./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/filter2_reinit.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_reinit.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 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:13:08,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:13:08,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:13:09,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:13:09,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:13:09,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:13:09,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:13:09,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:13:09,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:13:09,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:13:09,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:13:09,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:13:09,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:13:09,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:13:09,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:13:09,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:13:09,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:13:09,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:13:09,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:13:09,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:13:09,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:13:09,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:13:09,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:13:09,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:13:09,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:13:09,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:13:09,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:13:09,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:13:09,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:13:09,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:13:09,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:13:09,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:13:09,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:13:09,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:13:09,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:13:09,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:13:09,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:13:09,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:13:09,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:13:09,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:13:09,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:13:09,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:13:09,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:13:09,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:13:09,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:13:09,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:13:09,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:13:09,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:13:09,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:13:09,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:13:09,080 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:13:09,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:13:09,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:13:09,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:13:09,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:13:09,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:13:09,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:13:09,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:13:09,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:13:09,082 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:13:09,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:13:09,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:13:09,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:13:09,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:13:09,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:13:09,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:13:09,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:13:09,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:13:09,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:13:09,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:13:09,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:13:09,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:13:09,085 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:13:09,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:13:09,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:13:09,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:13:09,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 [2021-12-14 13:13:09,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:13:09,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:13:09,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:13:09,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:13:09,307 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:13:09,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-14 13:13:09,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da53b1a0/45966d57e9c247fb90e38a262c063105/FLAGec9f85959 [2021-12-14 13:13:09,720 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:13:09,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-14 13:13:09,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da53b1a0/45966d57e9c247fb90e38a262c063105/FLAGec9f85959 [2021-12-14 13:13:09,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da53b1a0/45966d57e9c247fb90e38a262c063105 [2021-12-14 13:13:09,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:13:09,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:13:09,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:13:09,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:13:09,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:13:09,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5218f38b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09, skipping insertion in model container [2021-12-14 13:13:09,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:13:09,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:13:09,906 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_reinit.c[700,713] [2021-12-14 13:13:09,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:13:09,927 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:13:09,937 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_reinit.c[700,713] [2021-12-14 13:13:09,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:13:09,959 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:13:09,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09 WrapperNode [2021-12-14 13:13:09,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:13:09,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:13:09,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:13:09,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:13:09,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,983 INFO L137 Inliner]: procedures = 15, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-12-14 13:13:09,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:13:09,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:13:09,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:13:09,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:13:09,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:09,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:10,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:10,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:10,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:10,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:13:10,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:13:10,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:13:10,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:13:10,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (1/1) ... [2021-12-14 13:13:10,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:13:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:13:10,044 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) [2021-12-14 13:13:10,046 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 [2021-12-14 13:13:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:13:10,082 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 13:13:10,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 13:13:10,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:13:10,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:13:10,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:13:10,127 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:13:10,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:13:10,233 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:13:10,236 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:13:10,237 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:13:10,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:10 BoogieIcfgContainer [2021-12-14 13:13:10,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:13:10,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:13:10,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:13:10,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:13:10,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:13:09" (1/3) ... [2021-12-14 13:13:10,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a742c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:10, skipping insertion in model container [2021-12-14 13:13:10,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:09" (2/3) ... [2021-12-14 13:13:10,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a742c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:10, skipping insertion in model container [2021-12-14 13:13:10,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:10" (3/3) ... [2021-12-14 13:13:10,244 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_reinit.c [2021-12-14 13:13:10,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:13:10,249 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:13:10,285 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:13:10,292 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 [2021-12-14 13:13:10,292 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:13:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 13:13:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 13:13:10,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:13:10,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:13:10,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:13:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:13:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1343975806, now seen corresponding path program 1 times [2021-12-14 13:13:10,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:13:10,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214399713] [2021-12-14 13:13:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:13:10,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:13:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:13:10,419 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:13:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:13:10,471 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:13:10,472 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:13:10,473 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:13:10,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:13:10,477 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-14 13:13:10,479 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:13:10,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:13:10 BoogieIcfgContainer [2021-12-14 13:13:10,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:13:10,499 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:13:10,499 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:13:10,499 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:13:10,499 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:10" (3/4) ... [2021-12-14 13:13:10,501 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 13:13:10,502 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:13:10,502 INFO L158 Benchmark]: Toolchain (without parser) took 759.83ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 39.2MB in the end (delta: 20.1MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. [2021-12-14 13:13:10,503 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:13:10,503 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.50ms. Allocated memory is still 90.2MB. Free memory was 59.2MB in the beginning and 66.3MB in the end (delta: -7.2MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-12-14 13:13:10,504 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.31ms. Allocated memory is still 90.2MB. Free memory was 66.3MB in the beginning and 64.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:13:10,504 INFO L158 Benchmark]: Boogie Preprocessor took 30.44ms. Allocated memory is still 90.2MB. Free memory was 64.6MB in the beginning and 63.9MB in the end (delta: 705.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:13:10,507 INFO L158 Benchmark]: RCFGBuilder took 223.05ms. Allocated memory is still 90.2MB. Free memory was 63.5MB in the beginning and 54.3MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:13:10,508 INFO L158 Benchmark]: TraceAbstraction took 257.82ms. Allocated memory is still 90.2MB. Free memory was 53.9MB in the beginning and 39.6MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-14 13:13:10,509 INFO L158 Benchmark]: Witness Printer took 2.93ms. Allocated memory is still 90.2MB. Free memory is still 39.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:13:10,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.50ms. Allocated memory is still 90.2MB. Free memory was 59.2MB in the beginning and 66.3MB in the end (delta: -7.2MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.31ms. Allocated memory is still 90.2MB. Free memory was 66.3MB in the beginning and 64.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.44ms. Allocated memory is still 90.2MB. Free memory was 64.6MB in the beginning and 63.9MB in the end (delta: 705.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 223.05ms. Allocated memory is still 90.2MB. Free memory was 63.5MB in the beginning and 54.3MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 257.82ms. Allocated memory is still 90.2MB. Free memory was 53.9MB in the beginning and 39.6MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 2.93ms. Allocated memory is still 90.2MB. Free memory is still 39.6MB. 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: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of to_real at line 31, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51. Possible FailurePath: [L23] double E, E0, E1, S0, S1, S; [L24] int i; [L26] E = __VERIFIER_nondet_double() [L27] E0 = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L28] RET assume_abort_if_not(E >= 0. && E <= 1.) [L29] CALL assume_abort_if_not(E0 >= 0. && E0 <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L29] RET assume_abort_if_not(E0 >= 0. && E0 <= 1.) [L31] S0 = 0 [L32] S = 0 [L34] i = 0 VAL [i=0] [L34] COND TRUE i <= 1000000 [L36] E1 = E0 [L37] E0 = E [L39] E = __VERIFIER_nondet_double() [L40] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(E >= 0. && E <= 1.) VAL [E=50, E=51, E=49, i=0] [L42] COND TRUE __VERIFIER_nondet_int() [L43] E1 = E [L44] E0 = E [L45] S0 = E [L46] S = E VAL [E=50, E=50, E=50, i=0, S=50, S0=50] [L49] S1 = S0 [L50] S0 = S [L51] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L53] CALL __VERIFIER_assert(S >= -4. && S <= 4.) [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-14 13:13:10,546 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_reinit.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 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:13:12,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:13:12,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:13:12,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:13:12,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:13:12,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:13:12,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:13:12,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:13:12,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:13:12,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:13:12,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:13:12,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:13:12,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:13:12,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:13:12,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:13:12,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:13:12,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:13:12,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:13:12,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:13:12,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:13:12,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:13:12,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:13:12,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:13:12,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:13:12,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:13:12,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:13:12,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:13:12,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:13:12,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:13:12,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:13:12,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:13:12,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:13:12,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:13:12,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:13:12,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:13:12,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:13:12,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:13:12,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:13:12,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:13:12,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:13:12,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:13:12,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 13:13:12,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:13:12,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:13:12,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:13:12,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:13:12,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:13:12,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:13:12,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:13:12,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:13:12,252 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:13:12,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:13:12,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:13:12,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:13:12,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:13:12,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:13:12,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:13:12,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:13:12,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 13:13:12,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 13:13:12,254 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 13:13:12,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:13:12,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:13:12,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:13:12,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:13:12,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:13:12,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:13:12,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:13:12,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:13:12,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:13:12,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:13:12,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:13:12,256 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 13:13:12,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 13:13:12,257 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:13:12,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:13:12,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:13:12,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:13:12,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 13:13:12,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 [2021-12-14 13:13:12,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:13:12,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:13:12,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:13:12,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:13:12,528 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:13:12,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-14 13:13:12,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6b5b5f15/bf3a17903ebb4408977c1e33aeab51ee/FLAG10852958d [2021-12-14 13:13:12,936 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:13:12,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-14 13:13:12,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6b5b5f15/bf3a17903ebb4408977c1e33aeab51ee/FLAG10852958d [2021-12-14 13:13:12,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6b5b5f15/bf3a17903ebb4408977c1e33aeab51ee [2021-12-14 13:13:12,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:13:12,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:13:12,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:13:12,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:13:12,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:13:12,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:12" (1/1) ... [2021-12-14 13:13:12,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3432f014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:12, skipping insertion in model container [2021-12-14 13:13:12,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:12" (1/1) ... [2021-12-14 13:13:12,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:13:12,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:13:13,104 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_reinit.c[700,713] [2021-12-14 13:13:13,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:13:13,138 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:13:13,184 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_reinit.c[700,713] [2021-12-14 13:13:13,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:13:13,210 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:13:13,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13 WrapperNode [2021-12-14 13:13:13,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:13:13,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:13:13,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:13:13,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:13:13,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,243 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-12-14 13:13:13,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:13:13,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:13:13,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:13:13,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:13:13,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:13:13,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:13:13,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:13:13,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:13:13,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (1/1) ... [2021-12-14 13:13:13,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:13:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:13:13,300 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) [2021-12-14 13:13:13,324 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 [2021-12-14 13:13:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:13:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 13:13:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 13:13:13,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 13:13:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:13:13,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:13:13,371 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:13:13,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:13:15,664 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:13:15,668 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:13:15,668 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:13:15,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:15 BoogieIcfgContainer [2021-12-14 13:13:15,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:13:15,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:13:15,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:13:15,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:13:15,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:13:12" (1/3) ... [2021-12-14 13:13:15,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7892b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:15, skipping insertion in model container [2021-12-14 13:13:15,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:13" (2/3) ... [2021-12-14 13:13:15,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7892b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:15, skipping insertion in model container [2021-12-14 13:13:15,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:15" (3/3) ... [2021-12-14 13:13:15,680 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_reinit.c [2021-12-14 13:13:15,683 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:13:15,683 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:13:15,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:13:15,719 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 [2021-12-14 13:13:15,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:13:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 13:13:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 13:13:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:13:15,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:13:15,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:13:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:13:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 526466326, now seen corresponding path program 1 times [2021-12-14 13:13:15,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:13:15,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617473083] [2021-12-14 13:13:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:13:15,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:13:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:13:15,744 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) [2021-12-14 13:13:15,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 13:13:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:13:16,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-14 13:13:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:13:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 13:13:16,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:13:16,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:13:16,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617473083] [2021-12-14 13:13:16,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617473083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:13:16,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:13:16,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:13:16,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367192590] [2021-12-14 13:13:16,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:13:16,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:13:16,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:13:16,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:13:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:13:16,909 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 13:13:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:13:16,922 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-12-14 13:13:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:13:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-12-14 13:13:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:13:16,932 INFO L225 Difference]: With dead ends: 41 [2021-12-14 13:13:16,932 INFO L226 Difference]: Without dead ends: 18 [2021-12-14 13:13:16,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:13:16,936 INFO L933 BasicCegarLoop]: 25 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, 25 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 [2021-12-14 13:13:16,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:13:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-14 13:13:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-14 13:13:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 13:13:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-14 13:13:16,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 23 [2021-12-14 13:13:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:13:16,957 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-14 13:13:16,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 13:13:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-14 13:13:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 13:13:16,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:13:16,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:13:16,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-14 13:13:17,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:13:17,159 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:13:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:13:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -398587304, now seen corresponding path program 1 times [2021-12-14 13:13:17,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:13:17,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978186946] [2021-12-14 13:13:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:13:17,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:13:17,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:13:17,162 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) [2021-12-14 13:13:17,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 13:13:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:13:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 13:13:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates...