,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:58:16,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:58:16,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:58:16,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:58:16,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:58:16" (1/1) ... [2020-09-25 09:58:16,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32333996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:16, skipping insertion in model container [2020-09-25 09:58:16,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:58:16" (1/1) ... [2020-09-25 09:58:16,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:58:16,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:58:17,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:58:17,160 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:58:17,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:58:17,292 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:58:17,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17 WrapperNode [2020-09-25 09:58:17,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:58:17,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:58:17,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:58:17,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:58:17,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (1/1) ... [2020-09-25 09:58:17,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:58:17,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:58:17,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:58:17,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:58:17,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (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 09:58:17,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:58:17,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:58:17,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-25 09:58:17,431 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2020-09-25 09:58:17,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-25 09:58:17,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:58:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:58:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 09:58:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-25 09:58:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 09:58:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 09:58:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 09:58:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 09:58:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2020-09-25 09:58:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-25 09:58:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:58:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:58:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:58:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 09:58:17,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 09:58:17,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:58:17,814 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 09:58:17,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:58:17 BoogieIcfgContainer [2020-09-25 09:58:17,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:58:17,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:58:17,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:58:17,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:58:17,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:58:16" (1/3) ... [2020-09-25 09:58:17,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738dc9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:58:17, skipping insertion in model container [2020-09-25 09:58:17,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:17" (2/3) ... [2020-09-25 09:58:17,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738dc9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:58:17, skipping insertion in model container [2020-09-25 09:58:17,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:58:17" (3/3) ... [2020-09-25 09:58:17,830 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2020-09-25 09:58:17,842 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:58:17,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:58:17,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:58:17,907 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:58:17,907 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:58:17,907 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:58:17,907 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:58:17,908 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:58:17,908 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:58:17,908 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:58:17,908 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:58:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-09-25 09:58:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 09:58:17,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:58:17,943 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 09:58:17,944 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:58:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:58:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash -380814032, now seen corresponding path program 1 times [2020-09-25 09:58:17,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:58:17,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512710270] [2020-09-25 09:58:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:58:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:18,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:18,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 09:58:18,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:58:18,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-09-25 09:58:18,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:18,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:18,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:58:18,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:58:18,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 09:58:18,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:58:18,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:58:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:18,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:18,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:58:18,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:18,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 09:58:18,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:18,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:58:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:58:18,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 09:58:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:18,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 09:58:18,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:58:18,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 09:58:18,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:18,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:58:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:58:18,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 09:58:18,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:58:18,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 09:58:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:18,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:18,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:58:18,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:58:18,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 09:58:18,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:18,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:58:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 09:58:18,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:58:18,739 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 09:58:18,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512710270] [2020-09-25 09:58:18,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:58:18,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 09:58:18,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205037118] [2020-09-25 09:58:18,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:58:18,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:58:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:58:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:58:18,773 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 6 states. [2020-09-25 09:58:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:58:19,138 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2020-09-25 09:58:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:58:19,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-09-25 09:58:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:58:19,153 INFO L225 Difference]: With dead ends: 169 [2020-09-25 09:58:19,153 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 09:58:19,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:58:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 09:58:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-25 09:58:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 09:58:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 09:58:19,227 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 34 [2020-09-25 09:58:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:58:19,228 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 09:58:19,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:58:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 09:58:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 09:58:19,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:58:19,232 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 09:58:19,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:58:19,232 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:58:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:58:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash 619089939, now seen corresponding path program 1 times [2020-09-25 09:58:19,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:58:19,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62032722] [2020-09-25 09:58:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:58:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:19,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:19,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:58:19,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:19,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-25 09:58:19,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:19,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:58:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 09:58:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 09:58:19,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:19,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:58:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:19,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:19,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:58:19,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:58:19,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:19,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:58:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:58:19,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:19,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 09:58:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:19,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:19,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:19,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:58:19,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:19,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-25 09:58:19,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:19,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:19,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:58:19,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 09:58:19,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 09:58:19,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:19,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 09:58:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:19,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:19,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:58:19,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 09:58:19,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:19,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:58:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 09:58:19,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:19,713 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 09:58:19,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62032722] [2020-09-25 09:58:19,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:58:19,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 09:58:19,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973179590] [2020-09-25 09:58:19,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:58:19,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:58:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:58:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:58:19,718 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-25 09:58:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:58:19,927 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-25 09:58:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:58:19,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-25 09:58:19,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:58:19,930 INFO L225 Difference]: With dead ends: 121 [2020-09-25 09:58:19,930 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 09:58:19,931 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 09:58:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 09:58:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 09:58:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 09:58:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 09:58:19,944 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 46 [2020-09-25 09:58:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:58:19,945 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 09:58:19,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:58:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 09:58:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 09:58:19,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:58:19,947 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 09:58:19,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:58:19,948 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:58:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:58:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1331564627, now seen corresponding path program 1 times [2020-09-25 09:58:19,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:58:19,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049990135] [2020-09-25 09:58:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:58:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:58:19,977 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:58:19,977 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:58:19,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:58:20,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:58:20 BoogieIcfgContainer [2020-09-25 09:58:20,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:58:20,016 INFO L168 Benchmark]: Toolchain (without parser) took 3180.99 ms. Allocated memory was 138.4 MB in the beginning and 232.3 MB in the end (delta: 93.8 MB). Free memory was 101.1 MB in the beginning and 110.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:20,018 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 09:58:20,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.17 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 179.6 MB in the end (delta: -79.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:20,021 INFO L168 Benchmark]: Boogie Preprocessor took 59.64 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 177.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:20,022 INFO L168 Benchmark]: RCFGBuilder took 466.45 ms. Allocated memory is still 200.8 MB. Free memory was 177.2 MB in the beginning and 153.7 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:20,024 INFO L168 Benchmark]: TraceAbstraction took 2189.15 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 153.0 MB in the beginning and 110.1 MB in the end (delta: 43.0 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:20,036 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 456.17 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 179.6 MB in the end (delta: -79.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.64 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 177.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 466.45 ms. Allocated memory is still 200.8 MB. Free memory was 177.2 MB in the beginning and 153.7 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2189.15 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 153.0 MB in the beginning and 110.1 MB in the end (delta: 43.0 MB). Peak memory consumption was 74.4 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 65. 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: 2.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 36 SDslu, 444 SDs, 0 SdLazy, 264 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 6312 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...