/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=DEEPEST --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/water_pid.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:40:48,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:40:48,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:40:48,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:40:48,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:40:48,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:40:48,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:40:48,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:40:48,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:40:48,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:40:48,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:40:48,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:40:48,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:40:48,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:40:48,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:40:48,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:40:48,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:40:48,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:40:48,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:40:48,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:40:48,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:40:48,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:40:48,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:40:48,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:40:48,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:40:48,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:40:48,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:40:48,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:40:48,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:40:48,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:40:48,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:40:48,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:40:48,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:40:48,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:40:48,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:40:48,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:40:48,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:40:48,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:40:48,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:40:48,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:40:48,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:40:48,226 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 [2020-10-27 19:40:48,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:40:48,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:40:48,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:40:48,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:40:48,256 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:40:48,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:40:48,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:40:48,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:40:48,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:40:48,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:40:48,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:40:48,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:40:48,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:40:48,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:40:48,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:40:48,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:40:48,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:40:48,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:40:48,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:40:48,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:40:48,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:40:48,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:40:48,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:40:48,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:40:48,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:40:48,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:40:48,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:40:48,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:40:48,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:40:48,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:40:48,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:40:48,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:40:48,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:40:48,729 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:40:48,729 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:40:48,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/water_pid.c [2020-10-27 19:40:48,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08d9be170/31a3cde6f40d462ba32473c622b53f42/FLAGaa3f82593 [2020-10-27 19:40:49,523 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:40:49,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/water_pid.c [2020-10-27 19:40:49,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08d9be170/31a3cde6f40d462ba32473c622b53f42/FLAGaa3f82593 [2020-10-27 19:40:49,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08d9be170/31a3cde6f40d462ba32473c622b53f42 [2020-10-27 19:40:49,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:40:49,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:40:49,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:49,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:40:49,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:40:49,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:49" (1/1) ... [2020-10-27 19:40:49,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473e7c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:49, skipping insertion in model container [2020-10-27 19:40:49,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:49" (1/1) ... [2020-10-27 19:40:49,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:40:49,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:40:50,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:50,097 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:40:50,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:50,137 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:40:50,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50 WrapperNode [2020-10-27 19:40:50,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:50,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:40:50,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:40:50,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:40:50,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (1/1) ... [2020-10-27 19:40:50,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:40:50,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:40:50,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:40:50,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:40:50,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (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 [2020-10-27 19:40:50,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:40:50,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:40:50,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:40:50,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 19:40:50,272 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2020-10-27 19:40:50,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:40:50,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:40:50,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:40:50,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:40:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:40:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 19:40:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure y [2020-10-27 19:40:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:40:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:40:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:40:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:40:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:40:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:40:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:40:50,603 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:40:50,603 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:40:50,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:50 BoogieIcfgContainer [2020-10-27 19:40:50,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:40:50,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:40:50,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:40:50,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:40:50,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:40:49" (1/3) ... [2020-10-27 19:40:50,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15687d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:50, skipping insertion in model container [2020-10-27 19:40:50,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:50" (2/3) ... [2020-10-27 19:40:50,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15687d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:50, skipping insertion in model container [2020-10-27 19:40:50,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:50" (3/3) ... [2020-10-27 19:40:50,639 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2020-10-27 19:40:50,676 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:40:50,688 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:40:50,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:40:50,762 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:40:50,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:40:50,763 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:40:50,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:40:50,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:40:50,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:40:50,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:40:50,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:40:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 19:40:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:40:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:50,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:50,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 674186504, now seen corresponding path program 1 times [2020-10-27 19:40:50,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:50,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832830623] [2020-10-27 19:40:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:40:51,022 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:40:51,023 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:40:51,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:40:51,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:40:51 BoogieIcfgContainer [2020-10-27 19:40:51,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:40:51,049 INFO L168 Benchmark]: Toolchain (without parser) took 1177.13 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 122.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2020-10-27 19:40:51,050 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:40:51,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.42 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 115.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:40:51,052 INFO L168 Benchmark]: Boogie Preprocessor took 43.48 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:40:51,053 INFO L168 Benchmark]: RCFGBuilder took 422.61 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 100.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 19:40:51,054 INFO L168 Benchmark]: TraceAbstraction took 425.95 ms. Allocated memory is still 151.0 MB. Free memory was 134.3 MB in the beginning and 122.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:40:51,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.42 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 115.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.48 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.61 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 100.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 425.95 ms. Allocated memory is still 151.0 MB. Free memory was 134.3 MB in the beginning and 122.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 46, overapproximation of to_real at line 31, overapproximation of someBinaryArithmeticDOUBLEoperation at line 41. Possible FailurePath: [L12] static NUM yn = 0; [L14] NUM ui = 0; [L24] NUM yi, yc; [L25] NUM K; [L26] NUM T; [L27] NUM taui; [L28] NUM taud; [L29] NUM ei, sumej, epi; [L30] int i; [L31] T = 1 [L32] taui = 1 [L33] taud = 1 [L34] K = .5 [L35] yc = .5 [L36] CALL, EXPR y(0) [L18] yn += ui [L19] return yn; [L36] RET, EXPR y(0) [L36] yi = y(0) [L37] epi = yc-yi [L38] sumej = epi [L39] i=0 [L39] COND TRUE i<120 [L40] CALL, EXPR y(i) [L18] yn += ui [L19] return yn; [L40] RET, EXPR y(i) [L40] yi = y(i) [L41] ei = yc-yi [L42] sumej = sumej+ei [L43] ui = K*(ei+sumej*T/taui+taud/T*(ei-epi)) [L44] epi = ei [L46] CALL __VERIFIER_assert(epi >= -1. && epi <= 1.) [L8] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "water_pid.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...