/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/float-benchs/filter_iir.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:20:04,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:20:04,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:20:04,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:20:04,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:20:04,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:20:04,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:20:04,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:20:04,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:20:04,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:20:04,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:20:04,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:20:04,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:20:04,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:20:04,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:20:04,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:20:04,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:20:04,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:20:04,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:20:04,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:20:04,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:20:04,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:20:04,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:20:04,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:20:04,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:20:04,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:20:04,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:20:04,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:20:04,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:20:04,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:20:04,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:20:04,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:20:04,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:20:04,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:20:04,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:20:04,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:20:04,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:20:04,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:20:04,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:20:04,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:20:04,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:20:04,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 21:20:04,313 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:20:04,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:20:04,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:20:04,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:20:04,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:20:04,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:20:04,315 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:20:04,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:20:04,315 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:20:04,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:20:04,316 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:20:04,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:20:04,316 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:20:04,316 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:20:04,316 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:20:04,316 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:20:04,316 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:20:04,317 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:20:04,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:20:04,317 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:20:04,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:20:04,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:20:04,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:20:04,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:20:04,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:20:04,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:20:04,318 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:20:04,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:20:04,319 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:20:04,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:20:04,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:20:04,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:20:04,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:04,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:20:04,320 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:20:04,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:20:04,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:20:04,320 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:20:04,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:20:04,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:20:04,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:20:04,321 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:20:04,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:20:04,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:20:04,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:20:04,565 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:20:04,566 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:20:04,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter_iir.c [2023-04-02 21:20:05,732 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:20:05,937 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:20:05,937 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c [2023-04-02 21:20:05,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88b433dff/9b3f1771dd13423e99df8197cf262ea0/FLAGe49883b3a [2023-04-02 21:20:05,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88b433dff/9b3f1771dd13423e99df8197cf262ea0 [2023-04-02 21:20:05,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:20:05,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:20:05,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:05,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:20:05,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:20:05,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:05" (1/1) ... [2023-04-02 21:20:05,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1338e2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:05, skipping insertion in model container [2023-04-02 21:20:05,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:05" (1/1) ... [2023-04-02 21:20:05,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:20:05,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:20:06,109 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2023-04-02 21:20:06,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:06,145 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:20:06,154 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2023-04-02 21:20:06,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:06,179 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:20:06,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06 WrapperNode [2023-04-02 21:20:06,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:06,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:20:06,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:20:06,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:20:06,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:20:06,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:20:06,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:20:06,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:20:06,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (1/1) ... [2023-04-02 21:20:06,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:06,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 21:20:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure iir4 [2023-04-02 21:20:06,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure iir4 [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:20:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:20:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:20:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-04-02 21:20:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:20:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:20:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:20:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:20:06,420 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:20:06,424 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:20:06,700 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:20:06,755 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:20:06,756 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 21:20:06,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:06 BoogieIcfgContainer [2023-04-02 21:20:06,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:20:06,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:20:06,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:20:06,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:20:06,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:20:05" (1/3) ... [2023-04-02 21:20:06,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f6db1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:06, skipping insertion in model container [2023-04-02 21:20:06,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:06" (2/3) ... [2023-04-02 21:20:06,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f6db1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:06, skipping insertion in model container [2023-04-02 21:20:06,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:06" (3/3) ... [2023-04-02 21:20:06,765 INFO L112 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2023-04-02 21:20:06,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:20:06,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:20:06,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:20:06,832 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b6fa6ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:20:06,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:20:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 21:20:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 21:20:06,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:06,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:06,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:06,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash -198708949, now seen corresponding path program 1 times [2023-04-02 21:20:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:06,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827802855] [2023-04-02 21:20:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:06,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:20:07,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 21:20:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:20:07,275 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 21:20:07,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 21:20:07,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:20:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:20:07,283 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-02 21:20:07,286 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:20:07,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:20:07 BoogieIcfgContainer [2023-04-02 21:20:07,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:20:07,324 INFO L158 Benchmark]: Toolchain (without parser) took 1360.26ms. Allocated memory is still 181.4MB. Free memory was 150.0MB in the beginning and 152.9MB in the end (delta: -2.9MB). Peak memory consumption was 67.0MB. Max. memory is 8.0GB. [2023-04-02 21:20:07,324 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:20:07,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.90ms. Allocated memory is still 181.4MB. Free memory was 150.0MB in the beginning and 138.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 21:20:07,325 INFO L158 Benchmark]: Boogie Preprocessor took 54.55ms. Allocated memory is still 181.4MB. Free memory was 138.5MB in the beginning and 136.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 21:20:07,325 INFO L158 Benchmark]: RCFGBuilder took 522.16ms. Allocated memory is still 181.4MB. Free memory was 136.4MB in the beginning and 116.4MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-04-02 21:20:07,326 INFO L158 Benchmark]: TraceAbstraction took 562.51ms. Allocated memory is still 181.4MB. Free memory was 115.7MB in the beginning and 152.9MB in the end (delta: -37.1MB). Peak memory consumption was 32.4MB. Max. memory is 8.0GB. [2023-04-02 21:20:07,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.90ms. Allocated memory is still 181.4MB. Free memory was 150.0MB in the beginning and 138.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 54.55ms. Allocated memory is still 181.4MB. Free memory was 138.5MB in the beginning and 136.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 522.16ms. Allocated memory is still 181.4MB. Free memory was 136.4MB in the beginning and 116.4MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 562.51ms. Allocated memory is still 181.4MB. Free memory was 115.7MB in the beginning and 152.9MB in the end (delta: -37.1MB). Peak memory consumption was 32.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is 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. VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] [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. VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X >= -10. && X <= 10.=1, X={11:0}, \read(X)=78, \read(X)=78, b1={5:0}, b2={7:0}] [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=1, b1={5:0}, b2={7:0}] [L11] COND FALSE !(!cond) [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X >= -10. && X <= 10.=1, X={11:0}, \read(X)=78, \read(X)=78, b1={5:0}, b2={7:0}] [L52] CALL iir4(&X, &P) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}, x={11:0}, y={10:0}] [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) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P >= -1e30 && P <= 1e30=0, P={10:0}, X={11:0}, \read(P)=80, \read(P)=80, b1={5:0}, b2={7:0}] [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=0, b1={5:0}, b2={7:0}] [L13] COND TRUE !(cond) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=0, b1={5:0}, b2={7:0}, cond=0] [L13] reach_error() VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=0, b1={5:0}, b2={7:0}, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 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, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 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 [2023-04-02 21:20:07,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...