/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1232b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:20:40,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:20:40,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:20:40,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:20:40,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:20:40,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:20:40,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:20:40,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:20:40,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:20:40,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:20:40,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:20:40,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:20:40,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:20:40,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:20:40,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:20:40,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:20:40,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:20:40,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:20:40,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:20:40,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:20:40,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:20:40,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:20:40,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:20:40,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:20:40,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:20:40,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:20:40,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:20:40,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:20:40,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:20:40,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:20:40,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:20:40,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:20:40,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:20:40,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:20:40,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:20:40,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:20:40,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:20:40,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:20:40,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:20:40,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:20:40,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:20:40,288 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 [2020-09-21 12:20:40,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:20:40,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:20:40,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:20:40,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:20:40,318 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:20:40,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:20:40,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:20:40,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:20:40,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:20:40,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:20:40,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:20:40,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:20:40,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:20:40,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:20:40,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:20:40,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:20:40,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:20:40,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:20:40,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:20:40,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:20:40,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:20:40,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:20:40,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:20:40,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:20:40,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:20:40,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:20:40,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:20:40,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:20:40,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:20:40,323 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.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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:20:40,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:20:40,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:20:40,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:20:40,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:20:40,827 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:20:40,829 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1232b.c [2020-09-21 12:20:40,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6bc4fa8b/ece0128152f34147827ea9451520c452/FLAG303a1ae15 [2020-09-21 12:20:41,508 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:20:41,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1232b.c [2020-09-21 12:20:41,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6bc4fa8b/ece0128152f34147827ea9451520c452/FLAG303a1ae15 [2020-09-21 12:20:41,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6bc4fa8b/ece0128152f34147827ea9451520c452 [2020-09-21 12:20:41,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:20:41,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:20:41,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:20:41,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:20:41,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:20:41,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:20:41" (1/1) ... [2020-09-21 12:20:41,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78523b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:41, skipping insertion in model container [2020-09-21 12:20:41,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:20:41" (1/1) ... [2020-09-21 12:20:41,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:20:41,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:20:42,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:20:42,152 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:20:42,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:20:42,299 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:20:42,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42 WrapperNode [2020-09-21 12:20:42,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:20:42,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:20:42,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:20:42,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:20:42,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:20:42,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:20:42,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:20:42,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:20:42,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (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 [2020-09-21 12:20:42,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:20:42,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:20:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-09-21 12:20:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2020-09-21 12:20:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_double [2020-09-21 12:20:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-09-21 12:20:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:20:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:20:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-21 12:20:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-09-21 12:20:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2020-09-21 12:20:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:20:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 12:20:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:20:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:20:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_double [2020-09-21 12:20:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-09-21 12:20:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:20:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:20:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:20:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:20:42,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 12:20:42,900 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:20:42,900 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 12:20:42,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:20:42 BoogieIcfgContainer [2020-09-21 12:20:42,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:20:42,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:20:42,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:20:42,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:20:42,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:20:41" (1/3) ... [2020-09-21 12:20:42,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f54bdbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:20:42, skipping insertion in model container [2020-09-21 12:20:42,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42" (2/3) ... [2020-09-21 12:20:42,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f54bdbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:20:42, skipping insertion in model container [2020-09-21 12:20:42,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:20:42" (3/3) ... [2020-09-21 12:20:42,914 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2020-09-21 12:20:42,924 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:20:42,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:20:42,952 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:20:42,981 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:20:42,981 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:20:42,982 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:20:42,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:20:42,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:20:42,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:20:42,982 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:20:42,982 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:20:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-21 12:20:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:20:43,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:43,013 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] [2020-09-21 12:20:43,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1786760399, now seen corresponding path program 1 times [2020-09-21 12:20:43,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:43,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151286706] [2020-09-21 12:20:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:43,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:43,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:43,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:43,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:20:43,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:20:43,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-09-21 12:20:43,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:20:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:43,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:20:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:43,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:43,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:43,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:20:43,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:43,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:43,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:43,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:43,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:20:43,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:43,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:43,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:43,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:20:43,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:20:43,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-21 12:20:43,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:43,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:20:43,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:43,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:43,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:43,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:20:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:20:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:20:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:20:43,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151286706] [2020-09-21 12:20:43,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:43,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:20:43,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602508663] [2020-09-21 12:20:43,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:20:43,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:20:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:20:43,852 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-21 12:20:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:44,144 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-09-21 12:20:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:20:44,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-21 12:20:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:44,165 INFO L225 Difference]: With dead ends: 79 [2020-09-21 12:20:44,165 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 12:20:44,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:20:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 12:20:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 12:20:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 12:20:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-21 12:20:44,269 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-09-21 12:20:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:44,272 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-21 12:20:44,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:20:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-21 12:20:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:20:44,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:44,276 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] [2020-09-21 12:20:44,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:20:44,276 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash -952976765, now seen corresponding path program 1 times [2020-09-21 12:20:44,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:44,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911453051] [2020-09-21 12:20:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:20:44,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:44,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-21 12:20:44,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:44,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:20:44,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:44,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:44,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:44,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:44,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:20:44,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:44,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:44,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:44,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:44,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:20:44,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:44,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-21 12:20:44,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:20:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:44,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:44,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:20:44,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 12:20:44,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:20:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:20:44,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911453051] [2020-09-21 12:20:44,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:44,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:44,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571933696] [2020-09-21 12:20:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:44,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:44,855 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-09-21 12:20:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:45,211 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-09-21 12:20:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:45,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-21 12:20:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:45,216 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:20:45,216 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:20:45,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:20:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:20:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 12:20:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:45,248 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2020-09-21 12:20:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:45,250 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:45,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:20:45,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:45,253 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] [2020-09-21 12:20:45,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:20:45,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:45,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:45,254 INFO L82 PathProgramCache]: Analyzing trace with hash -494518028, now seen corresponding path program 1 times [2020-09-21 12:20:45,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:45,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137580181] [2020-09-21 12:20:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:20:45,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-21 12:20:45,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:20:45,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:45,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:45,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:20:45,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:45,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 12:20:45,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-21 12:20:45,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:45,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:20:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:45,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:20:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 12:20:45,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:20:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:20:45,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137580181] [2020-09-21 12:20:45,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:45,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:45,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155493123] [2020-09-21 12:20:45,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:45,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:45,636 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 12:20:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:45,903 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 12:20:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:45,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-21 12:20:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:45,905 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:20:45,906 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:20:45,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:20:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:20:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 12:20:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:45,916 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 24 [2020-09-21 12:20:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:45,916 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:45,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:20:45,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:45,918 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] [2020-09-21 12:20:45,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:20:45,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2060037209, now seen corresponding path program 1 times [2020-09-21 12:20:45,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:45,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064956598] [2020-09-21 12:20:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:20:46,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-21 12:20:46,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 12:20:46,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:46,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:46,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:20:46,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:46,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:20:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 12:20:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:20:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:20:46,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 12:20:46,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:20:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:20:46,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064956598] [2020-09-21 12:20:46,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:46,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:46,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421660701] [2020-09-21 12:20:46,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:46,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:46,269 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 12:20:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:46,527 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 12:20:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:46,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 12:20:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:46,529 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:20:46,529 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:20:46,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:20:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:20:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 12:20:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:46,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2020-09-21 12:20:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:46,541 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:46,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:20:46,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:46,543 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] [2020-09-21 12:20:46,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:20:46,544 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1944362408, now seen corresponding path program 1 times [2020-09-21 12:20:46,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:46,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793405916] [2020-09-21 12:20:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:20:46,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-21 12:20:46,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:20:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:46,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:46,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:20:46,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:46,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:46,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:46,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:20:46,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-21 12:20:46,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:20:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:46,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:20:46,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 12:20:46,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:46,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:20:46,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:20:46,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793405916] [2020-09-21 12:20:46,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:46,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:46,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961143112] [2020-09-21 12:20:46,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:46,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:46,907 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 12:20:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:47,136 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 12:20:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:47,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 12:20:47,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:47,138 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:20:47,138 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:20:47,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:20:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:20:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 12:20:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:47,147 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-09-21 12:20:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:47,147 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:47,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:20:47,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:47,149 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] [2020-09-21 12:20:47,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:20:47,149 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash 553653529, now seen corresponding path program 1 times [2020-09-21 12:20:47,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:47,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509021953] [2020-09-21 12:20:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:20:47,167 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:20:47,167 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:20:47,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:20:47,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:20:47 BoogieIcfgContainer [2020-09-21 12:20:47,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:20:47,196 INFO L168 Benchmark]: Toolchain (without parser) took 5362.48 ms. Allocated memory was 146.8 MB in the beginning and 244.3 MB in the end (delta: 97.5 MB). Free memory was 102.0 MB in the beginning and 168.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:47,197 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:20:47,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.60 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 101.3 MB in the beginning and 181.7 MB in the end (delta: -80.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:47,199 INFO L168 Benchmark]: Boogie Preprocessor took 55.55 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:47,200 INFO L168 Benchmark]: RCFGBuilder took 548.44 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 158.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:47,201 INFO L168 Benchmark]: TraceAbstraction took 4286.88 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 157.6 MB in the beginning and 168.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:47,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 456.60 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 101.3 MB in the beginning and 181.7 MB in the end (delta: -80.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.55 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.44 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 158.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4286.88 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 157.6 MB in the beginning and 168.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someUnaryDOUBLEoperation at line 74. Possible FailurePath: [L74] double x = -0.0; [L75] double y = 0.0; [L76] CALL, EXPR fmin_double(x, y) [L46] CALL, EXPR __fpclassify_double(x) [L19] __uint32_t msw, lsw; [L22] ieee_double_shape_type ew_u; [L23] ew_u.value = (x) [L24] EXPR ew_u.parts.msw [L24] (msw) = ew_u.parts.msw [L25] EXPR ew_u.parts.lsw [L25] (lsw) = ew_u.parts.lsw [L28-L29] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L31-L32] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L34-L35] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L38-L39] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L42] return 0; [L46] RET, EXPR __fpclassify_double(x) [L46] COND TRUE __fpclassify_double(x) == 0 [L47] return y; [L76] RET, EXPR fmin_double(x, y) [L76] double res = fmin_double(x, y); [L79] EXPR res == -0.0 && __signbit_double(res) == 1 [L79] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 191 SDslu, 81 SDs, 0 SdLazy, 578 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 7570 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...