/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_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:20:41,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:20:41,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:20:41,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:20:41,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:20:41,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:20:41,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:20:41,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:20:41,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:20:41,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:20:41,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:20:41,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:20:41,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:20:41,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:20:41,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:20:41,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:20:41,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:20:41,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:20:41,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:20:41,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:20:41,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:20:41,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:20:41,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:20:41,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:20:41,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:20:41,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:20:41,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:20:41,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:20:41,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:20:41,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:20:41,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:20:41,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:20:41,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:20:41,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:20:41,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:20:41,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:20:41,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:20:41,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:20:41,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:20:41,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:20:41,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:20:41,381 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 12:20:41,408 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:20:41,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:20:41,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:20:41,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:20:41,410 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:20:41,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:20:41,411 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:20:41,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:20:41,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:20:41,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:20:41,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:20:41,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:20:41,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:20:41,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:20:41,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:20:41,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:20:41,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:20:41,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:20:41,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:20:41,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:20:41,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:20:41,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:20:41,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:20:41,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:20:41,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:20:41,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:20:41,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:20:41,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:20:41,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:20:41,416 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 12:20:41,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:20:41,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:20:41,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:20:41,943 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:20:41,945 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:20:41,947 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252a.c [2020-09-21 12:20:42,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe0038045/f50fc4135f144a6c875dcea0dade4056/FLAGda579600e [2020-09-21 12:20:42,581 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:20:42,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1252a.c [2020-09-21 12:20:42,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe0038045/f50fc4135f144a6c875dcea0dade4056/FLAGda579600e [2020-09-21 12:20:42,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe0038045/f50fc4135f144a6c875dcea0dade4056 [2020-09-21 12:20:42,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:20:42,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:20:42,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:20:42,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:20:42,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:20:42,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448d4077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:42, skipping insertion in model container [2020-09-21 12:20:42,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:20:42" (1/1) ... [2020-09-21 12:20:42,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:20:42,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:20:43,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:20:43,244 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:20:43,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:20:43,404 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:20:43,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43 WrapperNode [2020-09-21 12:20:43,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:20:43,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:20:43,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:20:43,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:20:43,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (1/1) ... [2020-09-21 12:20:43,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:20:43,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:20:43,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:20:43,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:20:43,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (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 12:20:43,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:20:43,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:20:43,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2020-09-21 12:20:43,555 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2020-09-21 12:20:43,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-09-21 12:20:43,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:20:43,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:20:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-21 12:20:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2020-09-21 12:20:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:20:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 12:20:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:20:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:20:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2020-09-21 12:20:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-09-21 12:20:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:20:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:20:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:20:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 12:20:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:20:43,962 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:20:43,962 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 12:20:43,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:20:43 BoogieIcfgContainer [2020-09-21 12:20:43,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:20:43,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:20:43,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:20:43,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:20:43,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:20:42" (1/3) ... [2020-09-21 12:20:43,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e68e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:20:43, skipping insertion in model container [2020-09-21 12:20:43,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:20:43" (2/3) ... [2020-09-21 12:20:43,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e68e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:20:43, skipping insertion in model container [2020-09-21 12:20:43,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:20:43" (3/3) ... [2020-09-21 12:20:43,977 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252a.c [2020-09-21 12:20:43,987 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:20:43,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:20:44,017 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:20:44,044 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:20:44,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:20:44,045 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:20:44,045 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:20:44,045 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:20:44,045 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:20:44,045 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:20:44,045 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:20:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-21 12:20:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:20:44,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:44,076 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 12:20:44,077 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash -592398611, now seen corresponding path program 1 times [2020-09-21 12:20:44,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:44,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139050059] [2020-09-21 12:20:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:20:44,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:20:44,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-09-21 12:20:44,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:20:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:44,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:20:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:44,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:20:44,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:44,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:44,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:44,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:44,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:20:44,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:20:44,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 12:20:44,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:20:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:44,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:44,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:44,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:44,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:44,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:20:44,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:20:44,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:20:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:20:44,913 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 12:20:44,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139050059] [2020-09-21 12:20:44,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:44,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:20:44,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81188860] [2020-09-21 12:20:44,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:20:44,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:20:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:20:44,950 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-21 12:20:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:45,210 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-09-21 12:20:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:20:45,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-21 12:20:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:45,227 INFO L225 Difference]: With dead ends: 79 [2020-09-21 12:20:45,228 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 12:20:45,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:20:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 12:20:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 12:20:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 12:20:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-21 12:20:45,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-09-21 12:20:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:45,302 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-21 12:20:45,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:20:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-21 12:20:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:20:45,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:45,306 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 12:20:45,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:20:45,306 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:45,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1646954013, now seen corresponding path program 1 times [2020-09-21 12:20:45,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:45,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956105046] [2020-09-21 12:20:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:20:45,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-09-21 12:20:45,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:20:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:45,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:45,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:45,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:20:45,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:45,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:20:45,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-21 12:20:45,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:20:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:45,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:45,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:45,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:45,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:45,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:20:45,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:45,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-21 12:20:45,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:20:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:45,810 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 12:20:45,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956105046] [2020-09-21 12:20:45,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:45,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:45,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778532998] [2020-09-21 12:20:45,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:45,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:45,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:45,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:45,815 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-09-21 12:20:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:46,077 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-09-21 12:20:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:46,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-21 12:20:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:46,081 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:20:46,082 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:20:46,083 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 12:20:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:20:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 12:20:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:46,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2020-09-21 12:20:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:46,098 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:46,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:20:46,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:46,100 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 12:20:46,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:20:46,100 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash 402536752, now seen corresponding path program 1 times [2020-09-21 12:20:46,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:46,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655584171] [2020-09-21 12:20:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:20:46,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [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 12:20:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:20:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:46,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:20:46,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 12:20:46,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-21 12:20:46,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:20:46,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-21 12:20:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:46,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:46,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:20:46,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-21 12:20:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:20:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:46,560 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 12:20:46,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655584171] [2020-09-21 12:20:46,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:46,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:46,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340145463] [2020-09-21 12:20:46,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:46,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:46,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:46,565 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 12:20:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:46,875 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 12:20:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:46,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-21 12:20:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:46,878 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:20:46,878 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:20:46,879 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 12:20:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:20:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 12:20:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:46,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 24 [2020-09-21 12:20:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:46,890 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:46,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:20:46,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:46,891 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 12:20:46,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:20:46,892 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash 914370183, now seen corresponding path program 1 times [2020-09-21 12:20:46,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:46,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581596010] [2020-09-21 12:20:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:20:47,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-21 12:20:47,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 12:20:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:47,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:20:47,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:47,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:47,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:47,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:20:47,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-21 12:20:47,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:20:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:47,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:47,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:20:47,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 12:20:47,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:47,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:47,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:20:47,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:47,232 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 12:20:47,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581596010] [2020-09-21 12:20:47,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:47,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:47,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836063679] [2020-09-21 12:20:47,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:47,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:47,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:47,235 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 12:20:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:47,464 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 12:20:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:47,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 12:20:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:47,467 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:20:47,467 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:20:47,467 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 12:20:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:20:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 12:20:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:47,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2020-09-21 12:20:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:47,477 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:47,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:20:47,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:47,479 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 12:20:47,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:20:47,480 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1003466516, now seen corresponding path program 1 times [2020-09-21 12:20:47,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:47,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684271108] [2020-09-21 12:20:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:20:47,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-21 12:20:47,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:20:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:47,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:20:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:20:47,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:20:47,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:20:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:20:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:20:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:20:47,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 12:20:47,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:47,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:20:47,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:20:47,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:20:47,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:20:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:20:47,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:20:47,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:20:47,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:20:47,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:20:47,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-21 12:20:47,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:20:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:20:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:20:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:20:47,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:20:47,875 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 12:20:47,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684271108] [2020-09-21 12:20:47,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:20:47,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:20:47,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772599484] [2020-09-21 12:20:47,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:20:47,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:20:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:20:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:20:47,879 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 12:20:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:20:48,102 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 12:20:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:20:48,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 12:20:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:20:48,104 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:20:48,104 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:20:48,106 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 12:20:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:20:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 12:20:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:20:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 12:20:48,118 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-09-21 12:20:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:20:48,119 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 12:20:48,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:20:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 12:20:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:20:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:20:48,125 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 12:20:48,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:20:48,125 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:20:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:20:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash -793484843, now seen corresponding path program 1 times [2020-09-21 12:20:48,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:20:48,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691859259] [2020-09-21 12:20:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:20:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:20:48,148 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:20:48,149 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:20:48,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:20:48,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:20:48 BoogieIcfgContainer [2020-09-21 12:20:48,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:20:48,184 INFO L168 Benchmark]: Toolchain (without parser) took 5248.92 ms. Allocated memory was 140.0 MB in the beginning and 246.4 MB in the end (delta: 106.4 MB). Free memory was 103.3 MB in the beginning and 175.4 MB in the end (delta: -72.1 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:48,186 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-21 12:20:48,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.17 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 182.0 MB in the end (delta: -79.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:48,193 INFO L168 Benchmark]: Boogie Preprocessor took 56.28 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 179.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:48,194 INFO L168 Benchmark]: RCFGBuilder took 505.79 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 158.8 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:48,195 INFO L168 Benchmark]: TraceAbstraction took 4210.72 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 158.8 MB in the beginning and 175.4 MB in the end (delta: -16.6 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:20:48,209 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 463.17 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 182.0 MB in the end (delta: -79.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.28 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 179.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 505.79 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 158.8 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4210.72 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 158.8 MB in the beginning and 175.4 MB in the end (delta: -16.6 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 85]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 84, overapproximation of someUnaryDOUBLEoperation at line 79. Possible FailurePath: [L79] double x = -0.0; [L80] double y = 0.0; [L81] CALL, EXPR fmax_double(x, y) [L52] CALL, EXPR __fpclassify_double(x) [L24] __uint32_t msw, lsw; [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (msw) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lsw) = ew_u.parts.lsw [L33-L34] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L36-L37] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L39-L40] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L43-L44] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L47] return 0; [L52] RET, EXPR __fpclassify_double(x) [L52] COND TRUE __fpclassify_double(x) == 0 [L53] return y; [L81] RET, EXPR fmax_double(x, y) [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.3s, 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, 0.7s 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: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s 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...