/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/filter_iir.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:23:12,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:23:12,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:23:12,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:23:12,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:23:12,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:23:12,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:23:12,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:23:12,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:23:12,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:23:12,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:23:12,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:23:12,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:23:12,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:23:12,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:23:12,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:23:12,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:23:12,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:23:12,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:23:12,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:23:12,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:23:12,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:23:12,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:23:12,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:23:12,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:23:12,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:23:12,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:23:12,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:23:12,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:23:12,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:23:12,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:23:12,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:23:12,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:23:12,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:23:12,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:23:12,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:23:12,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:23:12,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:23:12,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:23:12,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:23:12,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:23:12,523 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 14:23:12,554 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:23:12,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:23:12,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:23:12,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:23:12,556 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:23:12,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:23:12,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:23:12,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:23:12,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:23:12,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:23:12,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:23:12,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:23:12,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:23:12,558 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:23:12,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:23:12,558 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:23:12,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:23:12,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:23:12,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:23:12,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:23:12,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:23:12,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:23:12,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:23:12,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:23:12,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:23:12,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:23:12,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:23:12,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:23:12,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:23:12,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:23:12,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:23:12,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:23:12,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:23:12,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:23:12,979 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:23:12,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/filter_iir.c [2020-10-28 14:23:13,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea176584f/b522d5a0b745402893993768e99bc6e5/FLAG1604241f2 [2020-10-28 14:23:13,638 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:23:13,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/filter_iir.c [2020-10-28 14:23:13,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea176584f/b522d5a0b745402893993768e99bc6e5/FLAG1604241f2 [2020-10-28 14:23:14,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea176584f/b522d5a0b745402893993768e99bc6e5 [2020-10-28 14:23:14,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:23:14,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:23:14,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:14,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:23:14,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:23:14,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58805749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14, skipping insertion in model container [2020-10-28 14:23:14,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:23:14,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:23:14,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:14,384 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:23:14,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:14,440 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:23:14,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14 WrapperNode [2020-10-28 14:23:14,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:14,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:23:14,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:23:14,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:23:14,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (1/1) ... [2020-10-28 14:23:14,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:23:14,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:23:14,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:23:14,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:23:14,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (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 14:23:14,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:23:14,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:23:14,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:23:14,586 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:23:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:23:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure iir4 [2020-10-28 14:23:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:23:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:23:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:23:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:23:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:23:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-28 14:23:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:23:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:23:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure iir4 [2020-10-28 14:23:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-28 14:23:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-28 14:23:14,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:23:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:23:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:23:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-28 14:23:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:23:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:23:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:23:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:23:15,120 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:23:15,120 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:23:15,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:15 BoogieIcfgContainer [2020-10-28 14:23:15,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:23:15,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:23:15,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:23:15,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:23:15,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:23:14" (1/3) ... [2020-10-28 14:23:15,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a8cdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:15, skipping insertion in model container [2020-10-28 14:23:15,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:14" (2/3) ... [2020-10-28 14:23:15,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a8cdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:15, skipping insertion in model container [2020-10-28 14:23:15,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:15" (3/3) ... [2020-10-28 14:23:15,130 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2020-10-28 14:23:15,142 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:23:15,146 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:23:15,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:23:15,183 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:23:15,184 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:23:15,184 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:23:15,184 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:23:15,184 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:23:15,184 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:23:15,184 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:23:15,185 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:23:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 14:23:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:23:15,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:15,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:15,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1487076533, now seen corresponding path program 1 times [2020-10-28 14:23:15,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:15,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834511391] [2020-10-28 14:23:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:15,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:15,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:15,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:23:15,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:15,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-28 14:23:15,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:15,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:15,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:23:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:15,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:23:16,115 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-28 14:23:16,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:16,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:16,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:16,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:16,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:16,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 14:23:16,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:16,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:16,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:16,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:16,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:16,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:23:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:23:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:16,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:16,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:23:16,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:23:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:16,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 14:23:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:16,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:16,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 14:23:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:16,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:16,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:16,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:16,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:16,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:23:16,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:16,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:23:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:16,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:16,277 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 14:23:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834511391] [2020-10-28 14:23:16,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:16,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:23:16,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585820508] [2020-10-28 14:23:16,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:23:16,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:23:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:16,307 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-28 14:23:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:16,573 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-28 14:23:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:23:16,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:23:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:16,582 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:23:16,583 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:23:16,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:23:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:23:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 14:23:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:23:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 14:23:16,632 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-28 14:23:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:16,633 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 14:23:16,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:23:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 14:23:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:23:16,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:16,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:16,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:23:16,635 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1528027085, now seen corresponding path program 1 times [2020-10-28 14:23:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:16,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966656112] [2020-10-28 14:23:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:23:16,721 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:23:16,722 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:23:16,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:23:16,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:23:16 BoogieIcfgContainer [2020-10-28 14:23:16,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:23:16,763 INFO L168 Benchmark]: Toolchain (without parser) took 2738.15 ms. Allocated memory is still 163.6 MB. Free memory was 139.3 MB in the beginning and 61.9 MB in the end (delta: 77.3 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:16,764 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:23:16,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.55 ms. Allocated memory is still 163.6 MB. Free memory was 138.6 MB in the beginning and 127.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:16,768 INFO L168 Benchmark]: Boogie Preprocessor took 71.75 ms. Allocated memory is still 163.6 MB. Free memory was 127.7 MB in the beginning and 125.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:16,769 INFO L168 Benchmark]: RCFGBuilder took 607.05 ms. Allocated memory is still 163.6 MB. Free memory was 125.7 MB in the beginning and 135.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:16,770 INFO L168 Benchmark]: TraceAbstraction took 1636.01 ms. Allocated memory is still 163.6 MB. Free memory was 134.8 MB in the beginning and 61.9 MB in the end (delta: 72.9 MB). Peak memory consumption was 74.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:16,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 409.55 ms. Allocated memory is still 163.6 MB. Free memory was 138.6 MB in the beginning and 127.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.75 ms. Allocated memory is still 163.6 MB. Free memory was 127.7 MB in the beginning and 125.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 607.05 ms. Allocated memory is still 163.6 MB. Free memory was 125.7 MB in the beginning and 135.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1636.01 ms. Allocated memory is still 163.6 MB. Free memory was 134.8 MB in the beginning and 61.9 MB in the end (delta: 72.9 MB). Peak memory consumption was 74.0 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 54, overapproximation of to_real at line 16, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L16] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L17] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L18] double A2[3] = { 1, 1.633101801841, 1.0 }; [L19] double b2[2] = { 1.742319554830, 0.820939679242 }; [L21] double D1[2], D2[2]; [L22] double P, X; [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 0. [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) [L11] COND FALSE !(!cond) [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) [L52] CALL iir4(&X, &P) [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 [L52] RET iir4(&X, &P) [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L13] COND TRUE !(cond) [L13] CALL reach_error() [L3] __assert_fail("0", "filter_iir.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 26 SDslu, 1 SDs, 0 SdLazy, 27 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 2592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...