/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 interpolation-heuristic=FIRST --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 11:18:47,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:18:47,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:18:47,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:18:47,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:18:47,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:18:47,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:18:47,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:18:47,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:18:47,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:18:47,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:18:47,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:18:47,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:18:47,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:18:47,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:18:47,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:18:47,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:18:47,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:18:47,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:18:47,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:18:47,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:18:47,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:18:47,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:18:47,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:18:47,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:18:47,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:18:47,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:18:47,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:18:47,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:18:47,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:18:47,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:18:47,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:18:47,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:18:47,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:18:47,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:18:47,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:18:47,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:18:47,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:18:47,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:18:47,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:18:47,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:18:47,343 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 11:18:47,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:18:47,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:18:47,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:18:47,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:18:47,396 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:18:47,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:18:47,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:18:47,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:18:47,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:18:47,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:18:47,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:18:47,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:18:47,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:18:47,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:18:47,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:18:47,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:18:47,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:18:47,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:18:47,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:18:47,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:18:47,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:18:47,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:18:47,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:18:47,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:18:47,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:18:47,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:18:47,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:18:47,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:18:47,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:18:47,403 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:18:47,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:18:47,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:18:47,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:18:47,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:18:47,957 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:18:47,958 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1232b.c [2020-09-21 11:18:48,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e38ce76/31a10aae9c7a4e72bcb1f185ad20d3f9/FLAG423f839a7 [2020-09-21 11:18:48,590 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:18:48,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1232b.c [2020-09-21 11:18:48,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e38ce76/31a10aae9c7a4e72bcb1f185ad20d3f9/FLAG423f839a7 [2020-09-21 11:18:48,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e38ce76/31a10aae9c7a4e72bcb1f185ad20d3f9 [2020-09-21 11:18:48,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:18:48,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:18:48,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:18:48,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:18:48,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:18:48,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:18:48" (1/1) ... [2020-09-21 11:18:48,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:48, skipping insertion in model container [2020-09-21 11:18:48,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:18:48" (1/1) ... [2020-09-21 11:18:48,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:18:49,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:18:49,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:18:49,275 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:18:49,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:18:49,352 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:18:49,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49 WrapperNode [2020-09-21 11:18:49,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:18:49,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:18:49,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:18:49,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:18:49,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (1/1) ... [2020-09-21 11:18:49,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:18:49,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:18:49,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:18:49,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:18:49,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (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 11:18:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:18:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:18:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-09-21 11:18:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2020-09-21 11:18:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_double [2020-09-21 11:18:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-09-21 11:18:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:18:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:18:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-21 11:18:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-09-21 11:18:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2020-09-21 11:18:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:18:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 11:18:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:18:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:18:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_double [2020-09-21 11:18:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-09-21 11:18:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:18:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:18:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:18:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:18:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 11:18:49,977 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:18:49,977 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 11:18:49,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:18:49 BoogieIcfgContainer [2020-09-21 11:18:49,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:18:49,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:18:49,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:18:49,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:18:49,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:18:48" (1/3) ... [2020-09-21 11:18:49,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfba395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:18:49, skipping insertion in model container [2020-09-21 11:18:49,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:18:49" (2/3) ... [2020-09-21 11:18:49,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfba395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:18:49, skipping insertion in model container [2020-09-21 11:18:49,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:18:49" (3/3) ... [2020-09-21 11:18:49,996 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2020-09-21 11:18:50,031 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:18:50,054 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:18:50,088 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:18:50,116 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:18:50,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:18:50,117 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:18:50,117 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:18:50,117 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:18:50,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:18:50,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:18:50,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:18:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-21 11:18:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:18:50,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:18:50,153 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 11:18:50,154 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:18:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:18:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1786760399, now seen corresponding path program 1 times [2020-09-21 11:18:50,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:18:50,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454325939] [2020-09-21 11:18:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:18:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:50,346 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:50,347 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:50,347 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:50,347 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:50,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:18:50,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:50,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:18:50,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:18:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:50,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:50,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:18:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:50,434 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:50,434 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:50,434 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:50,435 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:50,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:18:50,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:50,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:18:50,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:50,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:18:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:50,478 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:50,478 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:50,478 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:50,479 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:50,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:18:50,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:50,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:18:50,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:18:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:50,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:50,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:18:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:50,501 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:50,501 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:50,502 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:50,502 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:50,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:18:50,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:50,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:18:50,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:50,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:18:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:50,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:50,516 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 11:18:50,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454325939] [2020-09-21 11:18:50,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:18:50,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:18:50,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928690208] [2020-09-21 11:18:50,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:18:50,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:18:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:18:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:18:50,554 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-21 11:18:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:18:50,840 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-09-21 11:18:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:18:50,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-21 11:18:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:18:50,857 INFO L225 Difference]: With dead ends: 79 [2020-09-21 11:18:50,858 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:18:50,863 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 11:18:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:18:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 11:18:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:18:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-21 11:18:50,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-09-21 11:18:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:18:50,931 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-21 11:18:50,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:18:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-21 11:18:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:18:50,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:18:50,935 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 11:18:50,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:18:50,938 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:18:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:18:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -952976765, now seen corresponding path program 1 times [2020-09-21 11:18:50,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:18:50,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674499794] [2020-09-21 11:18:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:18:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,025 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,025 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,026 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,026 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:18:51,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:18:51,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:18:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:51,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:18:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,107 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,107 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,107 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,108 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:18:51,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:18:51,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:51,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:51,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:18:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,196 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,197 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,197 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:18:51,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:18:51,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 11:18:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:51,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:51,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:18:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,261 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,262 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,262 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,262 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:18:51,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:18:51,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:18:51,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:51,313 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 11:18:51,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674499794] [2020-09-21 11:18:51,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:18:51,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:18:51,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11345725] [2020-09-21 11:18:51,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:18:51,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:18:51,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:18:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:18:51,318 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-09-21 11:18:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:18:51,587 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-09-21 11:18:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:18:51,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-21 11:18:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:18:51,592 INFO L225 Difference]: With dead ends: 59 [2020-09-21 11:18:51,592 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:18:51,594 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 11:18:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:18:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 11:18:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:18:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:18:51,609 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2020-09-21 11:18:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:18:51,610 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:18:51,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:18:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:18:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:18:51,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:18:51,612 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 11:18:51,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:18:51,612 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:18:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:18:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash -494518028, now seen corresponding path program 1 times [2020-09-21 11:18:51,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:18:51,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41142924] [2020-09-21 11:18:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:18:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,659 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,660 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:18:51,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:18:51,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 11:18:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:51,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:18:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,718 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,719 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,720 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:18:51,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:18:51,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:18:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,802 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,802 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,808 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,808 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:18:51,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:18:51,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:18:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:51,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:18:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:18:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:51,853 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:51,853 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:51,854 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:51,854 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:51,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 11:18:51,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:51,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:18:51,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:51,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:51,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:18:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:51,877 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 11:18:51,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41142924] [2020-09-21 11:18:51,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:18:51,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:18:51,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597027622] [2020-09-21 11:18:51,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:18:51,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:18:51,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:18:51,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:18:51,880 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 11:18:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:18:52,122 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 11:18:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:18:52,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-21 11:18:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:18:52,124 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:18:52,124 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:18:52,125 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 11:18:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:18:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:18:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:18:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:18:52,136 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 24 [2020-09-21 11:18:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:18:52,136 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:18:52,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:18:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:18:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:18:52,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:18:52,138 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 11:18:52,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:18:52,139 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:18:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:18:52,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2060037209, now seen corresponding path program 1 times [2020-09-21 11:18:52,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:18:52,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279358705] [2020-09-21 11:18:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:18:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,162 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,162 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,162 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,163 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:18:52,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:18:52,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:52,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:18:52,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:52,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:18:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,190 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,191 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,191 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,191 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:18:52,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:18:52,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:52,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:18:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,229 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,229 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,229 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,230 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:18:52,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:18:52,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:18:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:52,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:52,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:18:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,266 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,266 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,267 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,267 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 11:18:52,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:18:52,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:52,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:52,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:18:52,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:18:52,290 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 11:18:52,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279358705] [2020-09-21 11:18:52,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:18:52,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:18:52,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701165402] [2020-09-21 11:18:52,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:18:52,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:18:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:18:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:18:52,293 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 11:18:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:18:52,562 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 11:18:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:18:52,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 11:18:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:18:52,564 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:18:52,564 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:18:52,565 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 11:18:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:18:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:18:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:18:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:18:52,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2020-09-21 11:18:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:18:52,575 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:18:52,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:18:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:18:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:18:52,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:18:52,577 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 11:18:52,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:18:52,577 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:18:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:18:52,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1944362408, now seen corresponding path program 1 times [2020-09-21 11:18:52,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:18:52,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113685176] [2020-09-21 11:18:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:18:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,601 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,601 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:18:52,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:18:52,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 11:18:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:52,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:52,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:18:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,626 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,626 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,626 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,627 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:18:52,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:18:52,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:18:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:18:52,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:18:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,660 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,661 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,661 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:18:52,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:18:52,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:52,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:18:52,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:18:52,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:52,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:18:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:18:52,696 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:18:52,696 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:18:52,697 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:18:52,697 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:18:52,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 11:18:52,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:18:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:18:52,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:18:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:18:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:18:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:18:52,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:18:52,716 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 11:18:52,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113685176] [2020-09-21 11:18:52,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:18:52,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:18:52,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659852752] [2020-09-21 11:18:52,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:18:52,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:18:52,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:18:52,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:18:52,718 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 11:18:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:18:52,938 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 11:18:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:18:52,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 11:18:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:18:52,940 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:18:52,940 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:18:52,941 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 11:18:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:18:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:18:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:18:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:18:52,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-09-21 11:18:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:18:52,949 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:18:52,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:18:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:18:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:18:52,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:18:52,951 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 11:18:52,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:18:52,951 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:18:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:18:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash 553653529, now seen corresponding path program 1 times [2020-09-21 11:18:52,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:18:52,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671112703] [2020-09-21 11:18:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:18:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:18:52,975 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:18:52,975 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:18:52,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:18:53,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:18:53 BoogieIcfgContainer [2020-09-21 11:18:53,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:18:53,005 INFO L168 Benchmark]: Toolchain (without parser) took 4042.37 ms. Allocated memory was 146.8 MB in the beginning and 243.3 MB in the end (delta: 96.5 MB). Free memory was 101.6 MB in the beginning and 140.2 MB in the end (delta: -38.6 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:18:53,006 INFO L168 Benchmark]: CDTParser took 0.82 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 11:18:53,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.12 ms. Allocated memory is still 146.8 MB. Free memory was 100.9 MB in the beginning and 89.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:18:53,008 INFO L168 Benchmark]: Boogie Preprocessor took 176.48 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 181.7 MB in the end (delta: -92.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:18:53,009 INFO L168 Benchmark]: RCFGBuilder took 453.37 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 160.4 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:18:53,009 INFO L168 Benchmark]: TraceAbstraction took 3014.65 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 159.8 MB in the beginning and 140.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:18:53,013 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 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 382.12 ms. Allocated memory is still 146.8 MB. Free memory was 100.9 MB in the beginning and 89.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 176.48 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 181.7 MB in the end (delta: -92.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.37 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 160.4 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3014.65 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 159.8 MB in the beginning and 140.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 58.4 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: 2.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 189 SDslu, 81 SDs, 0 SdLazy, 595 SolverSat, 78 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, 0.9s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 7202 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...