./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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_unwindbound20.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 c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:52:09,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:52:09,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:52:09,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:52:09,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:52:09,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:52:09,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:52:09,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:52:09,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:52:09,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:52:09,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:52:09,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:52:09,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:52:09,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:52:09,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:52:09,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:52:09,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:52:10,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:52:10,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:52:10,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:52:10,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:52:10,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:52:10,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:52:10,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:52:10,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:52:10,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:52:10,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:52:10,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:52:10,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:52:10,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:52:10,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:52:10,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:52:10,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:52:10,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:52:10,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:52:10,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:52:10,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:52:10,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:52:10,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:52:10,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:52:10,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:52:10,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:52:10,042 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:52:10,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:52:10,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:52:10,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:52:10,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:52:10,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:52:10,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:52:10,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:52:10,044 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:52:10,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:52:10,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:52:10,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:52:10,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:52:10,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:52:10,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:52:10,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:52:10,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:52:10,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:52:10,048 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:52:10,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:52:10,048 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:52:10,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:52:10,048 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:52:10,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 [2023-02-15 11:52:10,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:52:10,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:52:10,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:52:10,204 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:52:10,204 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:52:10,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-15 11:52:11,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:52:11,266 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:52:11,266 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-15 11:52:11,271 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e5b6e03/2637de0b56df4dcea4489e15d577923a/FLAG217bb4805 [2023-02-15 11:52:11,285 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e5b6e03/2637de0b56df4dcea4489e15d577923a [2023-02-15 11:52:11,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:52:11,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:52:11,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:52:11,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:52:11,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:52:11,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e23d554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11, skipping insertion in model container [2023-02-15 11:52:11,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:52:11,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:52:11,404 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_unwindbound20.c[709,722] [2023-02-15 11:52:11,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:52:11,440 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:52:11,448 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_unwindbound20.c[709,722] [2023-02-15 11:52:11,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:52:11,469 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:52:11,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11 WrapperNode [2023-02-15 11:52:11,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:52:11,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:52:11,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:52:11,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:52:11,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,487 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-02-15 11:52:11,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:52:11,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:52:11,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:52:11,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:52:11,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,500 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:52:11,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:52:11,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:52:11,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:52:11,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (1/1) ... [2023-02-15 11:52:11,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:52:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:52:11,523 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) [2023-02-15 11:52:11,528 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 [2023-02-15 11:52:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:52:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:52:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:52:11,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:52:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:52:11,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:52:11,598 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:52:11,599 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:52:11,751 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:52:11,754 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:52:11,759 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:52:11,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:52:11 BoogieIcfgContainer [2023-02-15 11:52:11,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:52:11,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:52:11,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:52:11,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:52:11,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:52:11" (1/3) ... [2023-02-15 11:52:11,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1dbe98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:52:11, skipping insertion in model container [2023-02-15 11:52:11,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:11" (2/3) ... [2023-02-15 11:52:11,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1dbe98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:52:11, skipping insertion in model container [2023-02-15 11:52:11,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:52:11" (3/3) ... [2023-02-15 11:52:11,791 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2023-02-15 11:52:11,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:52:11,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:52:11,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:52:11,869 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;@2096b3a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:52:11,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:52:11,872 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) [2023-02-15 11:52:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:52:11,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:11,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:11,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:11,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-15 11:52:11,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:52:11,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706493153] [2023-02-15 11:52:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:52:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:52:11,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:52:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706493153] [2023-02-15 11:52:11,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:52:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457985091] [2023-02-15 11:52:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:52:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:52:11,965 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) [2023-02-15 11:52:11,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:52:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:52:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:52:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:52:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:52:12,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:52:12,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457985091] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:52:12,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:52:12,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:52:12,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037238334] [2023-02-15 11:52:12,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:52:12,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:52:12,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:52:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:52:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:52:12,040 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) [2023-02-15 11:52:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:52:12,061 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-15 11:52:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:52:12,062 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 [2023-02-15 11:52:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:52:12,066 INFO L225 Difference]: With dead ends: 40 [2023-02-15 11:52:12,066 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 11:52:12,068 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 [2023-02-15 11:52:12,070 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 [2023-02-15 11:52:12,070 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] [2023-02-15 11:52:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 11:52:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 11:52:12,089 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) [2023-02-15 11:52:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 11:52:12,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-15 11:52:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:52:12,099 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 11:52:12,099 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) [2023-02-15 11:52:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-15 11:52:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:52:12,100 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:12,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:12,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:52:12,306 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 [2023-02-15 11:52:12,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-15 11:52:12,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:52:12,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871181128] [2023-02-15 11:52:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:52:12,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:52:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896744807] [2023-02-15 11:52:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:12,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:52:12,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:52:12,339 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) [2023-02-15 11:52:12,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:52:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:52:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:52:12,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:52:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:52:12,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:52:12,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:52:12,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871181128] [2023-02-15 11:52:12,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:52:12,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896744807] [2023-02-15 11:52:12,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896744807] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:52:12,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:52:12,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:52:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816952661] [2023-02-15 11:52:12,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:52:12,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:52:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:52:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:52:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:52:12,399 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) [2023-02-15 11:52:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:52:12,415 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-15 11:52:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:52:12,416 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 [2023-02-15 11:52:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:52:12,417 INFO L225 Difference]: With dead ends: 28 [2023-02-15 11:52:12,417 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 11:52:12,417 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 [2023-02-15 11:52:12,419 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 [2023-02-15 11:52:12,419 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] [2023-02-15 11:52:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 11:52:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 11:52:12,425 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) [2023-02-15 11:52:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-15 11:52:12,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-15 11:52:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:52:12,427 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 11:52:12,428 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) [2023-02-15 11:52:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-15 11:52:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:52:12,428 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:12,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:12,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:52:12,633 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 [2023-02-15 11:52:12,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-15 11:52:12,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:52:12,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266581746] [2023-02-15 11:52:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:12,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:52:12,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:52:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351777920] [2023-02-15 11:52:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:52:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:52:12,642 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) [2023-02-15 11:52:12,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:52:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:12,670 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:52:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:12,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 11:52:12,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 11:52:12,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 11:52:12,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:52:12,896 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 [2023-02-15 11:52:12,899 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-02-15 11:52:12,901 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 11:52:12,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 11:52:12 BoogieIcfgContainer [2023-02-15 11:52:12,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 11:52:12,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 11:52:12,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 11:52:12,914 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 11:52:12,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:52:11" (3/4) ... [2023-02-15 11:52:12,916 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 11:52:12,916 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 11:52:12,916 INFO L158 Benchmark]: Toolchain (without parser) took 1628.32ms. Allocated memory is still 151.0MB. Free memory was 115.3MB in the beginning and 108.6MB in the end (delta: 6.7MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2023-02-15 11:52:12,916 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:52:12,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.44ms. Allocated memory is still 151.0MB. Free memory was 115.3MB in the beginning and 104.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 11:52:12,919 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.11ms. Allocated memory is still 151.0MB. Free memory was 104.8MB in the beginning and 103.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:52:12,919 INFO L158 Benchmark]: Boogie Preprocessor took 13.30ms. Allocated memory is still 151.0MB. Free memory was 103.3MB in the beginning and 101.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:52:12,920 INFO L158 Benchmark]: RCFGBuilder took 259.45ms. Allocated memory is still 151.0MB. Free memory was 101.6MB in the beginning and 91.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 11:52:12,924 INFO L158 Benchmark]: TraceAbstraction took 1150.75ms. Allocated memory is still 151.0MB. Free memory was 90.7MB in the beginning and 109.1MB in the end (delta: -18.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:52:12,925 INFO L158 Benchmark]: Witness Printer took 2.09ms. Allocated memory is still 151.0MB. Free memory was 109.1MB in the beginning and 108.6MB in the end (delta: 491.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:52:12,926 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 109.1MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.44ms. Allocated memory is still 151.0MB. Free memory was 115.3MB in the beginning and 104.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.11ms. Allocated memory is still 151.0MB. Free memory was 104.8MB in the beginning and 103.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.30ms. Allocated memory is still 151.0MB. Free memory was 103.3MB in the beginning and 101.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 259.45ms. Allocated memory is still 151.0MB. Free memory was 101.6MB in the beginning and 91.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1150.75ms. Allocated memory is still 151.0MB. Free memory was 90.7MB in the beginning and 109.1MB in the end (delta: -18.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.09ms. Allocated memory is still 151.0MB. Free memory was 109.1MB in the beginning and 108.6MB in the end (delta: 491.6kB). 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++<20 [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 [2023-02-15 11:52:12,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.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 c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:52:14,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:52:14,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:52:14,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:52:14,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:52:14,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:52:14,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:52:14,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:52:14,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:52:14,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:52:14,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:52:14,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:52:14,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:52:14,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:52:14,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:52:14,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:52:14,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:52:14,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:52:14,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:52:14,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:52:14,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:52:14,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:52:14,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:52:14,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:52:14,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:52:14,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:52:14,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:52:14,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:52:14,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:52:14,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:52:14,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:52:14,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:52:14,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:52:14,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:52:14,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:52:14,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:52:14,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:52:14,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:52:14,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:52:14,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:52:14,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:52:14,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-15 11:52:14,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:52:14,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:52:14,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:52:14,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:52:14,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:52:14,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:52:14,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:52:14,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:52:14,735 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:52:14,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:52:14,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:52:14,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:52:14,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:52:14,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:52:14,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:52:14,737 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:52:14,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:52:14,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:52:14,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:52:14,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:52:14,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:52:14,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:52:14,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:52:14,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:52:14,739 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 11:52:14,739 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 11:52:14,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:52:14,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:52:14,739 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:52:14,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:52:14,740 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 11:52:14,740 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:52:14,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 [2023-02-15 11:52:14,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:52:14,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:52:14,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:52:14,973 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:52:14,974 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:52:14,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-15 11:52:15,878 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:52:16,028 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:52:16,028 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-15 11:52:16,033 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ade51e6/0d2d442f36ef4964bc50417ab7b3aa7b/FLAG88a23c772 [2023-02-15 11:52:16,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ade51e6/0d2d442f36ef4964bc50417ab7b3aa7b [2023-02-15 11:52:16,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:52:16,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:52:16,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:52:16,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:52:16,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:52:16,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d40d91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16, skipping insertion in model container [2023-02-15 11:52:16,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:52:16,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:52:16,187 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_unwindbound20.c[709,722] [2023-02-15 11:52:16,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:52:16,228 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:52:16,237 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_unwindbound20.c[709,722] [2023-02-15 11:52:16,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:52:16,268 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:52:16,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16 WrapperNode [2023-02-15 11:52:16,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:52:16,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:52:16,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:52:16,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:52:16,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,308 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-15 11:52:16,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:52:16,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:52:16,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:52:16,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:52:16,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:52:16,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:52:16,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:52:16,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:52:16,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (1/1) ... [2023-02-15 11:52:16,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:52:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:52:16,370 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) [2023-02-15 11:52:16,383 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 [2023-02-15 11:52:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:52:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 11:52:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:52:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:52:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:52:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:52:16,440 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:52:16,441 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:52:17,542 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:52:17,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:52:17,546 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:52:17,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:52:17 BoogieIcfgContainer [2023-02-15 11:52:17,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:52:17,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:52:17,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:52:17,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:52:17,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:52:16" (1/3) ... [2023-02-15 11:52:17,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cb280e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:52:17, skipping insertion in model container [2023-02-15 11:52:17,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:52:16" (2/3) ... [2023-02-15 11:52:17,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cb280e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:52:17, skipping insertion in model container [2023-02-15 11:52:17,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:52:17" (3/3) ... [2023-02-15 11:52:17,552 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2023-02-15 11:52:17,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:52:17,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:52:17,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:52:17,591 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;@20049346, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:52:17,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:52:17,593 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) [2023-02-15 11:52:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:52:17,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:17,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:17,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-15 11:52:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:52:17,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851638871] [2023-02-15 11:52:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:17,614 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 [2023-02-15 11:52:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:52:17,616 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) [2023-02-15 11:52:17,617 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 [2023-02-15 11:52:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:52:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:52:17,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:52:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:52:17,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:52:17,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:52:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851638871] [2023-02-15 11:52:17,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851638871] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:52:17,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:52:17,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:52:17,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444754511] [2023-02-15 11:52:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:52:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:52:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:52:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:52:17,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:52:17,776 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) [2023-02-15 11:52:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:52:17,788 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-15 11:52:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:52:17,789 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 [2023-02-15 11:52:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:52:17,793 INFO L225 Difference]: With dead ends: 40 [2023-02-15 11:52:17,793 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 11:52:17,795 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 [2023-02-15 11:52:17,797 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 [2023-02-15 11:52:17,798 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] [2023-02-15 11:52:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 11:52:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 11:52:17,844 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) [2023-02-15 11:52:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 11:52:17,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-15 11:52:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:52:17,847 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 11:52:17,848 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) [2023-02-15 11:52:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-15 11:52:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:52:17,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:17,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:17,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:52:18,061 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 [2023-02-15 11:52:18,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-15 11:52:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:52:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900043395] [2023-02-15 11:52:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:18,064 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 [2023-02-15 11:52:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:52:18,066 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) [2023-02-15 11:52:18,068 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 [2023-02-15 11:52:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:52:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:52:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:52:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:52:18,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:52:18,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:52:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900043395] [2023-02-15 11:52:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900043395] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:52:18,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:52:18,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:52:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915600537] [2023-02-15 11:52:18,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:52:18,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:52:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:52:18,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:52:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:52:18,208 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) [2023-02-15 11:52:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:52:18,247 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-15 11:52:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:52:18,248 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 [2023-02-15 11:52:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:52:18,248 INFO L225 Difference]: With dead ends: 28 [2023-02-15 11:52:18,248 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 11:52:18,249 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 [2023-02-15 11:52:18,250 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 [2023-02-15 11:52:18,250 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] [2023-02-15 11:52:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 11:52:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 11:52:18,253 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) [2023-02-15 11:52:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-15 11:52:18,254 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-15 11:52:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:52:18,255 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 11:52:18,255 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) [2023-02-15 11:52:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-15 11:52:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:52:18,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:18,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:18,265 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 (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:52:18,465 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 [2023-02-15 11:52:18,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:18,466 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-15 11:52:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:52:18,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326328976] [2023-02-15 11:52:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:18,466 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 [2023-02-15 11:52:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:52:18,467 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) [2023-02-15 11:52:18,469 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 [2023-02-15 11:52:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:18,541 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:52:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:18,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-15 11:52:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1264060156] [2023-02-15 11:52:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 11:52:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 11:52:18,642 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) [2023-02-15 11:52:18,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-02-15 11:52:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:52:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:52:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:52:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:52:18,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:52:18,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:52:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326328976] [2023-02-15 11:52:18,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:52:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264060156] [2023-02-15 11:52:18,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264060156] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:52:18,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:52:18,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:52:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247761194] [2023-02-15 11:52:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:52:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:52:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:52:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:52:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:52:18,865 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) [2023-02-15 11:52:21,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:22,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:25,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:27,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:29,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:32,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:34,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:37,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:40,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:52:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:52:40,115 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-02-15 11:52:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:52:40,213 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 [2023-02-15 11:52:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:52:40,215 INFO L225 Difference]: With dead ends: 34 [2023-02-15 11:52:40,215 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 11:52:40,215 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 [2023-02-15 11:52:40,216 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:52:40,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 21.2s Time] [2023-02-15 11:52:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 11:52:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-15 11:52:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 11:52:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-02-15 11:52:40,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 8 [2023-02-15 11:52:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:52:40,223 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-02-15 11:52:40,223 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) [2023-02-15 11:52:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-02-15 11:52:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 11:52:40,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:52:40,224 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:52:40,234 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 (4)] Ended with exit code 0 [2023-02-15 11:52:40,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:52:40,627 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 [2023-02-15 11:52:40,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:52:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:52:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-02-15 11:52:40,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:52:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64405645] [2023-02-15 11:52:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:40,628 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 [2023-02-15 11:52:40,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:52:40,629 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) [2023-02-15 11:52:40,631 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 [2023-02-15 11:52:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:40,856 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:52:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:41,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-15 11:52:41,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1010866697] [2023-02-15 11:52:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:52:41,057 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 11:52:41,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 11:52:41,058 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) [2023-02-15 11:52:41,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-02-15 11:52:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:52:41,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:52:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat