./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 f4b24e32 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-?-f4b24e3 [2022-07-13 14:10:52,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 14:10:52,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 14:10:52,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 14:10:52,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 14:10:52,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 14:10:52,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 14:10:52,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 14:10:52,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 14:10:52,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 14:10:52,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 14:10:52,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 14:10:52,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 14:10:52,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 14:10:52,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 14:10:52,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 14:10:52,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 14:10:52,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 14:10:52,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 14:10:52,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 14:10:52,093 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 14:10:52,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 14:10:52,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 14:10:52,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 14:10:52,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 14:10:52,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 14:10:52,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 14:10:52,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 14:10:52,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 14:10:52,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 14:10:52,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 14:10:52,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 14:10:52,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 14:10:52,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 14:10:52,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 14:10:52,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 14:10:52,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 14:10:52,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 14:10:52,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 14:10:52,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 14:10:52,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 14:10:52,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 14:10:52,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 14:10:52,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 14:10:52,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 14:10:52,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 14:10:52,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 14:10:52,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 14:10:52,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 14:10:52,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 14:10:52,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 14:10:52,133 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 14:10:52,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 14:10:52,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 14:10:52,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 14:10:52,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 14:10:52,135 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 14:10:52,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 14:10:52,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 14:10:52,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 14:10:52,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 14:10:52,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 14:10:52,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 14:10:52,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 14:10:52,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 14:10:52,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 14:10:52,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 14:10:52,137 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 14:10:52,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 14:10:52,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 14:10:52,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 [2022-07-13 14:10:52,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 14:10:52,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 14:10:52,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 14:10:52,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 14:10:52,339 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 14:10:52,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-13 14:10:52,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674a696c0/2b0bfdd3a0a5446a93ac551e375c120b/FLAG1c3d6d891 [2022-07-13 14:10:52,777 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 14:10:52,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-13 14:10:52,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674a696c0/2b0bfdd3a0a5446a93ac551e375c120b/FLAG1c3d6d891 [2022-07-13 14:10:52,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674a696c0/2b0bfdd3a0a5446a93ac551e375c120b [2022-07-13 14:10:52,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 14:10:52,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 14:10:52,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 14:10:52,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 14:10:52,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 14:10:52,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:10:52" (1/1) ... [2022-07-13 14:10:52,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ddddd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:52, skipping insertion in model container [2022-07-13 14:10:52,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:10:52" (1/1) ... [2022-07-13 14:10:52,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 14:10:52,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 14:10:52,949 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] [2022-07-13 14:10:52,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 14:10:52,975 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 14:10:52,983 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] [2022-07-13 14:10:52,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 14:10:53,002 INFO L208 MainTranslator]: Completed translation [2022-07-13 14:10:53,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53 WrapperNode [2022-07-13 14:10:53,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 14:10:53,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 14:10:53,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 14:10:53,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 14:10:53,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,026 INFO L137 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2022-07-13 14:10:53,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 14:10:53,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 14:10:53,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 14:10:53,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 14:10:53,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 14:10:53,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 14:10:53,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 14:10:53,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 14:10:53,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (1/1) ... [2022-07-13 14:10:53,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 14:10:53,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 14:10:53,069 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) [2022-07-13 14:10:53,078 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 [2022-07-13 14:10:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 14:10:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure RANDOM_INPUT [2022-07-13 14:10:53,099 INFO L138 BoogieDeclarations]: Found implementation of procedure RANDOM_INPUT [2022-07-13 14:10:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 14:10:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-07-13 14:10:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-13 14:10:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 14:10:53,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 14:10:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-07-13 14:10:53,163 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 14:10:53,164 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 14:10:53,254 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 14:10:53,258 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 14:10:53,261 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 14:10:53,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:10:53 BoogieIcfgContainer [2022-07-13 14:10:53,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 14:10:53,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 14:10:53,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 14:10:53,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 14:10:53,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 02:10:52" (1/3) ... [2022-07-13 14:10:53,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a07abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:10:53, skipping insertion in model container [2022-07-13 14:10:53,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:53" (2/3) ... [2022-07-13 14:10:53,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a07abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:10:53, skipping insertion in model container [2022-07-13 14:10:53,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:10:53" (3/3) ... [2022-07-13 14:10:53,269 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2022-07-13 14:10:53,278 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 14:10:53,279 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 14:10:53,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 14:10:53,315 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@52c07ff0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5066cf31 [2022-07-13 14:10:53,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 14:10:53,318 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) [2022-07-13 14:10:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 14:10:53,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:10:53,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:10:53,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:10:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:10:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash -254494899, now seen corresponding path program 1 times [2022-07-13 14:10:53,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:10:53,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050346832] [2022-07-13 14:10:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:10:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:10:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 14:10:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 14:10:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 14:10:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 14:10:53,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050346832] [2022-07-13 14:10:53,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050346832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:10:53,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:10:53,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 14:10:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844011798] [2022-07-13 14:10:53,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:10:53,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 14:10:53,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 14:10:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 14:10:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 14:10:53,523 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) [2022-07-13 14:10:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:10:53,542 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-07-13 14:10:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 14:10:53,544 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 [2022-07-13 14:10:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:10:53,549 INFO L225 Difference]: With dead ends: 39 [2022-07-13 14:10:53,563 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 14:10:53,566 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 [2022-07-13 14:10:53,569 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 [2022-07-13 14:10:53,570 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] [2022-07-13 14:10:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 14:10:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 14:10:53,603 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) [2022-07-13 14:10:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-13 14:10:53,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2022-07-13 14:10:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:10:53,605 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-13 14:10:53,605 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) [2022-07-13 14:10:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-13 14:10:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 14:10:53,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:10:53,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:10:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 14:10:53,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:10:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:10:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2084909879, now seen corresponding path program 1 times [2022-07-13 14:10:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:10:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607447910] [2022-07-13 14:10:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:10:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:10:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:53,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 14:10:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:53,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 14:10:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 14:10:53,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 14:10:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607447910] [2022-07-13 14:10:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607447910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:10:53,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:10:53,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 14:10:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086091487] [2022-07-13 14:10:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:10:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 14:10:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 14:10:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 14:10:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 14:10:53,740 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) [2022-07-13 14:10:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:10:53,773 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-07-13 14:10:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 14:10:53,782 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 [2022-07-13 14:10:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:10:53,784 INFO L225 Difference]: With dead ends: 45 [2022-07-13 14:10:53,784 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 14:10:53,784 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 [2022-07-13 14:10:53,786 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 [2022-07-13 14:10:53,786 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] [2022-07-13 14:10:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 14:10:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-13 14:10:53,792 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) [2022-07-13 14:10:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-13 14:10:53,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-07-13 14:10:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:10:53,794 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-13 14:10:53,794 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) [2022-07-13 14:10:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-13 14:10:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 14:10:53,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:10:53,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:10:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 14:10:53,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:10:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:10:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash 371954385, now seen corresponding path program 1 times [2022-07-13 14:10:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:10:53,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148482604] [2022-07-13 14:10:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:10:53,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:10:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 14:10:53,872 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 14:10:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 14:10:53,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 14:10:53,929 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 14:10:53,930 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 14:10:53,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 14:10:53,934 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 14:10:53,936 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 14:10:53,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 02:10:53 BoogieIcfgContainer [2022-07-13 14:10:53,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 14:10:53,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 14:10:53,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 14:10:53,965 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 14:10:53,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:10:53" (3/4) ... [2022-07-13 14:10:53,967 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-13 14:10:53,967 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 14:10:53,968 INFO L158 Benchmark]: Toolchain (without parser) took 1172.52ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 62.7MB in the beginning and 90.8MB in the end (delta: -28.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 14:10:53,968 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory was 79.0MB in the beginning and 78.9MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 14:10:53,969 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.92ms. Allocated memory is still 102.8MB. Free memory was 62.5MB in the beginning and 76.4MB in the end (delta: -13.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 14:10:53,969 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.70ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 74.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 14:10:53,970 INFO L158 Benchmark]: Boogie Preprocessor took 17.67ms. Allocated memory is still 102.8MB. Free memory was 74.8MB in the beginning and 73.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 14:10:53,970 INFO L158 Benchmark]: RCFGBuilder took 218.20ms. Allocated memory is still 102.8MB. Free memory was 73.5MB in the beginning and 63.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 14:10:53,970 INFO L158 Benchmark]: TraceAbstraction took 699.70ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 62.2MB in the beginning and 91.8MB in the end (delta: -29.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 14:10:53,971 INFO L158 Benchmark]: Witness Printer took 2.88ms. Allocated memory is still 127.9MB. Free memory is still 90.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 14:10:53,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory was 79.0MB in the beginning and 78.9MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.92ms. Allocated memory is still 102.8MB. Free memory was 62.5MB in the beginning and 76.4MB in the end (delta: -13.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.70ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 74.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.67ms. Allocated memory is still 102.8MB. Free memory was 74.8MB in the beginning and 73.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 218.20ms. Allocated memory is still 102.8MB. Free memory was 73.5MB in the beginning and 63.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 699.70ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 62.2MB in the beginning and 91.8MB in the end (delta: -29.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.88ms. Allocated memory is still 127.9MB. Free memory is still 90.8MB. 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=0, x=57] [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=49, X=52] [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: 0.6s, 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, 0.1s 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 [2022-07-13 14:10:54,022 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-?-f4b24e3 [2022-07-13 14:10:55,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 14:10:55,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 14:10:55,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 14:10:55,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 14:10:55,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 14:10:55,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 14:10:55,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 14:10:55,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 14:10:55,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 14:10:55,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 14:10:55,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 14:10:55,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 14:10:55,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 14:10:55,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 14:10:55,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 14:10:55,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 14:10:55,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 14:10:55,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 14:10:55,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 14:10:55,759 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 14:10:55,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 14:10:55,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 14:10:55,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 14:10:55,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 14:10:55,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 14:10:55,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 14:10:55,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 14:10:55,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 14:10:55,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 14:10:55,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 14:10:55,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 14:10:55,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 14:10:55,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 14:10:55,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 14:10:55,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 14:10:55,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 14:10:55,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 14:10:55,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 14:10:55,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 14:10:55,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 14:10:55,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 14:10:55,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 14:10:55,797 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 14:10:55,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 14:10:55,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 14:10:55,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 14:10:55,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 14:10:55,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 14:10:55,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 14:10:55,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 14:10:55,799 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 14:10:55,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 14:10:55,799 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 14:10:55,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 14:10:55,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 14:10:55,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 14:10:55,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 14:10:55,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 14:10:55,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 14:10:55,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 14:10:55,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 14:10:55,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 14:10:55,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 14:10:55,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 14:10:55,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 14:10:55,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 14:10:55,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 [2022-07-13 14:10:56,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 14:10:56,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 14:10:56,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 14:10:56,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 14:10:56,089 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 14:10:56,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-13 14:10:56,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040e7b01b/d0451b40b897446cb01cbd2ccf280eae/FLAGb70ce1050 [2022-07-13 14:10:56,488 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 14:10:56,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2022-07-13 14:10:56,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040e7b01b/d0451b40b897446cb01cbd2ccf280eae/FLAGb70ce1050 [2022-07-13 14:10:56,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040e7b01b/d0451b40b897446cb01cbd2ccf280eae [2022-07-13 14:10:56,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 14:10:56,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 14:10:56,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 14:10:56,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 14:10:56,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 14:10:56,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eff957b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56, skipping insertion in model container [2022-07-13 14:10:56,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 14:10:56,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 14:10:56,642 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] [2022-07-13 14:10:56,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 14:10:56,694 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 14:10:56,704 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] [2022-07-13 14:10:56,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 14:10:56,732 INFO L208 MainTranslator]: Completed translation [2022-07-13 14:10:56,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56 WrapperNode [2022-07-13 14:10:56,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 14:10:56,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 14:10:56,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 14:10:56,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 14:10:56,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,774 INFO L137 Inliner]: procedures = 20, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2022-07-13 14:10:56,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 14:10:56,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 14:10:56,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 14:10:56,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 14:10:56,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 14:10:56,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 14:10:56,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 14:10:56,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 14:10:56,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (1/1) ... [2022-07-13 14:10:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 14:10:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 14:10:56,852 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) [2022-07-13 14:10:56,867 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 [2022-07-13 14:10:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 14:10:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure RANDOM_INPUT [2022-07-13 14:10:56,880 INFO L138 BoogieDeclarations]: Found implementation of procedure RANDOM_INPUT [2022-07-13 14:10:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2022-07-13 14:10:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 14:10:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2022-07-13 14:10:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 14:10:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 14:10:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-07-13 14:10:56,957 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 14:10:56,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 14:10:59,159 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 14:10:59,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 14:10:59,163 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 14:10:59,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:10:59 BoogieIcfgContainer [2022-07-13 14:10:59,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 14:10:59,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 14:10:59,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 14:10:59,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 14:10:59,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 02:10:56" (1/3) ... [2022-07-13 14:10:59,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454eebd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:10:59, skipping insertion in model container [2022-07-13 14:10:59,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:10:56" (2/3) ... [2022-07-13 14:10:59,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454eebd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:10:59, skipping insertion in model container [2022-07-13 14:10:59,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:10:59" (3/3) ... [2022-07-13 14:10:59,169 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2022-07-13 14:10:59,187 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 14:10:59,188 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 14:10:59,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 14:10:59,226 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@580014c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e83e5fd [2022-07-13 14:10:59,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 14:10:59,230 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) [2022-07-13 14:10:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 14:10:59,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:10:59,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:10:59,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:10:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:10:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash -254494899, now seen corresponding path program 1 times [2022-07-13 14:10:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 14:10:59,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962862863] [2022-07-13 14:10:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:10:59,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 14:10:59,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 14:10:59,255 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) [2022-07-13 14:10:59,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 14:10:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:10:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 14:10:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 14:10:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 14:10:59,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 14:10:59,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 14:10:59,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962862863] [2022-07-13 14:10:59,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962862863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:10:59,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:10:59,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 14:10:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789878] [2022-07-13 14:10:59,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:10:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 14:10:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 14:10:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 14:10:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 14:10:59,652 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) [2022-07-13 14:10:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:10:59,665 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-07-13 14:10:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 14:10:59,668 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 [2022-07-13 14:10:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:10:59,672 INFO L225 Difference]: With dead ends: 39 [2022-07-13 14:10:59,672 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 14:10:59,674 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 [2022-07-13 14:10:59,677 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 [2022-07-13 14:10:59,678 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] [2022-07-13 14:10:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 14:10:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 14:10:59,705 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) [2022-07-13 14:10:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-13 14:10:59,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2022-07-13 14:10:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:10:59,707 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-13 14:10:59,707 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) [2022-07-13 14:10:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-13 14:10:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 14:10:59,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:10:59,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:10:59,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 14:10:59,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 14:10:59,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:10:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:10:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2084909879, now seen corresponding path program 1 times [2022-07-13 14:10:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 14:10:59,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109489005] [2022-07-13 14:10:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:10:59,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 14:10:59,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 14:10:59,922 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) [2022-07-13 14:10:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 14:11:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:11:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 14:11:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 14:11:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 14:11:00,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 14:11:00,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 14:11:00,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109489005] [2022-07-13 14:11:00,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109489005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:11:00,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:11:00,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 14:11:00,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92516838] [2022-07-13 14:11:00,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:11:00,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 14:11:00,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 14:11:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 14:11:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 14:11:00,309 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) [2022-07-13 14:11:02,443 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 [] [2022-07-13 14:11:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:11:02,444 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-07-13 14:11:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 14:11:02,491 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 [2022-07-13 14:11:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:11:02,492 INFO L225 Difference]: With dead ends: 45 [2022-07-13 14:11:02,492 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 14:11:02,492 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 [2022-07-13 14:11:02,493 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 [2022-07-13 14:11:02,494 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] [2022-07-13 14:11:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 14:11:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-13 14:11:02,499 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) [2022-07-13 14:11:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-13 14:11:02,500 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-07-13 14:11:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:11:02,500 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-13 14:11:02,500 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) [2022-07-13 14:11:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-13 14:11:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 14:11:02,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:11:02,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:11:02,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 14:11:02,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 14:11:02,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:11:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:11:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 371954385, now seen corresponding path program 1 times [2022-07-13 14:11:02,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 14:11:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444211292] [2022-07-13 14:11:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:11:02,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 14:11:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 14:11:02,705 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) [2022-07-13 14:11:02,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 14:11:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:11:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 14:11:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 14:11:09,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 14:11:09,084 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 [2022-07-13 14:11:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 14:11:09,391 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-13 14:11:09,392 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 [2022-07-13 14:11:11,847 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-13 14:11:11,848 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