/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/interpolation2.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:23:20,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:23:20,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:23:20,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:23:20,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:23:20,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:23:20,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:23:20,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:23:20,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:23:20,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:23:20,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:23:20,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:23:20,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:23:20,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:23:20,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:23:20,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:23:20,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:23:20,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:23:20,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:23:20,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:23:20,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:23:20,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:23:20,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:23:20,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:23:20,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:23:20,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:23:20,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:23:20,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:23:20,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:23:20,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:23:20,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:23:20,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:23:20,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:23:20,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:23:20,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:23:20,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:23:20,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:23:20,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:23:20,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:23:20,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:23:20,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:23:20,176 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 [2020-10-28 14:23:20,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:23:20,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:23:20,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:23:20,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:23:20,232 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:23:20,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:23:20,233 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:23:20,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:23:20,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:23:20,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:23:20,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:23:20,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:23:20,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:23:20,236 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:23:20,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:23:20,236 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:23:20,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:23:20,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:23:20,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:23:20,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:23:20,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:23:20,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:23:20,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:23:20,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:23:20,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:23:20,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:23:20,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:23:20,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:23:20,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:23:20,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:23:20,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:23:20,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:23:20,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:23:20,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:23:20,701 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:23:20,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/interpolation2.c.p+cfa-reducer.c [2020-10-28 14:23:20,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2963604dd/15c7ce28dc5a413780ad293f6d740545/FLAGe010a2c8c [2020-10-28 14:23:21,535 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:23:21,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/interpolation2.c.p+cfa-reducer.c [2020-10-28 14:23:21,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2963604dd/15c7ce28dc5a413780ad293f6d740545/FLAGe010a2c8c [2020-10-28 14:23:21,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2963604dd/15c7ce28dc5a413780ad293f6d740545 [2020-10-28 14:23:21,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:23:21,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:23:21,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:21,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:23:21,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:23:21,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:21" (1/1) ... [2020-10-28 14:23:21,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59873b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:21, skipping insertion in model container [2020-10-28 14:23:21,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:21" (1/1) ... [2020-10-28 14:23:21,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:23:21,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:23:22,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:22,096 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:23:22,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:22,160 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:23:22,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22 WrapperNode [2020-10-28 14:23:22,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:22,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:23:22,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:23:22,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:23:22,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (1/1) ... [2020-10-28 14:23:22,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:23:22,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:23:22,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:23:22,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:23:22,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (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 [2020-10-28 14:23:22,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:23:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:23:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:23:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:23:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:23:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:23:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:23:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-28 14:23:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-28 14:23:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:23:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:23:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:23:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:23:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:23:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:23:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-28 14:23:22,758 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:23:22,758 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:23:22,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:22 BoogieIcfgContainer [2020-10-28 14:23:22,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:23:22,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:23:22,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:23:22,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:23:22,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:23:21" (1/3) ... [2020-10-28 14:23:22,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c859d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:22, skipping insertion in model container [2020-10-28 14:23:22,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:22" (2/3) ... [2020-10-28 14:23:22,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c859d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:22, skipping insertion in model container [2020-10-28 14:23:22,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:22" (3/3) ... [2020-10-28 14:23:22,788 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c.p+cfa-reducer.c [2020-10-28 14:23:22,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:23:22,830 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:23:22,845 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:23:22,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:23:22,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:23:22,876 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:23:22,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:23:22,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:23:22,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:23:22,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:23:22,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:23:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-28 14:23:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:23:22,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:22,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:22,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash 831822590, now seen corresponding path program 1 times [2020-10-28 14:23:22,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:22,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504292218] [2020-10-28 14:23:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:23,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:23,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:23,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:23,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:23,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:23:23,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:23:23,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-28 14:23:23,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:23,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:23,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:23:23,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:23:23,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:23:23,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:23:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:23,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:23,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:23,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:23,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:23:23,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:23,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:23,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:23,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:23,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504292218] [2020-10-28 14:23:23,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:23,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:23:23,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969640810] [2020-10-28 14:23:23,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:23:23,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:23:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:23:24,006 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-10-28 14:23:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:24,135 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-28 14:23:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:23:24,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 14:23:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:24,147 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:23:24,148 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:23:24,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:23:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:23:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:23:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:23:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-28 14:23:24,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2020-10-28 14:23:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:24,212 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-28 14:23:24,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:23:24,213 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-28 14:23:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:23:24,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:24,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:24,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:23:24,214 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1300047737, now seen corresponding path program 1 times [2020-10-28 14:23:24,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:24,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192002223] [2020-10-28 14:23:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:24,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:24,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:24,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:23:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:23:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 14:23:24,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:24,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:23:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:23:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:23:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:24,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:24,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:24,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:24,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:24,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:23:24,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:24,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:24,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:23:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:24,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192002223] [2020-10-28 14:23:24,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:24,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:23:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468247061] [2020-10-28 14:23:24,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:23:24,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:23:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:24,496 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2020-10-28 14:23:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:24,580 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-28 14:23:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:23:24,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 14:23:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:24,583 INFO L225 Difference]: With dead ends: 33 [2020-10-28 14:23:24,583 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:23:24,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:23:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:23:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:23:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-28 14:23:24,594 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-28 14:23:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:24,594 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-28 14:23:24,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:23:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-28 14:23:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:23:24,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:24,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:24,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:23:24,597 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1822550740, now seen corresponding path program 1 times [2020-10-28 14:23:24,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:24,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679667731] [2020-10-28 14:23:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:24,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:24,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:24,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:23:24,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:24,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-28 14:23:24,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:24,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:24,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:23:24,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:23:24,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:23:24,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:24,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:24,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:24,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:24,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:24,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:23:24,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:24,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:24,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:23:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679667731] [2020-10-28 14:23:24,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:24,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:23:24,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217341327] [2020-10-28 14:23:24,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:23:24,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:23:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:24,787 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-28 14:23:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:24,844 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 14:23:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:23:24,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 14:23:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:24,847 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:23:24,847 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:23:24,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:23:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-28 14:23:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:23:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 14:23:24,855 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-28 14:23:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:24,855 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 14:23:24,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:23:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 14:23:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:23:24,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:24,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:24,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:23:24,857 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash 925718154, now seen corresponding path program 1 times [2020-10-28 14:23:24,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:24,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965322356] [2020-10-28 14:23:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:23:24,870 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:23:24,870 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:23:24,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:23:24,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:23:24 BoogieIcfgContainer [2020-10-28 14:23:24,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:23:24,893 INFO L168 Benchmark]: Toolchain (without parser) took 3031.23 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 63.6 MB in the end (delta: 64.2 MB). Peak memory consumption was 64.9 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:24,894 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 153.1 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:23:24,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.81 ms. Allocated memory is still 153.1 MB. Free memory was 127.2 MB in the beginning and 116.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:24,896 INFO L168 Benchmark]: Boogie Preprocessor took 52.81 ms. Allocated memory is still 153.1 MB. Free memory was 116.6 MB in the beginning and 114.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:24,897 INFO L168 Benchmark]: RCFGBuilder took 546.01 ms. Allocated memory is still 153.1 MB. Free memory was 114.8 MB in the beginning and 130.7 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:24,897 INFO L168 Benchmark]: TraceAbstraction took 2121.09 ms. Allocated memory is still 153.1 MB. Free memory was 130.0 MB in the beginning and 63.6 MB in the end (delta: 66.4 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:24,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 153.1 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.81 ms. Allocated memory is still 153.1 MB. Free memory was 127.2 MB in the beginning and 116.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.81 ms. Allocated memory is still 153.1 MB. Free memory was 116.6 MB in the beginning and 114.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 546.01 ms. Allocated memory is still 153.1 MB. Free memory was 114.8 MB in the beginning and 130.7 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2121.09 ms. Allocated memory is still 153.1 MB. Free memory was 130.0 MB in the beginning and 63.6 MB in the end (delta: 66.4 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 35, overapproximation of someBinaryDOUBLEComparisonOperation at line 40, overapproximation of to_real at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L1] int __return_main; [L14] int main__i; [L15] float main__z; [L16] float main__t; [L17] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__org[5] = { 1, 5, -10, 30, 20 }; [L20] float main__slope[5] = { 4, -15, 40, -10, 0 }; [L21] main__t = __VERIFIER_nondet_float() [L22] int main____CPAchecker_TMP_0; [L23] EXPR main__min[0] [L23] COND TRUE main__t >= (main__min[0]) [L25] EXPR main__max[4UL] [L25] COND TRUE main__t <= (main__max[4UL]) [L27] main____CPAchecker_TMP_0 = 1 [L29] COND TRUE main____CPAchecker_TMP_0 != 0 [L31] main__i = 0 [L33] COND TRUE main__i < 5UL [L35] EXPR main__max[main__i] [L35] COND TRUE main__t <= (main__max[main__i]) [L38] EXPR main__org[main__i] [L38] EXPR main__slope[main__i] [L38] EXPR main__min[main__i] [L38] EXPR main__max[main__i] [L38] EXPR main__min[main__i] [L38] main__z = (main__org[main__i]) + (((main__slope[main__i]) * (main__t - (main__min[main__i]))) / ((main__max[main__i]) - (main__min[main__i]))) [L39] int main____CPAchecker_TMP_1; [L40] COND FALSE !(main__z >= -10.0) [L65] main____CPAchecker_TMP_1 = 0 [L47] int __tmp_1; [L48] __tmp_1 = main____CPAchecker_TMP_1 [L49] int __VERIFIER_assert__cond; [L50] __VERIFIER_assert__cond = __tmp_1 [L51] COND TRUE __VERIFIER_assert__cond == 0 [L53] CALL reach_error() [L4] __assert_fail("0", "interpolation2.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 17 SDslu, 94 SDs, 0 SdLazy, 92 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 2608 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...