./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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_unwindbound50.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 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:13:21,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:13:21,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:13:21,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:13:21,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:13:21,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:13:21,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:13:21,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:13:21,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:13:21,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:13:21,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:13:21,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:13:21,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:13:21,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:13:21,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:13:21,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:13:21,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:13:21,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:13:21,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:13:21,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:13:21,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:13:21,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:13:21,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:13:21,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:13:21,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:13:21,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:13:21,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:13:21,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:13:21,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:13:21,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:13:21,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:13:21,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:13:21,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:13:21,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:13:21,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:13:21,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:13:21,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:13:21,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:13:21,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:13:21,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:13:21,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:13:21,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:13:21,728 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:13:21,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:13:21,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:13:21,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:13:21,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:13:21,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:13:21,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:13:21,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:13:21,730 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:13:21,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:13:21,731 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:13:21,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:13:21,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:13:21,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:13:21,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:13:21,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:13:21,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:13:21,732 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:13:21,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:13:21,732 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:13:21,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:13:21,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:13:21,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:13:21,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:13:21,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:13:21,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:13:21,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:13:21,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:13:21,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:13:21,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:13:21,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:13:21,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:13:21,734 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:13:21,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:13:21,734 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:13:21,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac [2023-02-16 02:13:21,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:13:21,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:13:21,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:13:21,903 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:13:21,903 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:13:21,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-02-16 02:13:22,778 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:13:22,986 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:13:22,987 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-02-16 02:13:22,991 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34256fecc/bd1512330bfd4bed8ec1242fdd1c2d6c/FLAG142563547 [2023-02-16 02:13:23,002 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34256fecc/bd1512330bfd4bed8ec1242fdd1c2d6c [2023-02-16 02:13:23,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:13:23,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:13:23,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:13:23,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:13:23,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:13:23,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632ab2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23, skipping insertion in model container [2023-02-16 02:13:23,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:13:23,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:13:23,121 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_unwindbound50.c[709,722] [2023-02-16 02:13:23,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:13:23,141 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:13:23,151 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_unwindbound50.c[709,722] [2023-02-16 02:13:23,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:13:23,180 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:13:23,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23 WrapperNode [2023-02-16 02:13:23,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:13:23,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:13:23,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:13:23,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:13:23,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,209 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-02-16 02:13:23,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:13:23,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:13:23,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:13:23,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:13:23,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,231 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:13:23,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:13:23,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:13:23,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:13:23,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (1/1) ... [2023-02-16 02:13:23,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:13:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:13:23,262 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) [2023-02-16 02:13:23,279 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 [2023-02-16 02:13:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:13:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:13:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:13:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:13:23,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 02:13:23,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 02:13:23,331 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:13:23,332 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:13:23,410 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:13:23,414 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:13:23,414 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-16 02:13:23,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:13:23 BoogieIcfgContainer [2023-02-16 02:13:23,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:13:23,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:13:23,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:13:23,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:13:23,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:13:23" (1/3) ... [2023-02-16 02:13:23,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68be7592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:13:23, skipping insertion in model container [2023-02-16 02:13:23,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:23" (2/3) ... [2023-02-16 02:13:23,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68be7592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:13:23, skipping insertion in model container [2023-02-16 02:13:23,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:13:23" (3/3) ... [2023-02-16 02:13:23,420 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2023-02-16 02:13:23,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:13:23,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:13:23,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:13:23,462 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;@6befa80e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:13:23,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:13:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-02-16 02:13:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 02:13:23,469 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:23,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:23,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-16 02:13:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:13:23,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823800713] [2023-02-16 02:13:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:13:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:13:23,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:13:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823800713] [2023-02-16 02:13:23,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 02:13:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706346912] [2023-02-16 02:13:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:23,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:13:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:13:23,608 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) [2023-02-16 02:13:23,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:13:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:13:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 02:13:23,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:13:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:13:23,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:13:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706346912] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:13:23,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:13:23,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 02:13:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215542720] [2023-02-16 02:13:23,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:13:23,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 02:13:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:13:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 02:13:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:13:23,690 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-16 02:13:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:13:23,703 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-16 02:13:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 02:13:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2023-02-16 02:13:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:13:23,708 INFO L225 Difference]: With dead ends: 40 [2023-02-16 02:13:23,708 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 02:13:23,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:13:23,712 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 [2023-02-16 02:13:23,712 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] [2023-02-16 02:13:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 02:13:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 02:13:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 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) [2023-02-16 02:13:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-16 02:13:23,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-16 02:13:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:13:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-16 02:13:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-16 02:13:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-16 02:13:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 02:13:23,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:23,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:23,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:13:23,940 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 [2023-02-16 02:13:23,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-16 02:13:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:13:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032605685] [2023-02-16 02:13:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:23,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:13:23,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:13:23,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394616302] [2023-02-16 02:13:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:23,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:13:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:13:23,964 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) [2023-02-16 02:13:23,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:13:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:13:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 02:13:24,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:13:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:13:24,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:13:24,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:13:24,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032605685] [2023-02-16 02:13:24,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:13:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394616302] [2023-02-16 02:13:24,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394616302] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:13:24,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:13:24,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 02:13:24,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517815844] [2023-02-16 02:13:24,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:13:24,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 02:13:24,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:13:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 02:13:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:13:24,064 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-16 02:13:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:13:24,082 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-16 02:13:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:13:24,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-02-16 02:13:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:13:24,086 INFO L225 Difference]: With dead ends: 28 [2023-02-16 02:13:24,086 INFO L226 Difference]: Without dead ends: 19 [2023-02-16 02:13:24,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:13:24,088 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:13:24,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:13:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-16 02:13:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-16 02:13:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-02-16 02:13:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-16 02:13:24,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-16 02:13:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:13:24,097 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-16 02:13:24,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-16 02:13:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-16 02:13:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 02:13:24,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:24,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:24,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:13:24,303 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 [2023-02-16 02:13:24,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-16 02:13:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:13:24,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611319333] [2023-02-16 02:13:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:13:24,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:13:24,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402465206] [2023-02-16 02:13:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:24,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:13:24,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:13:24,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:13:24,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:13:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:24,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 02:13:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:24,383 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 02:13:24,384 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-16 02:13:24,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-16 02:13:24,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 02:13:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:13:24,592 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-02-16 02:13:24,594 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-16 02:13:24,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:13:24 BoogieIcfgContainer [2023-02-16 02:13:24,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-16 02:13:24,608 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 02:13:24,608 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 02:13:24,609 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 02:13:24,609 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:13:23" (3/4) ... [2023-02-16 02:13:24,610 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-16 02:13:24,611 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 02:13:24,613 INFO L158 Benchmark]: Toolchain (without parser) took 1606.24ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 90.8MB in the beginning and 97.6MB in the end (delta: -6.8MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2023-02-16 02:13:24,615 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:13:24,616 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.36ms. Allocated memory is still 127.9MB. Free memory was 90.8MB in the beginning and 80.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 02:13:24,616 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.67ms. Allocated memory is still 127.9MB. Free memory was 80.2MB in the beginning and 78.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:13:24,616 INFO L158 Benchmark]: Boogie Preprocessor took 25.15ms. Allocated memory is still 127.9MB. Free memory was 78.6MB in the beginning and 77.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:13:24,616 INFO L158 Benchmark]: RCFGBuilder took 179.13ms. Allocated memory is still 127.9MB. Free memory was 77.3MB in the beginning and 66.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 02:13:24,617 INFO L158 Benchmark]: TraceAbstraction took 1191.27ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 66.4MB in the beginning and 98.6MB in the end (delta: -32.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:13:24,617 INFO L158 Benchmark]: Witness Printer took 2.71ms. Allocated memory is still 155.2MB. Free memory was 98.6MB in the beginning and 97.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:13:24,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.36ms. Allocated memory is still 127.9MB. Free memory was 90.8MB in the beginning and 80.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.67ms. Allocated memory is still 127.9MB. Free memory was 80.2MB in the beginning and 78.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.15ms. Allocated memory is still 127.9MB. Free memory was 78.6MB in the beginning and 77.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 179.13ms. Allocated memory is still 127.9MB. Free memory was 77.3MB in the beginning and 66.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1191.27ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 66.4MB in the beginning and 98.6MB in the end (delta: -32.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.71ms. Allocated memory is still 155.2MB. Free memory was 98.6MB in the beginning and 97.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<50 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, 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, 86 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 48 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 90 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 [2023-02-16 02:13:24,634 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_unwindbound50.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 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:13:26,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:13:26,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:13:26,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:13:26,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:13:26,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:13:26,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:13:26,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:13:26,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:13:26,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:13:26,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:13:26,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:13:26,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:13:26,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:13:26,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:13:26,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:13:26,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:13:26,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:13:26,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:13:26,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:13:26,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:13:26,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:13:26,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:13:26,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:13:26,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:13:26,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:13:26,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:13:26,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:13:26,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:13:26,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:13:26,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:13:26,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:13:26,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:13:26,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:13:26,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:13:26,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:13:26,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:13:26,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:13:26,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:13:26,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:13:26,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:13:26,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-16 02:13:26,680 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:13:26,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:13:26,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:13:26,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:13:26,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:13:26,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:13:26,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:13:26,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:13:26,683 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:13:26,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:13:26,684 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:13:26,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:13:26,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:13:26,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:13:26,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:13:26,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:13:26,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 02:13:26,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-16 02:13:26,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-16 02:13:26,685 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:13:26,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:13:26,686 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:13:26,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:13:26,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:13:26,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:13:26,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:13:26,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:13:26,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:13:26,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:13:26,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:13:26,687 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-16 02:13:26,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-16 02:13:26,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:13:26,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:13:26,688 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:13:26,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:13:26,688 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-16 02:13:26,688 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:13:26,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac [2023-02-16 02:13:26,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:13:26,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:13:26,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:13:26,952 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:13:26,953 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:13:26,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-02-16 02:13:28,021 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:13:28,201 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:13:28,202 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-02-16 02:13:28,206 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc3b0e6a/3fb24d99ee2143609f12ae2356701113/FLAG9892736c3 [2023-02-16 02:13:28,219 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc3b0e6a/3fb24d99ee2143609f12ae2356701113 [2023-02-16 02:13:28,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:13:28,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:13:28,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:13:28,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:13:28,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:13:28,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e88ff5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28, skipping insertion in model container [2023-02-16 02:13:28,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:13:28,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:13:28,332 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_unwindbound50.c[709,722] [2023-02-16 02:13:28,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:13:28,351 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:13:28,358 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_unwindbound50.c[709,722] [2023-02-16 02:13:28,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:13:28,372 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:13:28,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28 WrapperNode [2023-02-16 02:13:28,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:13:28,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:13:28,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:13:28,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:13:28,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,399 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-16 02:13:28,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:13:28,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:13:28,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:13:28,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:13:28,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:13:28,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:13:28,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:13:28,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:13:28,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (1/1) ... [2023-02-16 02:13:28,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:13:28,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:13:28,481 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) [2023-02-16 02:13:28,499 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 [2023-02-16 02:13:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:13:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-16 02:13:28,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:13:28,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:13:28,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 02:13:28,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 02:13:28,566 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:13:28,567 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:13:29,916 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:13:29,919 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:13:29,919 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-16 02:13:29,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:13:29 BoogieIcfgContainer [2023-02-16 02:13:29,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:13:29,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:13:29,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:13:29,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:13:29,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:13:28" (1/3) ... [2023-02-16 02:13:29,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39134bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:13:29, skipping insertion in model container [2023-02-16 02:13:29,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:13:28" (2/3) ... [2023-02-16 02:13:29,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39134bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:13:29, skipping insertion in model container [2023-02-16 02:13:29,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:13:29" (3/3) ... [2023-02-16 02:13:29,942 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2023-02-16 02:13:29,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:13:29,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:13:29,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:13:29,993 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;@704d5ee4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:13:29,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:13:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-02-16 02:13:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 02:13:30,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:30,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:30,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-16 02:13:30,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-16 02:13:30,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041248324] [2023-02-16 02:13:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:30,022 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 [2023-02-16 02:13:30,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-16 02:13:30,025 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) [2023-02-16 02:13:30,026 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 [2023-02-16 02:13:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:13:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 02:13:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:13:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:13:30,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:13:30,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-16 02:13:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041248324] [2023-02-16 02:13:30,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041248324] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:13:30,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:13:30,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 02:13:30,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886366443] [2023-02-16 02:13:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:13:30,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 02:13:30,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-16 02:13:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 02:13:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:13:30,204 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-16 02:13:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:13:30,239 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-16 02:13:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 02:13:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2023-02-16 02:13:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:13:30,247 INFO L225 Difference]: With dead ends: 40 [2023-02-16 02:13:30,247 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 02:13:30,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:13:30,251 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 [2023-02-16 02:13:30,252 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] [2023-02-16 02:13:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 02:13:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 02:13:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 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) [2023-02-16 02:13:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-16 02:13:30,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-16 02:13:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:13:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-16 02:13:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-16 02:13:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-16 02:13:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 02:13:30,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:30,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:30,282 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 (2)] Ended with exit code 0 [2023-02-16 02:13:30,483 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 [2023-02-16 02:13:30,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-16 02:13:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-16 02:13:30,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348273181] [2023-02-16 02:13:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:30,489 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 [2023-02-16 02:13:30,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-16 02:13:30,490 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) [2023-02-16 02:13:30,491 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 [2023-02-16 02:13:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:13:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 02:13:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:13:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:13:30,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:13:30,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-16 02:13:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348273181] [2023-02-16 02:13:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348273181] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:13:30,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:13:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 02:13:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753254178] [2023-02-16 02:13:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:13:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 02:13:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-16 02:13:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 02:13:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:13:30,634 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-16 02:13:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:13:30,651 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-16 02:13:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:13:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-02-16 02:13:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:13:30,652 INFO L225 Difference]: With dead ends: 28 [2023-02-16 02:13:30,652 INFO L226 Difference]: Without dead ends: 19 [2023-02-16 02:13:30,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:13:30,653 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:13:30,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:13:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-16 02:13:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-16 02:13:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-02-16 02:13:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-16 02:13:30,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-16 02:13:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:13:30,658 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-16 02:13:30,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-16 02:13:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-16 02:13:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 02:13:30,658 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:30,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:30,668 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 [2023-02-16 02:13:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 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 [2023-02-16 02:13:30,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-16 02:13:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-16 02:13:30,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793451952] [2023-02-16 02:13:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:30,869 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 [2023-02-16 02:13:30,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-16 02:13:30,870 INFO L229 MonitoredProcess]: Starting monitored process 4 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) [2023-02-16 02:13:30,872 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 (4)] Waiting until timeout for monitored process [2023-02-16 02:13:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:30,983 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 02:13:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:31,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-16 02:13:31,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [51372709] [2023-02-16 02:13:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:31,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-16 02:13:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-16 02:13:31,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-16 02:13:31,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-02-16 02:13:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:13:31,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 02:13:31,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:13:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:13:31,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:13:31,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-16 02:13:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793451952] [2023-02-16 02:13:31,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:13:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [51372709] [2023-02-16 02:13:31,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [51372709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:13:31,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:13:31,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:13:31,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951512470] [2023-02-16 02:13:31,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:13:31,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 02:13:31,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-16 02:13:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 02:13:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:13:31,270 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-16 02:13:33,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-16 02:13:35,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-16 02:13:38,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-16 02:13:39,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-16 02:13:42,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-16 02:13:44,734 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 [] [2023-02-16 02:13:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:13:44,746 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-02-16 02:13:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:13:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2023-02-16 02:13:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:13:44,845 INFO L225 Difference]: With dead ends: 33 [2023-02-16 02:13:44,845 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 02:13:44,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:13:44,846 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:13:44,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 4 Unknown, 0 Unchecked, 13.4s Time] [2023-02-16 02:13:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 02:13:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-16 02:13:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 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) [2023-02-16 02:13:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-16 02:13:44,855 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2023-02-16 02:13:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:13:44,855 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-16 02:13:44,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-16 02:13:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-16 02:13:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 02:13:44,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:13:44,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:13:44,870 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 (4)] Forceful destruction successful, exit code 0 [2023-02-16 02:13:45,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2023-02-16 02:13:45,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-02-16 02:13:45,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:13:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:13:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-02-16 02:13:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-16 02:13:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701659319] [2023-02-16 02:13:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:45,261 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 [2023-02-16 02:13:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-16 02:13:45,264 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2023-02-16 02:13:45,265 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 (6)] Waiting until timeout for monitored process [2023-02-16 02:13:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:45,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 02:13:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:45,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-16 02:13:45,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [332901485] [2023-02-16 02:13:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:13:45,728 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-16 02:13:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-16 02:13:45,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-16 02:13:45,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-02-16 02:13:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:13:46,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 02:13:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat