./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.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/sqrt1-ll_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:36:16,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:36:16,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:36:16,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:36:16,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:36:16,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:36:16,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:36:16,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:36:16,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:36:16,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:36:16,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:36:16,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:36:16,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:36:16,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:36:16,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:36:16,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:36:16,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:36:16,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:36:16,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:36:16,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:36:16,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:36:16,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:36:16,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:36:16,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:36:16,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:36:16,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:36:16,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:36:16,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:36:16,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:36:16,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:36:16,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:36:16,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:36:16,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:36:16,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:36:16,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:36:16,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:36:16,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:36:16,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:36:16,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:36:16,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:36:16,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:36:16,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:36:16,618 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:36:16,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:36:16,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:36:16,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:36:16,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:36:16,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:36:16,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:36:16,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:36:16,621 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:36:16,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:36:16,621 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:36:16,622 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:36:16,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:36:16,623 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:36:16,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:36:16,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:36:16,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:36:16,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:36:16,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:36:16,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:36:16,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:36:16,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:36:16,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:36:16,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:36:16,625 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:36:16,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:36:16,625 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:36:16,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:36:16,625 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:36:16,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 [2023-02-15 12:36:16,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:36:16,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:36:16,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:36:16,787 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:36:16,788 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:36:16,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2023-02-15 12:36:17,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:36:17,752 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:36:17,753 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2023-02-15 12:36:17,757 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873db9815/b25e4b50b96e4ff288166f5d0c66fb72/FLAG5a7bf4da5 [2023-02-15 12:36:17,769 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873db9815/b25e4b50b96e4ff288166f5d0c66fb72 [2023-02-15 12:36:17,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:36:17,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:36:17,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:36:17,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:36:17,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:36:17,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:17,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6912e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17, skipping insertion in model container [2023-02-15 12:36:17,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:17,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:36:17,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:36:17,913 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/sqrt1-ll_unwindbound50.c[520,533] [2023-02-15 12:36:17,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:36:17,937 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:36:17,945 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/sqrt1-ll_unwindbound50.c[520,533] [2023-02-15 12:36:17,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:36:17,957 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:36:17,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17 WrapperNode [2023-02-15 12:36:17,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:36:17,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:36:17,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:36:17,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:36:17,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:17,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:17,983 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-15 12:36:17,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:36:17,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:36:17,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:36:17,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:36:17,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:17,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,009 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:36:18,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:36:18,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:36:18,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:36:18,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (1/1) ... [2023-02-15 12:36:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:36:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:18,050 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 12:36:18,055 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 12:36:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:36:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:36:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:36:18,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:36:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 12:36:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 12:36:18,115 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:36:18,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:36:18,197 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:36:18,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:36:18,201 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 12:36:18,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:18 BoogieIcfgContainer [2023-02-15 12:36:18,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:36:18,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:36:18,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:36:18,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:36:18,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:36:17" (1/3) ... [2023-02-15 12:36:18,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ac8a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:36:18, skipping insertion in model container [2023-02-15 12:36:18,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:17" (2/3) ... [2023-02-15 12:36:18,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ac8a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:36:18, skipping insertion in model container [2023-02-15 12:36:18,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:18" (3/3) ... [2023-02-15 12:36:18,208 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2023-02-15 12:36:18,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:36:18,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:36:18,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:36:18,254 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;@725fece6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:36:18,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:36:18,257 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 12:36:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 12:36:18,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:18,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:18,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-15 12:36:18,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:18,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871906678] [2023-02-15 12:36:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:18,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:18,350 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 12:36:18,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871906678] [2023-02-15 12:36:18,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871906678] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:18,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:18,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:36:18,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909997144] [2023-02-15 12:36:18,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:18,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:36:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:36:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:36:18,381 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 12:36:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:18,402 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-15 12:36:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:36:18,403 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 12:36:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:18,408 INFO L225 Difference]: With dead ends: 40 [2023-02-15 12:36:18,408 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 12:36:18,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 12:36:18,412 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 12:36:18,412 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 12:36:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 12:36:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 12:36:18,449 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 12:36:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 12:36:18,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-15 12:36:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:18,451 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 12:36:18,451 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 12:36:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-15 12:36:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 12:36:18,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:18,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:36:18,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-15 12:36:18,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013830764] [2023-02-15 12:36:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:18,565 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 12:36:18,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013830764] [2023-02-15 12:36:18,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013830764] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:18,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:18,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:36:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604174535] [2023-02-15 12:36:18,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:36:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:18,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:36:18,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:36:18,568 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 12:36:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:18,581 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-15 12:36:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:36:18,582 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 12:36:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:18,582 INFO L225 Difference]: With dead ends: 28 [2023-02-15 12:36:18,582 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 12:36:18,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 12:36:18,583 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 12:36:18,584 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 12:36:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 12:36:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 12:36:18,587 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 12:36:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-15 12:36:18,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-15 12:36:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:18,589 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 12:36:18,589 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 12:36:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-15 12:36:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 12:36:18,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:18,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:18,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:36:18,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:18,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:18,591 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-15 12:36:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:18,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732082331] [2023-02-15 12:36:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:18,747 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 12:36:18,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732082331] [2023-02-15 12:36:18,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732082331] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:18,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:18,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:36:18,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126107555] [2023-02-15 12:36:18,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:36:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:36:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:36:18,750 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) 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 12:36:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:18,819 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-02-15 12:36:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:36:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) 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 12:36:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:18,820 INFO L225 Difference]: With dead ends: 32 [2023-02-15 12:36:18,821 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 12:36:18,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:36:18,822 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:18,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 12:36:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-02-15 12:36:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 12:36:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-15 12:36:18,835 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-02-15 12:36:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:18,836 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-15 12:36:18,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) 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 12:36:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-15 12:36:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 12:36:18,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:18,837 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:18,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 12:36:18,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-02-15 12:36:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:18,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232554734] [2023-02-15 12:36:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:18,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:36:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441403162] [2023-02-15 12:36:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:18,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:18,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:18,859 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 12:36:18,874 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 12:36:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 12:36:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:19,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:19,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232554734] [2023-02-15 12:36:19,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:36:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441403162] [2023-02-15 12:36:19,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441403162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:19,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:36:19,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 12:36:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626725692] [2023-02-15 12:36:19,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:19,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 12:36:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 12:36:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:36:19,202 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:36:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:19,319 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-02-15 12:36:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:36:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-02-15 12:36:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:19,322 INFO L225 Difference]: With dead ends: 40 [2023-02-15 12:36:19,322 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 12:36:19,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:36:19,329 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:19,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 12:36:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-02-15 12:36:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) 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), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 12:36:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-02-15 12:36:19,347 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2023-02-15 12:36:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:19,348 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-02-15 12:36:19,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:36:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-02-15 12:36:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 12:36:19,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:19,350 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:19,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 12:36:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:19,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:19,555 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2023-02-15 12:36:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:19,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124189497] [2023-02-15 12:36:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:19,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:19,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:36:19,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144055982] [2023-02-15 12:36:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:19,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:19,565 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 12:36:19,566 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 12:36:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:19,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 12:36:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:36:19,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:36:19,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124189497] [2023-02-15 12:36:19,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:36:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144055982] [2023-02-15 12:36:19,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144055982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:19,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:36:19,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 12:36:19,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365168856] [2023-02-15 12:36:19,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:19,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:36:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:36:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:36:19,714 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:36:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:19,811 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2023-02-15 12:36:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 12:36:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2023-02-15 12:36:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:19,814 INFO L225 Difference]: With dead ends: 88 [2023-02-15 12:36:19,814 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 12:36:19,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:36:19,815 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:19,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 150 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 12:36:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2023-02-15 12:36:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 12:36:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2023-02-15 12:36:19,829 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 26 [2023-02-15 12:36:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:19,829 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2023-02-15 12:36:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:36:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2023-02-15 12:36:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 12:36:19,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:19,830 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:19,837 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 12:36:20,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:20,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2023-02-15 12:36:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:20,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678043167] [2023-02-15 12:36:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:20,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:36:20,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301789954] [2023-02-15 12:36:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:20,043 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 12:36:20,045 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 12:36:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 12:36:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:36:20,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:36:20,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678043167] [2023-02-15 12:36:20,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:36:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301789954] [2023-02-15 12:36:20,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301789954] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:20,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:36:20,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-15 12:36:20,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621391538] [2023-02-15 12:36:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:20,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:36:20,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:36:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:36:20,169 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:36:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:20,206 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2023-02-15 12:36:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:36:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-02-15 12:36:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:20,208 INFO L225 Difference]: With dead ends: 85 [2023-02-15 12:36:20,208 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 12:36:20,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:36:20,209 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:20,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 12:36:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-02-15 12:36:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 12:36:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-02-15 12:36:20,230 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2023-02-15 12:36:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:20,230 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-02-15 12:36:20,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:36:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-02-15 12:36:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 12:36:20,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:20,232 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:20,248 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 12:36:20,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:20,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash 854826784, now seen corresponding path program 2 times [2023-02-15 12:36:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:20,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782173123] [2023-02-15 12:36:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:20,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:36:20,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184849425] [2023-02-15 12:36:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:36:20,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:20,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:36:20,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:36:20,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:36:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 12:36:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 12:36:20,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 12:36:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782173123] [2023-02-15 12:36:20,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:36:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184849425] [2023-02-15 12:36:20,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184849425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:20,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:36:20,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 12:36:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769033024] [2023-02-15 12:36:20,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:20,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 12:36:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 12:36:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:36:20,641 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 12:36:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:20,785 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2023-02-15 12:36:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:36:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2023-02-15 12:36:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:20,786 INFO L225 Difference]: With dead ends: 83 [2023-02-15 12:36:20,786 INFO L226 Difference]: Without dead ends: 0 [2023-02-15 12:36:20,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:36:20,787 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:20,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-15 12:36:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-15 12:36:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:36:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 12:36:20,788 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2023-02-15 12:36:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:20,788 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 12:36:20,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 12:36:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-15 12:36:20,789 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-15 12:36:20,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 12:36:20,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:20,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:20,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-15 12:36:21,477 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-02-15 12:36:21,477 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-15 12:36:21,477 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,477 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-02-15 12:36:21,478 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-15 12:36:21,478 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 21 49) the Hoare annotation is: true [2023-02-15 12:36:21,478 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-15 12:36:21,478 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,478 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,478 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-02-15 12:36:21,478 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-02-15 12:36:21,479 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-02-15 12:36:21,479 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-02-15 12:36:21,479 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-02-15 12:36:21,479 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-02-15 12:36:21,481 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-02-15 12:36:21,482 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 12:36:21,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 12:36:21 BoogieIcfgContainer [2023-02-15 12:36:21,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 12:36:21,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 12:36:21,491 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 12:36:21,491 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 12:36:21,492 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:18" (3/4) ... [2023-02-15 12:36:21,493 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-15 12:36:21,497 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-15 12:36:21,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-15 12:36:21,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-15 12:36:21,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-15 12:36:21,500 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-15 12:36:21,518 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 12:36:21,518 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 12:36:21,519 INFO L158 Benchmark]: Toolchain (without parser) took 3746.76ms. Allocated memory was 132.1MB in the beginning and 165.7MB in the end (delta: 33.6MB). Free memory was 96.6MB in the beginning and 112.0MB in the end (delta: -15.5MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2023-02-15 12:36:21,519 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:36:21,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.94ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 86.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 12:36:21,519 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.33ms. Allocated memory is still 132.1MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:36:21,520 INFO L158 Benchmark]: Boogie Preprocessor took 26.73ms. Allocated memory is still 132.1MB. Free memory was 84.4MB in the beginning and 83.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 12:36:21,520 INFO L158 Benchmark]: RCFGBuilder took 191.15ms. Allocated memory is still 132.1MB. Free memory was 83.0MB in the beginning and 73.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 12:36:21,520 INFO L158 Benchmark]: TraceAbstraction took 3286.74ms. Allocated memory was 132.1MB in the beginning and 165.7MB in the end (delta: 33.6MB). Free memory was 72.7MB in the beginning and 115.2MB in the end (delta: -42.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:36:21,520 INFO L158 Benchmark]: Witness Printer took 27.40ms. Allocated memory is still 165.7MB. Free memory was 115.2MB in the beginning and 112.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 12:36:21,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.94ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 86.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.33ms. Allocated memory is still 132.1MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.73ms. Allocated memory is still 132.1MB. Free memory was 84.4MB in the beginning and 83.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 191.15ms. Allocated memory is still 132.1MB. Free memory was 83.0MB in the beginning and 73.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3286.74ms. Allocated memory was 132.1MB in the beginning and 165.7MB in the end (delta: 33.6MB). Free memory was 72.7MB in the beginning and 115.2MB in the end (delta: -42.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 27.40ms. Allocated memory is still 165.7MB. Free memory was 115.2MB in the beginning and 112.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 106 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 467 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 312 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 465 IncrementalHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 155 mSDtfsCounter, 465 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 142 HoareAnnotationTreeSize, 44 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 882 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 840 SizeOfPredicates, 11 NumberOfNonLiveVariables, 340 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 156/196 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && s * 4 == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2023-02-15 12:36:21,547 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 Writing output log to file Ultimate.log Result: TRUE