./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/nla-digbench-scaling/freire2_valuebound5.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 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 12:22:10,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 12:22:10,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 12:22:10,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 12:22:10,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 12:22:10,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 12:22:10,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 12:22:10,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 12:22:10,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 12:22:10,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 12:22:10,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 12:22:10,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 12:22:10,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 12:22:10,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 12:22:10,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 12:22:10,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 12:22:10,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 12:22:10,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 12:22:10,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 12:22:10,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 12:22:10,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 12:22:10,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 12:22:10,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 12:22:10,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 12:22:10,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 12:22:10,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 12:22:10,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 12:22:10,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 12:22:10,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 12:22:10,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 12:22:10,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 12:22:10,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 12:22:10,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 12:22:10,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 12:22:10,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 12:22:10,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 12:22:10,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 12:22:10,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 12:22:10,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 12:22:10,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 12:22:10,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 12:22:10,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 12:22:10,273 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 12:22:10,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 12:22:10,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 12:22:10,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 12:22:10,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 12:22:10,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 12:22:10,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 12:22:10,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 12:22:10,275 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 12:22:10,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 12:22:10,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 12:22:10,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 12:22:10,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:22:10,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 12:22:10,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 12:22:10,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 12:22:10,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 12:22:10,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 12:22:10,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 12:22:10,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 12:22:10,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 12:22:10,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 12:22:10,279 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 12:22:10,279 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 [2023-02-14 12:22:10,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 12:22:10,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 12:22:10,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 12:22:10,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 12:22:10,473 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 12:22:10,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c [2023-02-14 12:22:11,473 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 12:22:11,690 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 12:22:11,690 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c [2023-02-14 12:22:11,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac7977eb/52f699a83994408aa283fd8fcf1a5b0c/FLAG1e7d84961 [2023-02-14 12:22:11,707 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac7977eb/52f699a83994408aa283fd8fcf1a5b0c [2023-02-14 12:22:11,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 12:22:11,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 12:22:11,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 12:22:11,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 12:22:11,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 12:22:11,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4dfa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11, skipping insertion in model container [2023-02-14 12:22:11,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 12:22:11,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 12:22:11,820 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2023-02-14 12:22:11,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:22:11,841 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 12:22:11,848 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2023-02-14 12:22:11,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:22:11,865 INFO L208 MainTranslator]: Completed translation [2023-02-14 12:22:11,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11 WrapperNode [2023-02-14 12:22:11,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 12:22:11,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 12:22:11,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 12:22:11,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 12:22:11,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,884 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2023-02-14 12:22:11,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 12:22:11,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 12:22:11,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 12:22:11,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 12:22:11,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,897 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 12:22:11,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 12:22:11,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 12:22:11,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 12:22:11,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (1/1) ... [2023-02-14 12:22:11,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:22:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:22:11,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 12:22:11,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 12:22:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 12:22:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 12:22:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 12:22:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 12:22:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 12:22:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 12:22:11,981 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 12:22:11,982 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 12:22:12,062 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 12:22:12,065 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 12:22:12,065 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 12:22:12,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:22:12 BoogieIcfgContainer [2023-02-14 12:22:12,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 12:22:12,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 12:22:12,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 12:22:12,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 12:22:12,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:22:11" (1/3) ... [2023-02-14 12:22:12,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf61edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:22:12, skipping insertion in model container [2023-02-14 12:22:12,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:11" (2/3) ... [2023-02-14 12:22:12,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf61edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:22:12, skipping insertion in model container [2023-02-14 12:22:12,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:22:12" (3/3) ... [2023-02-14 12:22:12,085 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_valuebound5.c [2023-02-14 12:22:12,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 12:22:12,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 12:22:12,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 12:22:12,159 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1eba7494, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 12:22:12,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 12:22:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:22:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 12:22:12,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:22:12,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:22:12,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:22:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:22:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash -589224774, now seen corresponding path program 1 times [2023-02-14 12:22:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:22:12,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699594349] [2023-02-14 12:22:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:22:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:22:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:22:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699594349] [2023-02-14 12:22:12,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 12:22:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344881197] [2023-02-14 12:22:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:22:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:22:12,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 12:22:12,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 12:22:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:22:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 12:22:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:22:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 12:22:12,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:22:12,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344881197] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:22:12,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:22:12,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 12:22:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070405746] [2023-02-14 12:22:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:22:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 12:22:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:22:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 12:22:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:22:12,392 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 12:22:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:22:12,419 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2023-02-14 12:22:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 12:22:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 12:22:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:22:12,424 INFO L225 Difference]: With dead ends: 41 [2023-02-14 12:22:12,424 INFO L226 Difference]: Without dead ends: 18 [2023-02-14 12:22:12,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:22:12,428 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2023-02-14 12:22:12,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:22:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-14 12:22:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-14 12:22:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 12:22:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-02-14 12:22:12,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2023-02-14 12:22:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:22:12,466 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-02-14 12:22:12,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 12:22:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-02-14 12:22:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 12:22:12,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:22:12,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:22:12,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 12:22:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 12:22:12,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:22:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:22:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1187450884, now seen corresponding path program 1 times [2023-02-14 12:22:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:22:12,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393584870] [2023-02-14 12:22:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:22:12,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:22:12,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187380326] [2023-02-14 12:22:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:12,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:22:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:22:12,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 12:22:12,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 12:22:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:22:12,730 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 12:22:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:22:12,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-14 12:22:12,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-14 12:22:12,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 12:22:12,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 12:22:12,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 12:22:12,964 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-02-14 12:22:12,966 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 12:22:12,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 12:22:12 BoogieIcfgContainer [2023-02-14 12:22:12,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 12:22:12,978 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 12:22:12,978 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 12:22:12,978 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 12:22:12,979 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:22:12" (3/4) ... [2023-02-14 12:22:12,980 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-14 12:22:12,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 12:22:12,981 INFO L158 Benchmark]: Toolchain (without parser) took 1271.32ms. Allocated memory was 146.8MB in the beginning and 178.3MB in the end (delta: 31.5MB). Free memory was 115.5MB in the beginning and 138.1MB in the end (delta: -22.6MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2023-02-14 12:22:12,981 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 111.1MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 12:22:12,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.27ms. Allocated memory is still 146.8MB. Free memory was 115.0MB in the beginning and 104.7MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 12:22:12,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.16ms. Allocated memory is still 146.8MB. Free memory was 104.3MB in the beginning and 103.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 12:22:12,982 INFO L158 Benchmark]: Boogie Preprocessor took 12.85ms. Allocated memory is still 146.8MB. Free memory was 103.0MB in the beginning and 101.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 12:22:12,983 INFO L158 Benchmark]: RCFGBuilder took 167.29ms. Allocated memory is still 146.8MB. Free memory was 101.8MB in the beginning and 91.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 12:22:12,983 INFO L158 Benchmark]: TraceAbstraction took 910.19ms. Allocated memory was 146.8MB in the beginning and 178.3MB in the end (delta: 31.5MB). Free memory was 90.5MB in the beginning and 139.2MB in the end (delta: -48.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 12:22:12,985 INFO L158 Benchmark]: Witness Printer took 2.54ms. Allocated memory is still 178.3MB. Free memory was 139.0MB in the beginning and 138.1MB in the end (delta: 932.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 12:22:12,987 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 111.1MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.27ms. Allocated memory is still 146.8MB. Free memory was 115.0MB in the beginning and 104.7MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.16ms. Allocated memory is still 146.8MB. Free memory was 104.3MB in the beginning and 103.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.85ms. Allocated memory is still 146.8MB. Free memory was 103.0MB in the beginning and 101.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 167.29ms. Allocated memory is still 146.8MB. Free memory was 101.8MB in the beginning and 91.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 910.19ms. Allocated memory was 146.8MB in the beginning and 178.3MB in the end (delta: 31.5MB). Free memory was 90.5MB in the beginning and 139.2MB in the end (delta: -48.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.54ms. Allocated memory is still 178.3MB. Free memory was 139.0MB in the beginning and 138.1MB in the end (delta: 932.9kB). Peak memory consumption was 2.1MB. 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: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34, overapproximation of someBinaryDOUBLEComparisonOperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=5) [L14] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L28] RET assume_abort_if_not(a>=0 && a<=5) [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, r=1, s=13/4, x=2] [L33] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 27 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-02-14 12:22:13,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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/nla-digbench-scaling/freire2_valuebound5.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 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 12:22:14,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 12:22:14,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 12:22:14,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 12:22:14,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 12:22:14,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 12:22:14,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 12:22:14,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 12:22:14,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 12:22:14,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 12:22:14,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 12:22:14,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 12:22:14,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 12:22:14,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 12:22:14,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 12:22:14,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 12:22:14,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 12:22:14,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 12:22:14,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 12:22:14,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 12:22:14,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 12:22:14,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 12:22:14,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 12:22:14,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 12:22:14,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 12:22:14,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 12:22:14,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 12:22:14,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 12:22:14,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 12:22:14,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 12:22:14,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 12:22:14,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 12:22:14,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 12:22:14,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 12:22:14,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 12:22:14,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 12:22:14,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 12:22:14,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 12:22:14,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 12:22:14,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 12:22:14,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 12:22:14,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-14 12:22:14,958 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 12:22:14,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 12:22:14,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 12:22:14,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 12:22:14,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 12:22:14,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 12:22:14,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 12:22:14,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 12:22:14,961 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 12:22:14,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 12:22:14,961 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-14 12:22:14,962 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 12:22:14,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 12:22:14,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:22:14,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 12:22:14,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 12:22:14,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 12:22:14,964 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-14 12:22:14,964 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-14 12:22:14,964 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 12:22:14,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 12:22:14,965 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 12:22:14,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 12:22:14,965 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-14 12:22:14,965 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 12:22:14,965 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 [2023-02-14 12:22:15,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 12:22:15,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 12:22:15,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 12:22:15,188 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 12:22:15,189 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 12:22:15,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c [2023-02-14 12:22:16,094 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 12:22:16,305 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 12:22:16,306 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c [2023-02-14 12:22:16,311 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0634162/785a9cadaeac4dd6a5443c29d62c11cc/FLAGac0df2832 [2023-02-14 12:22:16,695 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0634162/785a9cadaeac4dd6a5443c29d62c11cc [2023-02-14 12:22:16,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 12:22:16,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 12:22:16,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 12:22:16,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 12:22:16,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 12:22:16,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e613e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16, skipping insertion in model container [2023-02-14 12:22:16,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 12:22:16,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 12:22:16,826 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2023-02-14 12:22:16,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:22:16,866 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 12:22:16,875 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2023-02-14 12:22:16,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:22:16,907 INFO L208 MainTranslator]: Completed translation [2023-02-14 12:22:16,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16 WrapperNode [2023-02-14 12:22:16,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 12:22:16,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 12:22:16,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 12:22:16,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 12:22:16,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,943 INFO L138 Inliner]: procedures = 15, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-02-14 12:22:16,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 12:22:16,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 12:22:16,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 12:22:16,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 12:22:16,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 12:22:16,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 12:22:16,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 12:22:16,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 12:22:16,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (1/1) ... [2023-02-14 12:22:16,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:22:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:22:17,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 12:22:17,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 12:22:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 12:22:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-14 12:22:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 12:22:17,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 12:22:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 12:22:17,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 12:22:17,089 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 12:22:17,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 12:22:19,446 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 12:22:19,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 12:22:19,450 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 12:22:19,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:22:19 BoogieIcfgContainer [2023-02-14 12:22:19,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 12:22:19,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 12:22:19,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 12:22:19,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 12:22:19,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:22:16" (1/3) ... [2023-02-14 12:22:19,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8e5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:22:19, skipping insertion in model container [2023-02-14 12:22:19,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:22:16" (2/3) ... [2023-02-14 12:22:19,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8e5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:22:19, skipping insertion in model container [2023-02-14 12:22:19,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:22:19" (3/3) ... [2023-02-14 12:22:19,457 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_valuebound5.c [2023-02-14 12:22:19,467 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 12:22:19,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 12:22:19,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 12:22:19,504 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7211336b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 12:22:19,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 12:22:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:22:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 12:22:19,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:22:19,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:22:19,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:22:19,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:22:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash -589224774, now seen corresponding path program 1 times [2023-02-14 12:22:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 12:22:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084079172] [2023-02-14 12:22:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:19,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 12:22:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 12:22:19,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 12:22:19,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-14 12:22:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:22:19,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 12:22:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:22:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 12:22:19,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:22:19,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 12:22:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084079172] [2023-02-14 12:22:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084079172] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:22:19,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:22:19,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 12:22:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512284293] [2023-02-14 12:22:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:22:19,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 12:22:19,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 12:22:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 12:22:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:22:19,771 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 12:22:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:22:19,800 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2023-02-14 12:22:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 12:22:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 12:22:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:22:19,807 INFO L225 Difference]: With dead ends: 41 [2023-02-14 12:22:19,807 INFO L226 Difference]: Without dead ends: 18 [2023-02-14 12:22:19,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:22:19,814 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2023-02-14 12:22:19,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:22:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-14 12:22:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-14 12:22:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 12:22:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-02-14 12:22:19,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2023-02-14 12:22:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:22:19,840 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-02-14 12:22:19,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 12:22:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-02-14 12:22:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 12:22:19,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:22:19,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:22:19,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-14 12:22:20,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 12:22:20,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:22:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:22:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1187450884, now seen corresponding path program 1 times [2023-02-14 12:22:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 12:22:20,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51787585] [2023-02-14 12:22:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:20,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 12:22:20,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 12:22:20,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 12:22:20,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-14 12:22:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:22:20,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 12:22:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:22:20,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-14 12:22:20,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [16207548] [2023-02-14 12:22:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:20,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 12:22:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 12:22:20,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-14 12:22:20,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-02-14 12:22:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:22:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 12:22:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:22:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 12:22:20,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:22:20,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 12:22:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51787585] [2023-02-14 12:22:20,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:22:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [16207548] [2023-02-14 12:22:20,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [16207548] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:22:20,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:22:20,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:22:20,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919976814] [2023-02-14 12:22:20,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:22:20,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 12:22:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 12:22:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 12:22:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:22:20,510 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 12:22:22,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:24,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:26,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:29,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:31,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:33,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:35,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:38,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:22:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:22:38,274 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-02-14 12:22:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:22:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 12:22:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:22:38,374 INFO L225 Difference]: With dead ends: 33 [2023-02-14 12:22:38,374 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 12:22:38,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 12:22:38,375 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2023-02-14 12:22:38,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 17.7s Time] [2023-02-14 12:22:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 12:22:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-14 12:22:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 12:22:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-14 12:22:38,394 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 9 [2023-02-14 12:22:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:22:38,395 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-14 12:22:38,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 12:22:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-14 12:22:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 12:22:38,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:22:38,395 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:22:38,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-02-14 12:22:38,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-02-14 12:22:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 12:22:38,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:22:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:22:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1170702338, now seen corresponding path program 1 times [2023-02-14 12:22:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 12:22:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791768747] [2023-02-14 12:22:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:38,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 12:22:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 12:22:38,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 12:22:38,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-14 12:22:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:22:39,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 12:22:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:22:39,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-14 12:22:39,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1918624901] [2023-02-14 12:22:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:22:39,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 12:22:39,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 12:22:39,258 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-14 12:22:39,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-02-14 12:22:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:22:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 12:22:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:22:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 12:22:41,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:22:47,574 WARN L837 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|))) is different from false [2023-02-14 12:22:49,605 WARN L859 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|))) is different from true [2023-02-14 12:23:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 12:23:18,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 12:23:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791768747] [2023-02-14 12:23:18,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:23:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918624901] [2023-02-14 12:23:18,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918624901] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 12:23:18,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 12:23:18,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-02-14 12:23:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757224219] [2023-02-14 12:23:18,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:23:18,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 12:23:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 12:23:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 12:23:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=99, Unknown=2, NotChecked=20, Total=156 [2023-02-14 12:23:18,018 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 12:23:22,656 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (let ((.cse0 (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~a~0#1|))) (and (= ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode .cse0 .cse0)) (_ bv0 32)) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|) .cse0)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)))))) is different from false [2023-02-14 12:23:24,701 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (let ((.cse0 (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~a~0#1|))) (and (= ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode .cse0 .cse0)) (_ bv0 32)) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|) .cse0)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)))))) is different from true [2023-02-14 12:23:29,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:31,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:34,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:37,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:39,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:42,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:44,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-14 12:23:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:23:44,072 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-14 12:23:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 12:23:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-14 12:23:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:23:44,199 INFO L225 Difference]: With dead ends: 31 [2023-02-14 12:23:44,199 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 12:23:44,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=41, Invalid=119, Unknown=4, NotChecked=46, Total=210 [2023-02-14 12:23:44,200 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2023-02-14 12:23:44,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 7 Unknown, 31 Unchecked, 20.8s Time] [2023-02-14 12:23:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 12:23:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 12:23:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 12:23:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-02-14 12:23:44,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2023-02-14 12:23:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:23:44,206 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-02-14 12:23:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 12:23:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-02-14 12:23:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 12:23:44,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:23:44,207 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:23:44,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-14 12:23:44,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2023-02-14 12:23:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-02-14 12:23:44,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:23:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:23:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1035962748, now seen corresponding path program 1 times [2023-02-14 12:23:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 12:23:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691998182] [2023-02-14 12:23:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:23:44,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 12:23:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 12:23:44,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 12:23:44,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-14 12:23:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:23:49,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 12:23:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:23:50,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-14 12:23:50,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [207524790] [2023-02-14 12:23:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:23:50,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 12:23:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 12:23:50,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-14 12:23:50,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-02-14 12:24:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 12:24:19,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 12:25:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat