./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/filter2_alt.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/filter2_alt.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 13:36:46,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:36:46,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:36:46,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:36:46,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:36:46,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:36:46,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:36:46,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:36:46,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:36:46,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:36:46,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:36:46,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:36:46,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:36:46,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:36:46,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:36:46,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:36:46,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:36:46,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:36:46,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:36:46,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:36:46,463 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:36:46,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:36:46,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:36:46,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:36:46,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:36:46,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:36:46,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:36:46,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:36:46,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:36:46,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:36:46,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:36:46,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:36:46,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:36:46,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:36:46,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:36:46,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:36:46,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:36:46,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:36:46,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:36:46,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:36:46,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:36:46,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:36:46,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 13:36:46,502 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:36:46,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:36:46,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:36:46,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:36:46,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:36:46,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:36:46,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:36:46,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:36:46,505 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:36:46,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:36:46,505 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:36:46,506 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:36:46,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:36:46,507 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:36:46,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:36:46,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:36:46,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:36:46,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:36:46,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:36:46,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:36:46,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:36:46,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:36:46,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 13:36:46,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 13:36:46,517 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:36:46,517 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:36:46,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:36:46,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 [2022-07-19 13:36:46,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:36:46,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:36:46,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:36:46,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:36:46,739 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:36:46,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-19 13:36:46,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/975276712/6889129bef08467aa2e7ec0d53deac34/FLAG04cb3d5d4 [2022-07-19 13:36:47,108 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:36:47,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-19 13:36:47,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/975276712/6889129bef08467aa2e7ec0d53deac34/FLAG04cb3d5d4 [2022-07-19 13:36:47,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/975276712/6889129bef08467aa2e7ec0d53deac34 [2022-07-19 13:36:47,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:36:47,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:36:47,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:36:47,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:36:47,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:36:47,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d2178cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47, skipping insertion in model container [2022-07-19 13:36:47,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:36:47,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:36:47,235 WARN L230 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/filter2_alt.c[631,644] [2022-07-19 13:36:47,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:36:47,254 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:36:47,262 WARN L230 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/filter2_alt.c[631,644] [2022-07-19 13:36:47,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:36:47,275 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:36:47,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47 WrapperNode [2022-07-19 13:36:47,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:36:47,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:36:47,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:36:47,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:36:47,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,300 INFO L137 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2022-07-19 13:36:47,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:36:47,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:36:47,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:36:47,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:36:47,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:36:47,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:36:47,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:36:47,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:36:47,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (1/1) ... [2022-07-19 13:36:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:36:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:36:47,344 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) [2022-07-19 13:36:47,345 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 [2022-07-19 13:36:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:36:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure RANDOM_INPUT [2022-07-19 13:36:47,375 INFO L138 BoogieDeclarations]: Found implementation of procedure RANDOM_INPUT [2022-07-19 13:36:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 13:36:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-07-19 13:36:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-19 13:36:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:36:47,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:36:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-07-19 13:36:47,439 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:36:47,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:36:47,522 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:36:47,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:36:47,526 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 13:36:47,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:36:47 BoogieIcfgContainer [2022-07-19 13:36:47,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:36:47,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:36:47,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:36:47,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:36:47,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:36:47" (1/3) ... [2022-07-19 13:36:47,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eff37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:36:47, skipping insertion in model container [2022-07-19 13:36:47,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:47" (2/3) ... [2022-07-19 13:36:47,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eff37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:36:47, skipping insertion in model container [2022-07-19 13:36:47,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:36:47" (3/3) ... [2022-07-19 13:36:47,533 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2022-07-19 13:36:47,542 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:36:47,542 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:36:47,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:36:47,586 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=PETRI_NET, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@104f3c7c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a88bcc8 [2022-07-19 13:36:47,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:36:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 13:36:47,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:36:47,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:36:47,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:36:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:36:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -254494899, now seen corresponding path program 1 times [2022-07-19 13:36:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:36:47,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108837637] [2022-07-19 13:36:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:36:47,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:36:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 13:36:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 13:36:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 13:36:47,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:36:47,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108837637] [2022-07-19 13:36:47,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108837637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:36:47,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:36:47,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:36:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046249963] [2022-07-19 13:36:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:36:47,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 13:36:47,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:36:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 13:36:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:36:47,808 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:36:47,822 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-07-19 13:36:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 13:36:47,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 13:36:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:36:47,828 INFO L225 Difference]: With dead ends: 39 [2022-07-19 13:36:47,828 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 13:36:47,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:36:47,834 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:36:47,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:36:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 13:36:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-19 13:36:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 13:36:47,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2022-07-19 13:36:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:36:47,858 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 13:36:47,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 13:36:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 13:36:47,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:36:47,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:36:47,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 13:36:47,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:36:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:36:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2084909879, now seen corresponding path program 1 times [2022-07-19 13:36:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:36:47,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246606559] [2022-07-19 13:36:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:36:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:36:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:47,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 13:36:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:47,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 13:36:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 13:36:47,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:36:47,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246606559] [2022-07-19 13:36:47,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246606559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:36:47,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:36:47,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:36:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157301061] [2022-07-19 13:36:47,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:36:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:36:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:36:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:36:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:36:47,947 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:36:47,960 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-07-19 13:36:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:36:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 13:36:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:36:47,961 INFO L225 Difference]: With dead ends: 45 [2022-07-19 13:36:47,961 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 13:36:47,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:36:47,963 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:36:47,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:36:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 13:36:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-19 13:36:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 13:36:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-19 13:36:47,968 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-07-19 13:36:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:36:47,968 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-19 13:36:47,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-19 13:36:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 13:36:47,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:36:47,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:36:47,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 13:36:47,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:36:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:36:47,970 INFO L85 PathProgramCache]: Analyzing trace with hash 371954385, now seen corresponding path program 1 times [2022-07-19 13:36:47,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:36:47,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115399518] [2022-07-19 13:36:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:36:47,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:36:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:36:48,012 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 13:36:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:36:48,053 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 13:36:48,053 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 13:36:48,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 13:36:48,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 13:36:48,058 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 13:36:48,060 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 13:36:48,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 01:36:48 BoogieIcfgContainer [2022-07-19 13:36:48,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 13:36:48,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 13:36:48,100 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 13:36:48,100 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 13:36:48,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:36:47" (3/4) ... [2022-07-19 13:36:48,102 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-19 13:36:48,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 13:36:48,103 INFO L158 Benchmark]: Toolchain (without parser) took 977.58ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 51.1MB in the beginning and 67.4MB in the end (delta: -16.2MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. [2022-07-19 13:36:48,103 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:36:48,104 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.68ms. Allocated memory is still 88.1MB. Free memory was 50.9MB in the beginning and 40.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 13:36:48,105 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.96ms. Allocated memory is still 88.1MB. Free memory was 40.5MB in the beginning and 38.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:36:48,106 INFO L158 Benchmark]: Boogie Preprocessor took 15.30ms. Allocated memory is still 88.1MB. Free memory was 38.8MB in the beginning and 37.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:36:48,106 INFO L158 Benchmark]: RCFGBuilder took 209.56ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 37.6MB in the beginning and 90.0MB in the end (delta: -52.4MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2022-07-19 13:36:48,108 INFO L158 Benchmark]: TraceAbstraction took 570.16ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 67.4MB in the end (delta: 22.1MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2022-07-19 13:36:48,108 INFO L158 Benchmark]: Witness Printer took 2.93ms. Allocated memory is still 117.4MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:36:48,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.68ms. Allocated memory is still 88.1MB. Free memory was 50.9MB in the beginning and 40.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.96ms. Allocated memory is still 88.1MB. Free memory was 40.5MB in the beginning and 38.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.30ms. Allocated memory is still 88.1MB. Free memory was 38.8MB in the beginning and 37.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 209.56ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 37.6MB in the beginning and 90.0MB in the end (delta: -52.4MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 570.16ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 67.4MB in the end (delta: 22.1MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Witness Printer took 2.93ms. Allocated memory is still 117.4MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. * 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: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 43, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L19] BOOLEAN INIT; [L20] float P, X; [L32] static float E[2], S[2]; VAL [E={4:0}, INIT=0, P=0, S={5:0}, X=0] [L52] CALL, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=0, S={5:0}, X=0] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L26] CALL assume_abort_if_not(x >= -10.f && x <= 10.f) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, E={4:0}, INIT=0, P=0, S={5:0}, X=0] [L26] RET assume_abort_if_not(x >= -10.f && x <= 10.f) [L27] return x; VAL [\result=57, E={4:0}, INIT=0, P=0, S={5:0}, x=57, X=0] [L52] RET, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=0, RANDOM_INPUT()=57, S={5:0}, X=0] [L52] X = RANDOM_INPUT() [L53] INIT = TRUE VAL [E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L54] COND TRUE \read(TRUE) VAL [E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L55] CALL, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L26] CALL assume_abort_if_not(x >= -10.f && x <= 10.f) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L26] RET assume_abort_if_not(x >= -10.f && x <= 10.f) [L27] return x; VAL [\result=52, E={4:0}, INIT=1, P=0, S={5:0}, X=57, x=52] [L55] RET, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=1, P=0, RANDOM_INPUT()=52, S={5:0}, X=57] [L55] X = RANDOM_INPUT() [L56] CALL filter2 () [L33] COND TRUE \read(INIT) [L34] S[0] = X [L35] P = X [L36] E[0] = X VAL [E={4:0}, INIT=1, P=52, S={5:0}, X=52] [L46] EXPR E[0] [L46] E[1] = E[0] [L46] E[0] = X [L47] EXPR S[0] [L47] S[1] = S[0] [L47] S[0] = P VAL [E={4:0}, INIT=1, P=52, S={5:0}, X=52] [L56] RET filter2 () [L57] INIT = FALSE VAL [E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L54] COND TRUE \read(TRUE) VAL [E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L55] CALL, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L26] CALL assume_abort_if_not(x >= -10.f && x <= 10.f) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L26] RET assume_abort_if_not(x >= -10.f && x <= 10.f) [L27] return x; VAL [\result=49, E={4:0}, INIT=0, P=52, S={5:0}, X=52, x=49] [L55] RET, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=52, RANDOM_INPUT()=49, S={5:0}, X=52] [L55] X = RANDOM_INPUT() [L56] CALL filter2 () [L33] COND FALSE !(\read(INIT)) [L39] EXPR E[0] [L40] EXPR E[1] [L41] EXPR S[0] [L42] EXPR S[1] [L38-L42] P = (((((0.4677826f * X) - (E[0] * 0.7700725f)) + (E[1] * 0.4344376f)) + (S[0] * 1.5419f)) - (S[1] * 0.6740477f)) [L43] CALL __VERIFIER_assert(P >= -15.f && P <= 15.f) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, E={4:0}, INIT=0, S={5:0}, X=49] [L14] reach_error() VAL [\old(cond)=0, cond=0, E={4:0}, INIT=0, S={5:0}, X=49] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 46 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 5, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 46 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 10/10 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 [2022-07-19 13:36:48,142 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/filter2_alt.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 13:36:49,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:36:49,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:36:49,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:36:49,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:36:49,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:36:49,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:36:49,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:36:49,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:36:49,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:36:49,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:36:49,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:36:49,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:36:49,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:36:49,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:36:49,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:36:49,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:36:49,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:36:49,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:36:49,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:36:49,746 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:36:49,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:36:49,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:36:49,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:36:49,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:36:49,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:36:49,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:36:49,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:36:49,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:36:49,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:36:49,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:36:49,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:36:49,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:36:49,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:36:49,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:36:49,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:36:49,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:36:49,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:36:49,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:36:49,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:36:49,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:36:49,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:36:49,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 13:36:49,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:36:49,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:36:49,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:36:49,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:36:49,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:36:49,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:36:49,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:36:49,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:36:49,774 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:36:49,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:36:49,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:36:49,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:36:49,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:36:49,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:36:49,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:36:49,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:36:49,775 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 13:36:49,775 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 13:36:49,775 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 13:36:49,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:36:49,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:36:49,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:36:49,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:36:49,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:36:49,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:36:49,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:36:49,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:36:49,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:36:49,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:36:49,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:36:49,777 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 13:36:49,778 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 13:36:49,778 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:36:49,778 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:36:49,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:36:49,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 13:36:49,779 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 [2022-07-19 13:36:50,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:36:50,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:36:50,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:36:50,050 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:36:50,050 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:36:50,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-19 13:36:50,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727cc668e/5e8972448bd14a17a47f9e4919193236/FLAGff202ee64 [2022-07-19 13:36:50,418 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:36:50,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-19 13:36:50,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727cc668e/5e8972448bd14a17a47f9e4919193236/FLAGff202ee64 [2022-07-19 13:36:50,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727cc668e/5e8972448bd14a17a47f9e4919193236 [2022-07-19 13:36:50,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:36:50,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:36:50,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:36:50,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:36:50,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:36:50,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:36:50" (1/1) ... [2022-07-19 13:36:50,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4c7d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:50, skipping insertion in model container [2022-07-19 13:36:50,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:36:50" (1/1) ... [2022-07-19 13:36:50,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:36:50,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:36:50,951 WARN L230 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/filter2_alt.c[631,644] [2022-07-19 13:36:50,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:36:50,969 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:36:50,976 WARN L230 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/filter2_alt.c[631,644] [2022-07-19 13:36:51,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:36:51,023 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:36:51,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51 WrapperNode [2022-07-19 13:36:51,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:36:51,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:36:51,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:36:51,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:36:51,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,063 INFO L137 Inliner]: procedures = 20, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2022-07-19 13:36:51,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:36:51,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:36:51,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:36:51,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:36:51,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:36:51,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:36:51,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:36:51,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:36:51,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (1/1) ... [2022-07-19 13:36:51,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:36:51,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:36:51,126 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) [2022-07-19 13:36:51,131 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 [2022-07-19 13:36:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:36:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure RANDOM_INPUT [2022-07-19 13:36:51,153 INFO L138 BoogieDeclarations]: Found implementation of procedure RANDOM_INPUT [2022-07-19 13:36:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2022-07-19 13:36:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 13:36:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2022-07-19 13:36:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:36:51,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:36:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-07-19 13:36:51,214 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:36:51,215 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:36:53,383 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:36:53,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:36:53,390 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 13:36:53,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:36:53 BoogieIcfgContainer [2022-07-19 13:36:53,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:36:53,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:36:53,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:36:53,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:36:53,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:36:50" (1/3) ... [2022-07-19 13:36:53,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39956a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:36:53, skipping insertion in model container [2022-07-19 13:36:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:36:51" (2/3) ... [2022-07-19 13:36:53,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39956a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:36:53, skipping insertion in model container [2022-07-19 13:36:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:36:53" (3/3) ... [2022-07-19 13:36:53,402 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2022-07-19 13:36:53,412 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:36:53,412 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:36:53,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:36:53,455 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=PETRI_NET, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72e5e9c6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@43ebbb96 [2022-07-19 13:36:53,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:36:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 13:36:53,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:36:53,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:36:53,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:36:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:36:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -254494899, now seen corresponding path program 1 times [2022-07-19 13:36:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:36:53,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444212459] [2022-07-19 13:36:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:36:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:36:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:36:53,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 13:36:53,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 13:36:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:53,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 13:36:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:36:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 13:36:53,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 13:36:53,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 13:36:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444212459] [2022-07-19 13:36:53,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444212459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:36:53,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:36:53,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:36:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674994992] [2022-07-19 13:36:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:36:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 13:36:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 13:36:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 13:36:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:36:53,911 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:36:53,924 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-07-19 13:36:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 13:36:53,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 13:36:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:36:53,929 INFO L225 Difference]: With dead ends: 39 [2022-07-19 13:36:53,929 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 13:36:53,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:36:53,934 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:36:53,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:36:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 13:36:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-19 13:36:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 13:36:53,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2022-07-19 13:36:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:36:53,959 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 13:36:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 13:36:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 13:36:53,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:36:53,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:36:53,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-19 13:36:54,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 13:36:54,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:36:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:36:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2084909879, now seen corresponding path program 1 times [2022-07-19 13:36:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:36:54,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939592416] [2022-07-19 13:36:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:36:54,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:36:54,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:36:54,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 13:36:54,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 13:36:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:36:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 13:36:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:36:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:36:54,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 13:36:54,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 13:36:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939592416] [2022-07-19 13:36:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939592416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:36:54,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:36:54,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 13:36:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930604414] [2022-07-19 13:36:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:36:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 13:36:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 13:36:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 13:36:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:36:54,575 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:56,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 13:36:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:36:56,718 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-07-19 13:36:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 13:36:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 13:36:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:36:56,764 INFO L225 Difference]: With dead ends: 45 [2022-07-19 13:36:56,764 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 13:36:56,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 13:36:56,765 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:36:56,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 13:36:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 13:36:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-19 13:36:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 13:36:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-19 13:36:56,770 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-07-19 13:36:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:36:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-19 13:36:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 13:36:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-19 13:36:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 13:36:56,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:36:56,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:36:56,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-19 13:36:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 13:36:56,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:36:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:36:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash 371954385, now seen corresponding path program 1 times [2022-07-19 13:36:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:36:56,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262471359] [2022-07-19 13:36:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:36:56,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:36:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:36:56,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 13:36:56,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-19 13:37:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:37:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 13:37:01,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:37:02,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 13:37:02,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-19 13:37:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 13:37:02,481 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-19 13:37:02,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 237 treesize of output 131 [2022-07-19 13:37:04,498 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-19 13:37:04,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 639 treesize of output 339