./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 ae007674 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-dev-ae00767 [2021-12-27 23:23:57,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:23:57,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:23:58,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:23:58,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:23:58,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:23:58,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:23:58,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:23:58,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:23:58,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:23:58,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:23:58,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:23:58,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:23:58,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:23:58,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:23:58,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:23:58,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:23:58,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:23:58,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:23:58,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:23:58,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:23:58,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:23:58,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:23:58,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:23:58,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:23:58,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:23:58,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:23:58,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:23:58,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:23:58,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:23:58,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:23:58,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:23:58,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:23:58,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:23:58,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:23:58,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:23:58,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:23:58,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:23:58,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:23:58,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:23:58,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:23:58,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:23:58,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:23:58,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:23:58,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:23:58,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:23:58,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:23:58,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:23:58,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:23:58,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:23:58,107 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:23:58,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:23:58,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:23:58,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:23:58,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:23:58,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:23:58,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:23:58,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:23:58,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:23:58,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:23:58,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:23:58,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:23:58,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:23:58,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:23:58,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:23:58,115 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:23:58,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:23:58,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:23:58,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 [2021-12-27 23:23:58,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:23:58,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:23:58,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:23:58,401 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:23:58,401 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:23:58,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2021-12-27 23:23:58,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b294492b/d797dc75351a491ab001c3e7f30fd749/FLAGd471dce3b [2021-12-27 23:23:58,805 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:23:58,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2021-12-27 23:23:58,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b294492b/d797dc75351a491ab001c3e7f30fd749/FLAGd471dce3b [2021-12-27 23:23:58,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b294492b/d797dc75351a491ab001c3e7f30fd749 [2021-12-27 23:23:58,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:23:58,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:23:58,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:23:58,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:23:58,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:23:58,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:23:58" (1/1) ... [2021-12-27 23:23:58,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e0a59c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:58, skipping insertion in model container [2021-12-27 23:23:58,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:23:58" (1/1) ... [2021-12-27 23:23:58,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:23:58,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:23:58,917 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] [2021-12-27 23:23:58,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:23:58,953 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:23:58,990 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] [2021-12-27 23:23:58,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:23:59,006 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:23:59,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59 WrapperNode [2021-12-27 23:23:59,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:23:59,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:23:59,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:23:59,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:23:59,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,046 INFO L137 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2021-12-27 23:23:59,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:23:59,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:23:59,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:23:59,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:23:59,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:23:59,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:23:59,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:23:59,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:23:59,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (1/1) ... [2021-12-27 23:23:59,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:23:59,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:23:59,110 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) [2021-12-27 23:23:59,130 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 [2021-12-27 23:23:59,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:23:59,140 INFO L130 BoogieDeclarations]: Found specification of procedure RANDOM_INPUT [2021-12-27 23:23:59,140 INFO L138 BoogieDeclarations]: Found implementation of procedure RANDOM_INPUT [2021-12-27 23:23:59,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:23:59,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-12-27 23:23:59,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-12-27 23:23:59,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:23:59,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:23:59,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-12-27 23:23:59,217 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:23:59,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:23:59,343 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:23:59,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:23:59,355 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:23:59,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:23:59 BoogieIcfgContainer [2021-12-27 23:23:59,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:23:59,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:23:59,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:23:59,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:23:59,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:23:58" (1/3) ... [2021-12-27 23:23:59,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c4b802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:23:59, skipping insertion in model container [2021-12-27 23:23:59,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:23:59" (2/3) ... [2021-12-27 23:23:59,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c4b802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:23:59, skipping insertion in model container [2021-12-27 23:23:59,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:23:59" (3/3) ... [2021-12-27 23:23:59,373 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2021-12-27 23:23:59,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:23:59,382 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:23:59,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:23:59,455 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:23:59,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:23:59,476 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) [2021-12-27 23:23:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 23:23:59,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:23:59,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:23:59,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:23:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:23:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash -254494899, now seen corresponding path program 1 times [2021-12-27 23:23:59,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:23:59,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921175077] [2021-12-27 23:23:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:23:59,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:23:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:23:59,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:23:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:23:59,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-27 23:23:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:23:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 23:23:59,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:23:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921175077] [2021-12-27 23:23:59,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921175077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:23:59,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:23:59,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:23:59,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408207009] [2021-12-27 23:23:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:23:59,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 23:23:59,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:23:59,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 23:23:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:23:59,663 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) [2021-12-27 23:23:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:23:59,677 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-12-27 23:23:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 23:23:59,679 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 [2021-12-27 23:23:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:23:59,684 INFO L225 Difference]: With dead ends: 39 [2021-12-27 23:23:59,684 INFO L226 Difference]: Without dead ends: 19 [2021-12-27 23:23:59,689 INFO L932 BasicCegarLoop]: 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 [2021-12-27 23:23:59,691 INFO L933 BasicCegarLoop]: 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 [2021-12-27 23:23:59,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:23:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-27 23:23:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-27 23:23:59,720 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) [2021-12-27 23:23:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-27 23:23:59,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2021-12-27 23:23:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:23:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-27 23:23:59,722 INFO L471 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) [2021-12-27 23:23:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-27 23:23:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 23:23:59,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:23:59,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:23:59,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:23:59,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:23:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:23:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2084909879, now seen corresponding path program 1 times [2021-12-27 23:23:59,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:23:59,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693883530] [2021-12-27 23:23:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:23:59,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:23:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:23:59,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:23:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:23:59,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-27 23:23:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:23:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 23:23:59,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:23:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693883530] [2021-12-27 23:23:59,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693883530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:23:59,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:23:59,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:23:59,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143571439] [2021-12-27 23:23:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:23:59,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:23:59,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:23:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:23:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:23:59,834 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) [2021-12-27 23:23:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:23:59,852 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-27 23:23:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:23:59,852 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 [2021-12-27 23:23:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:23:59,853 INFO L225 Difference]: With dead ends: 45 [2021-12-27 23:23:59,853 INFO L226 Difference]: Without dead ends: 30 [2021-12-27 23:23:59,854 INFO L932 BasicCegarLoop]: 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 [2021-12-27 23:23:59,854 INFO L933 BasicCegarLoop]: 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 [2021-12-27 23:23:59,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:23:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-27 23:23:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-27 23:23:59,859 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) [2021-12-27 23:23:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-27 23:23:59,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2021-12-27 23:23:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:23:59,861 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-27 23:23:59,861 INFO L471 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) [2021-12-27 23:23:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-27 23:23:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 23:23:59,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:23:59,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:23:59,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 23:23:59,862 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:23:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:23:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 371954385, now seen corresponding path program 1 times [2021-12-27 23:23:59,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:23:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563156506] [2021-12-27 23:23:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:23:59,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:23:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:23:59,919 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-27 23:23:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:23:59,973 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-27 23:23:59,973 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-27 23:23:59,973 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 23:23:59,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:23:59,977 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-27 23:23:59,978 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 23:24:00,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:24:00 BoogieIcfgContainer [2021-12-27 23:24:00,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 23:24:00,003 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 23:24:00,003 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 23:24:00,003 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 23:24:00,004 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:23:59" (3/4) ... [2021-12-27 23:24:00,006 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-27 23:24:00,006 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 23:24:00,006 INFO L158 Benchmark]: Toolchain (without parser) took 1186.34ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.5MB in the beginning and 33.9MB in the end (delta: 3.6MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2021-12-27 23:24:00,007 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:24:00,013 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.55ms. Allocated memory is still 58.7MB. Free memory was 37.2MB in the beginning and 41.6MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-27 23:24:00,016 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.72ms. Allocated memory is still 58.7MB. Free memory was 41.4MB in the beginning and 39.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:24:00,018 INFO L158 Benchmark]: Boogie Preprocessor took 36.03ms. Allocated memory is still 58.7MB. Free memory was 39.8MB in the beginning and 38.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:24:00,019 INFO L158 Benchmark]: RCFGBuilder took 272.66ms. Allocated memory is still 58.7MB. Free memory was 38.5MB in the beginning and 28.2MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-27 23:24:00,020 INFO L158 Benchmark]: TraceAbstraction took 644.57ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 27.6MB in the beginning and 34.3MB in the end (delta: -6.7MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-12-27 23:24:00,021 INFO L158 Benchmark]: Witness Printer took 2.49ms. Allocated memory is still 71.3MB. Free memory was 34.3MB in the beginning and 33.9MB in the end (delta: 407.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:24:00,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.55ms. Allocated memory is still 58.7MB. Free memory was 37.2MB in the beginning and 41.6MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.72ms. Allocated memory is still 58.7MB. Free memory was 41.4MB in the beginning and 39.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.03ms. Allocated memory is still 58.7MB. Free memory was 39.8MB in the beginning and 38.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 272.66ms. Allocated memory is still 58.7MB. Free memory was 38.5MB in the beginning and 28.2MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 644.57ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 27.6MB in the beginning and 34.3MB in the end (delta: -6.7MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Witness Printer took 2.49ms. Allocated memory is still 71.3MB. Free memory was 34.3MB in the beginning and 33.9MB in the end (delta: 407.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 43, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L19] BOOLEAN INIT; [L20] float P, X; [L32] static float E[2], S[2]; VAL [E={4:0}, INIT=0, P=0, S={5:0}, X=0] [L52] CALL, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=0, S={5:0}, X=0] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L26] CALL assume_abort_if_not(x >= -10.f && x <= 10.f) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, E={4:0}, INIT=0, P=0, S={5:0}, X=0] [L26] RET assume_abort_if_not(x >= -10.f && x <= 10.f) [L27] return x; VAL [\result=57, E={4:0}, INIT=0, P=0, S={5:0}, x=57, X=0] [L52] RET, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=0, RANDOM_INPUT()=57, S={5:0}, X=0] [L52] X = RANDOM_INPUT() [L53] INIT = TRUE VAL [E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L54] COND TRUE \read(TRUE) VAL [E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L55] CALL, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L26] CALL assume_abort_if_not(x >= -10.f && x <= 10.f) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, E={4:0}, INIT=1, P=0, S={5:0}, X=57] [L26] RET assume_abort_if_not(x >= -10.f && x <= 10.f) [L27] return x; VAL [\result=52, E={4:0}, INIT=1, P=0, S={5:0}, x=52, X=57] [L55] RET, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=1, P=0, RANDOM_INPUT()=52, S={5:0}, X=57] [L55] X = RANDOM_INPUT() [L56] CALL filter2 () [L33] COND TRUE \read(INIT) [L34] S[0] = X [L35] P = X [L36] E[0] = X VAL [E={4:0}, INIT=1, P=52, S={5:0}, X=52] [L46] EXPR E[0] [L46] E[1] = E[0] [L46] E[0] = X [L47] EXPR S[0] [L47] S[1] = S[0] [L47] S[0] = P VAL [E={4:0}, INIT=1, P=52, S={5:0}, X=52] [L56] RET filter2 () [L57] INIT = FALSE VAL [E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L54] COND TRUE \read(TRUE) VAL [E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L55] CALL, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L26] CALL assume_abort_if_not(x >= -10.f && x <= 10.f) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, E={4:0}, INIT=0, P=52, S={5:0}, X=52] [L26] RET assume_abort_if_not(x >= -10.f && x <= 10.f) [L27] return x; VAL [\result=49, E={4:0}, INIT=0, P=52, S={5:0}, X=52, x=49] [L55] RET, EXPR RANDOM_INPUT() VAL [E={4:0}, INIT=0, P=52, RANDOM_INPUT()=49, S={5:0}, X=52] [L55] X = RANDOM_INPUT() [L56] CALL filter2 () [L33] COND FALSE !(\read(INIT)) [L39] EXPR E[0] [L40] EXPR E[1] [L41] EXPR S[0] [L42] EXPR S[1] [L38-L42] P = (((((0.4677826f * X) - (E[0] * 0.7700725f)) + (E[1] * 0.4344376f)) + (S[0] * 1.5419f)) - (S[1] * 0.6740477f)) [L43] CALL __VERIFIER_assert(P >= -15.f && P <= 15.f) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, E={4:0}, INIT=0, S={5:0}, X=49] [L14] reach_error() VAL [\old(cond)=0, cond=0, E={4:0}, INIT=0, S={5:0}, X=49] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 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 [2021-12-27 23:24:00,059 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-dev-ae00767 [2021-12-27 23:24:01,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:24:01,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:24:01,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:24:01,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:24:01,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:24:01,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:24:01,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:24:01,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:24:01,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:24:01,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:24:01,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:24:01,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:24:01,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:24:01,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:24:01,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:24:01,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:24:01,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:24:01,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:24:01,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:24:01,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:24:01,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:24:01,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:24:01,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:24:01,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:24:01,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:24:01,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:24:01,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:24:01,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:24:01,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:24:01,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:24:01,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:24:01,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:24:01,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:24:01,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:24:01,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:24:01,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:24:01,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:24:01,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:24:01,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:24:01,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:24:01,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-27 23:24:01,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:24:01,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:24:01,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:24:01,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:24:01,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:24:01,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:24:01,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:24:01,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:24:01,826 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:24:01,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:24:01,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:24:01,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:24:01,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:24:01,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:24:01,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:24:01,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:24:01,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-27 23:24:01,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-27 23:24:01,828 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-27 23:24:01,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:24:01,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:24:01,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:24:01,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:24:01,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:24:01,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:24:01,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:24:01,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:24:01,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:24:01,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:24:01,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:24:01,834 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-27 23:24:01,834 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-27 23:24:01,834 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:24:01,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:24:01,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:24:01,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-27 23:24:01,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc48f0b37b49094aa2ed7125525fbb7b9a95c5af6fff8426a24c4fcf99bb295 [2021-12-27 23:24:02,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:24:02,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:24:02,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:24:02,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:24:02,179 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:24:02,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2021-12-27 23:24:02,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b03ac775/4a1730e3195b4ebc8dfd191621ee357d/FLAG3e129c447 [2021-12-27 23:24:02,564 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:24:02,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2021-12-27 23:24:02,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b03ac775/4a1730e3195b4ebc8dfd191621ee357d/FLAG3e129c447 [2021-12-27 23:24:03,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b03ac775/4a1730e3195b4ebc8dfd191621ee357d [2021-12-27 23:24:03,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:24:03,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:24:03,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:24:03,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:24:03,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:24:03,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19994c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03, skipping insertion in model container [2021-12-27 23:24:03,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:24:03,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:24:03,117 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] [2021-12-27 23:24:03,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:24:03,148 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:24:03,178 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] [2021-12-27 23:24:03,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:24:03,203 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:24:03,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03 WrapperNode [2021-12-27 23:24:03,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:24:03,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:24:03,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:24:03,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:24:03,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,250 INFO L137 Inliner]: procedures = 20, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2021-12-27 23:24:03,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:24:03,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:24:03,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:24:03,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:24:03,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:24:03,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:24:03,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:24:03,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:24:03,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (1/1) ... [2021-12-27 23:24:03,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:24:03,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:24:03,320 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) [2021-12-27 23:24:03,335 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 [2021-12-27 23:24:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:24:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure RANDOM_INPUT [2021-12-27 23:24:03,351 INFO L138 BoogieDeclarations]: Found implementation of procedure RANDOM_INPUT [2021-12-27 23:24:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2021-12-27 23:24:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-27 23:24:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2021-12-27 23:24:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:24:03,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:24:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-12-27 23:24:03,436 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:24:03,437 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:24:05,608 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:24:05,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:24:05,612 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:24:05,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:05 BoogieIcfgContainer [2021-12-27 23:24:05,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:24:05,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:24:05,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:24:05,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:24:05,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:24:03" (1/3) ... [2021-12-27 23:24:05,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e9374e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:24:05, skipping insertion in model container [2021-12-27 23:24:05,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:03" (2/3) ... [2021-12-27 23:24:05,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e9374e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:24:05, skipping insertion in model container [2021-12-27 23:24:05,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:05" (3/3) ... [2021-12-27 23:24:05,625 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2021-12-27 23:24:05,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:24:05,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:24:05,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:24:05,661 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:24:05,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:24:05,670 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) [2021-12-27 23:24:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 23:24:05,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:05,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:05,674 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash -254494899, now seen corresponding path program 1 times [2021-12-27 23:24:05,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:24:05,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498710419] [2021-12-27 23:24:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:05,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:24:05,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:24:05,688 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) [2021-12-27 23:24:05,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-27 23:24:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-27 23:24:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:24:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-27 23:24:06,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:24:06,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 23:24:06,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498710419] [2021-12-27 23:24:06,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498710419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:24:06,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:24:06,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:24:06,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910841530] [2021-12-27 23:24:06,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:24:06,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 23:24:06,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 23:24:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 23:24:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:24:06,203 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) [2021-12-27 23:24:06,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:24:06,224 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-12-27 23:24:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 23:24:06,227 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 [2021-12-27 23:24:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:24:06,232 INFO L225 Difference]: With dead ends: 39 [2021-12-27 23:24:06,233 INFO L226 Difference]: Without dead ends: 19 [2021-12-27 23:24:06,235 INFO L932 BasicCegarLoop]: 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 [2021-12-27 23:24:06,240 INFO L933 BasicCegarLoop]: 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 [2021-12-27 23:24:06,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:24:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-27 23:24:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-27 23:24:06,275 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) [2021-12-27 23:24:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-27 23:24:06,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2021-12-27 23:24:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:24:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-27 23:24:06,289 INFO L471 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) [2021-12-27 23:24:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-27 23:24:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 23:24:06,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:06,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:06,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:24:06,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 23:24:06,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2084909879, now seen corresponding path program 1 times [2021-12-27 23:24:06,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:24:06,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313977272] [2021-12-27 23:24:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:06,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:24:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:24:06,495 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) [2021-12-27 23:24:06,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-27 23:24:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 23:24:06,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:24:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:24:06,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:24:06,889 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 23:24:06,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313977272] [2021-12-27 23:24:06,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313977272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:24:06,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:24:06,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:24:06,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488601518] [2021-12-27 23:24:06,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:24:06,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:24:06,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 23:24:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:24:06,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:24:06,895 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) [2021-12-27 23:24:09,031 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 [] [2021-12-27 23:24:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:24:09,032 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-27 23:24:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:24:09,079 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 [2021-12-27 23:24:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:24:09,079 INFO L225 Difference]: With dead ends: 45 [2021-12-27 23:24:09,080 INFO L226 Difference]: Without dead ends: 30 [2021-12-27 23:24:09,080 INFO L932 BasicCegarLoop]: 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 [2021-12-27 23:24:09,081 INFO L933 BasicCegarLoop]: 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 [2021-12-27 23:24:09,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-27 23:24:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-27 23:24:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-27 23:24:09,086 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) [2021-12-27 23:24:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-27 23:24:09,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2021-12-27 23:24:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:24:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-27 23:24:09,090 INFO L471 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) [2021-12-27 23:24:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-27 23:24:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 23:24:09,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:09,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:09,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-27 23:24:09,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 23:24:09,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 371954385, now seen corresponding path program 1 times [2021-12-27 23:24:09,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:24:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172873539] [2021-12-27 23:24:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:09,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:24:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:24:09,305 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) [2021-12-27 23:24:09,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-27 23:24:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-27 23:24:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:24:14,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:24:14,869 INFO L387 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 [2021-12-27 23:24:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:24:15,192 INFO L353 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-27 23:24:15,192 INFO L387 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 [2021-12-27 23:24:18,364 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-27 23:24:18,364 INFO L387 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