/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options 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/float_req_bl_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:56:23,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:56:23,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:56:23,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:56:23,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:56:23,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:56:23,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:56:23,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:56:23,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:56:23,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:56:23,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:56:23,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:56:23,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:56:23,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:56:23,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:56:23,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:56:23,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:56:23,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:56:23,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:56:23,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:56:23,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:56:23,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:56:23,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:56:23,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:56:23,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:56:23,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:56:23,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:56:23,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:56:23,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:56:23,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:56:23,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:56:23,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:56:23,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:56:23,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:56:23,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:56:23,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:56:23,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:56:23,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:56:23,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:56:23,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:56:23,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:56:23,224 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 [2020-09-24 15:56:23,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:56:23,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:56:23,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:56:23,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:56:23,256 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:56:23,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:56:23,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:56:23,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:56:23,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:56:23,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:56:23,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:56:23,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:56:23,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:56:23,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:56:23,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:56:23,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:56:23,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:56:23,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:56:23,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:56:23,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:56:23,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:56:23,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:56:23,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:56:23,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:56:23,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:56:23,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:56:23,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:56:23,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:56:23,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:56:23,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;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; [2020-09-24 15:56:23,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:56:23,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:56:23,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:56:23,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:56:23,757 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:56:23,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-09-24 15:56:23,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffb1c27ab/802f91bfe0854de7b468561b3936d26e/FLAG5b32b9062 [2020-09-24 15:56:24,352 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:56:24,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-09-24 15:56:24,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffb1c27ab/802f91bfe0854de7b468561b3936d26e/FLAG5b32b9062 [2020-09-24 15:56:24,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffb1c27ab/802f91bfe0854de7b468561b3936d26e [2020-09-24 15:56:24,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:56:24,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:56:24,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:56:24,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:56:24,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:56:24,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:56:24" (1/1) ... [2020-09-24 15:56:24,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78523b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:24, skipping insertion in model container [2020-09-24 15:56:24,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:56:24" (1/1) ... [2020-09-24 15:56:24,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:56:24,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:56:25,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:56:25,006 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:56:25,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:56:25,065 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:56:25,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25 WrapperNode [2020-09-24 15:56:25,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:56:25,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:56:25,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:56:25,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:56:25,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (1/1) ... [2020-09-24 15:56:25,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:56:25,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:56:25,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:56:25,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:56:25,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (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 [2020-09-24 15:56:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:56:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:56:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-24 15:56:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-09-24 15:56:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-24 15:56:25,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:56:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:56:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-24 15:56:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 15:56:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:56:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:56:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 15:56:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 15:56:25,719 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:56:25,720 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 15:56:25,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:56:25 BoogieIcfgContainer [2020-09-24 15:56:25,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:56:25,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:56:25,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:56:25,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:56:25,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:56:24" (1/3) ... [2020-09-24 15:56:25,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b5486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:56:25, skipping insertion in model container [2020-09-24 15:56:25,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:25" (2/3) ... [2020-09-24 15:56:25,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b5486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:56:25, skipping insertion in model container [2020-09-24 15:56:25,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:56:25" (3/3) ... [2020-09-24 15:56:25,734 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-09-24 15:56:25,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:56:25,753 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:56:25,772 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:56:25,800 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:56:25,801 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:56:25,801 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:56:25,801 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:56:25,801 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:56:25,802 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:56:25,802 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:56:25,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:56:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-09-24 15:56:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 15:56:25,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:25,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:25,834 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2131665852, now seen corresponding path program 1 times [2020-09-24 15:56:25,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:25,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028601686] [2020-09-24 15:56:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:25,994 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:25,995 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:25,995 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:25,996 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:25,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 15:56:25,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:25,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 15:56:25,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 15:56:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:25,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:26,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,085 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,086 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,086 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,086 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 15:56:26,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:26,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:26,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:26,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:26,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:26,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 15:56:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,142 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,142 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,142 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:26,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 15:56:26,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 15:56:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:26,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:26,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:56:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,180 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,180 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 15:56:26,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 15:56:26,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-24 15:56:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:26,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:26,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028601686] [2020-09-24 15:56:26,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:26,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:56:26,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412709182] [2020-09-24 15:56:26,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:56:26,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:26,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:56:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:56:26,233 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-09-24 15:56:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:26,489 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-09-24 15:56:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:56:26,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-24 15:56:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:26,505 INFO L225 Difference]: With dead ends: 164 [2020-09-24 15:56:26,506 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 15:56:26,511 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 [2020-09-24 15:56:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 15:56:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-24 15:56:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 15:56:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-24 15:56:26,580 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 34 [2020-09-24 15:56:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:26,581 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-24 15:56:26,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:56:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-24 15:56:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 15:56:26,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:26,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:26,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:56:26,587 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash -630897281, now seen corresponding path program 1 times [2020-09-24 15:56:26,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:26,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350863645] [2020-09-24 15:56:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,687 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,687 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,688 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,688 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 15:56:26,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 15:56:26,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-24 15:56:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:26,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:26,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,745 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,746 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,746 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,746 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 15:56:26,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:26,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:26,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 15:56:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,804 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,804 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,805 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,805 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 15:56:26,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 15:56:26,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 15:56:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:26,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:26,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:56:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:26,886 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:26,887 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:26,890 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:26,890 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:26,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 15:56:26,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:26,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 15:56:26,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 15:56:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:26,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350863645] [2020-09-24 15:56:26,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:26,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:56:26,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230586486] [2020-09-24 15:56:26,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:56:26,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:56:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:56:26,928 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2020-09-24 15:56:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:27,140 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-09-24 15:56:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:56:27,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-09-24 15:56:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:27,144 INFO L225 Difference]: With dead ends: 117 [2020-09-24 15:56:27,145 INFO L226 Difference]: Without dead ends: 86 [2020-09-24 15:56:27,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:56:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-24 15:56:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-24 15:56:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 15:56:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-24 15:56:27,161 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 43 [2020-09-24 15:56:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:27,162 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-24 15:56:27,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:56:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-24 15:56:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 15:56:27,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:27,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:27,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:56:27,164 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1020330010, now seen corresponding path program 1 times [2020-09-24 15:56:27,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:27,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223315412] [2020-09-24 15:56:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,193 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,196 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,196 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 15:56:27,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 15:56:27,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-24 15:56:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:27,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:27,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,249 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,249 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,249 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,249 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:27,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 15:56:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,282 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,282 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,282 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,282 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 15:56:27,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 15:56:27,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 15:56:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:27,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:27,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:56:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,317 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,317 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,317 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,318 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 15:56:27,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:27,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 15:56:27,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:27,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223315412] [2020-09-24 15:56:27,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:27,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:56:27,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675561925] [2020-09-24 15:56:27,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:56:27,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:56:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:56:27,345 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-24 15:56:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:27,535 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-24 15:56:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:56:27,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-09-24 15:56:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:27,538 INFO L225 Difference]: With dead ends: 121 [2020-09-24 15:56:27,538 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 15:56:27,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:56:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 15:56:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-24 15:56:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 15:56:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-24 15:56:27,552 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 44 [2020-09-24 15:56:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:27,552 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-24 15:56:27,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:56:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-24 15:56:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 15:56:27,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:27,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:27,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:56:27,555 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1154617628, now seen corresponding path program 1 times [2020-09-24 15:56:27,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:27,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045250440] [2020-09-24 15:56:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,580 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,580 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,580 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,581 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 15:56:27,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 15:56:27,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 15:56:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,614 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,615 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,615 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,615 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 15:56:27,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:27,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:27,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:27,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 15:56:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,644 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,645 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,645 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 15:56:27,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:27,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 15:56:27,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:27,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:27,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:56:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,686 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,686 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,686 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,687 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:27,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:27,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:27,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045250440] [2020-09-24 15:56:27,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:27,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:56:27,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772746966] [2020-09-24 15:56:27,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:56:27,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:56:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:56:27,719 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-24 15:56:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:27,921 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-24 15:56:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:56:27,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-09-24 15:56:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:27,923 INFO L225 Difference]: With dead ends: 121 [2020-09-24 15:56:27,924 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 15:56:27,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:56:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 15:56:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-24 15:56:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 15:56:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-24 15:56:27,934 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 45 [2020-09-24 15:56:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:27,934 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-24 15:56:27,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:56:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-24 15:56:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 15:56:27,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:27,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:27,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:56:27,937 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1681903777, now seen corresponding path program 1 times [2020-09-24 15:56:27,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:27,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607275486] [2020-09-24 15:56:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,957 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,957 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,957 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,957 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 15:56:27,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:27,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:27,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 15:56:27,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:27,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:27,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:27,986 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:27,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:27,986 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:27,986 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:27,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 15:56:27,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:27,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:27,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:28,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 15:56:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:28,019 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:28,020 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:28,020 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:28,020 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:28,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 15:56:28,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:28,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:28,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 15:56:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:28,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:28,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:56:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:28,063 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:28,063 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:28,063 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:28,063 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:28,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 15:56:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 15:56:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:28,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607275486] [2020-09-24 15:56:28,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:28,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:56:28,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508412434] [2020-09-24 15:56:28,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:56:28,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:56:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:56:28,091 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-24 15:56:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:28,272 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-24 15:56:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:56:28,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-24 15:56:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:28,274 INFO L225 Difference]: With dead ends: 121 [2020-09-24 15:56:28,274 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 15:56:28,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:56:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 15:56:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-24 15:56:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 15:56:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-24 15:56:28,285 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 46 [2020-09-24 15:56:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:28,285 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-24 15:56:28,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:56:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-24 15:56:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 15:56:28,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:28,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:28,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:56:28,287 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash -969429089, now seen corresponding path program 1 times [2020-09-24 15:56:28,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:28,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058183032] [2020-09-24 15:56:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:56:28,310 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:56:28,310 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:56:28,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:56:28,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:56:28 BoogieIcfgContainer [2020-09-24 15:56:28,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:56:28,339 INFO L168 Benchmark]: Toolchain (without parser) took 3621.77 ms. Allocated memory was 139.5 MB in the beginning and 246.9 MB in the end (delta: 107.5 MB). Free memory was 100.8 MB in the beginning and 138.7 MB in the end (delta: -37.9 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:28,340 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:56:28,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.15 ms. Allocated memory is still 139.5 MB. Free memory was 100.2 MB in the beginning and 89.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:28,342 INFO L168 Benchmark]: Boogie Preprocessor took 127.33 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 89.4 MB in the beginning and 179.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:28,343 INFO L168 Benchmark]: RCFGBuilder took 531.71 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 155.8 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:28,344 INFO L168 Benchmark]: TraceAbstraction took 2609.62 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 155.2 MB in the beginning and 138.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:28,347 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 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.15 ms. Allocated memory is still 139.5 MB. Free memory was 100.2 MB in the beginning and 89.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.33 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 89.4 MB in the beginning and 179.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 531.71 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 155.8 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2609.62 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 155.2 MB in the beginning and 138.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 72. Possible FailurePath: [L72] float x = -0.0f; [L73] float y = 0.0f; [L75] CALL, EXPR fmax_float(x, y) [L43] CALL, EXPR __fpclassify_float(x) [L20] __uint32_t w; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (w) = gf_u.word [L28] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L30-L31] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L33-L34] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L36] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L39] return 0; [L43] RET, EXPR __fpclassify_float(x) [L43] COND TRUE __fpclassify_float(x) == 0 [L44] return y; [L75] RET, EXPR fmax_float(x, y) [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 89 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 447 SDtfs, 89 SDslu, 928 SDs, 0 SdLazy, 622 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 207 ConstructedInterpolants, 0 QuantifiedInterpolants, 16886 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...