./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/fermat2-ll_valuebound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73916c7f3287d52e9f1b60672ac0b7eb47f7096b 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 12:58:20,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 12:58:20,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 12:58:20,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 12:58:20,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 12:58:20,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 12:58:20,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 12:58:20,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 12:58:20,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 12:58:20,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 12:58:20,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 12:58:20,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 12:58:20,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 12:58:20,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 12:58:20,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 12:58:20,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 12:58:20,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 12:58:20,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 12:58:20,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 12:58:20,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 12:58:20,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 12:58:20,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 12:58:20,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 12:58:20,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 12:58:20,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 12:58:20,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 12:58:20,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 12:58:20,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 12:58:20,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 12:58:20,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 12:58:20,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 12:58:20,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 12:58:20,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 12:58:20,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 12:58:20,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 12:58:20,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 12:58:20,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 12:58:20,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 12:58:20,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 12:58:20,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 12:58:20,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 12:58:20,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 12:58:20,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 12:58:20,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 12:58:20,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 12:58:20,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 12:58:20,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 12:58:20,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 12:58:20,742 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 12:58:20,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 12:58:20,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 12:58:20,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 12:58:20,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 12:58:20,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 12:58:20,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 12:58:20,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 12:58:20,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 12:58:20,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 12:58:20,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:58:20,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 12:58:20,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73916c7f3287d52e9f1b60672ac0b7eb47f7096b [2021-08-29 12:58:21,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 12:58:21,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 12:58:21,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 12:58:21,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 12:58:21,028 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 12:58:21,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_valuebound5.c [2021-08-29 12:58:21,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb1ef4b4a/93a002f2cbbb40a29226c7d4f44f99a7/FLAG2eaeca2ed [2021-08-29 12:58:21,482 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 12:58:21,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_valuebound5.c [2021-08-29 12:58:21,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb1ef4b4a/93a002f2cbbb40a29226c7d4f44f99a7/FLAG2eaeca2ed [2021-08-29 12:58:21,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb1ef4b4a/93a002f2cbbb40a29226c7d4f44f99a7 [2021-08-29 12:58:21,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 12:58:21,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 12:58:21,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 12:58:21,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 12:58:21,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 12:58:21,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@149b7c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21, skipping insertion in model container [2021-08-29 12:58:21,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 12:58:21,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 12:58:21,627 WARN L228 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/fermat2-ll_valuebound5.c[524,537] [2021-08-29 12:58:21,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:58:21,642 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 12:58:21,652 WARN L228 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/fermat2-ll_valuebound5.c[524,537] [2021-08-29 12:58:21,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:58:21,715 INFO L208 MainTranslator]: Completed translation [2021-08-29 12:58:21,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21 WrapperNode [2021-08-29 12:58:21,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 12:58:21,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 12:58:21,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 12:58:21,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 12:58:21,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 12:58:21,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 12:58:21,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 12:58:21,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 12:58:21,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 12:58:21,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 12:58:21,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 12:58:21,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 12:58:21,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (1/1) ... [2021-08-29 12:58:21,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:58:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:58:21,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 12:58:21,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 12:58:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 12:58:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 12:58:21,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 12:58:21,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 12:58:21,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 12:58:21,968 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-29 12:58:21,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:58:21 BoogieIcfgContainer [2021-08-29 12:58:21,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 12:58:21,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 12:58:21,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 12:58:21,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 12:58:21,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 12:58:21" (1/3) ... [2021-08-29 12:58:21,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bccf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:58:21, skipping insertion in model container [2021-08-29 12:58:21,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:58:21" (2/3) ... [2021-08-29 12:58:21,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bccf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:58:21, skipping insertion in model container [2021-08-29 12:58:21,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:58:21" (3/3) ... [2021-08-29 12:58:21,976 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound5.c [2021-08-29 12:58:21,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 12:58:21,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 12:58:22,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 12:58:22,028 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 12:58:22,029 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 12:58:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 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) [2021-08-29 12:58:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 12:58:22,048 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:58:22,048 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:58:22,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:58:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:58:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2021-08-29 12:58:22,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:58:22,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462454141] [2021-08-29 12:58:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:58:22,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:58:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:58:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:58:22,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:58:22,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462454141] [2021-08-29 12:58:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462454141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:58:22,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:58:22,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 12:58:22,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450667309] [2021-08-29 12:58:22,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 12:58:22,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:58:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 12:58:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:58:22,232 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-08-29 12:58:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:58:22,328 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-08-29 12:58:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 12:58:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) Word has length 13 [2021-08-29 12:58:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:58:22,334 INFO L225 Difference]: With dead ends: 45 [2021-08-29 12:58:22,334 INFO L226 Difference]: Without dead ends: 20 [2021-08-29 12:58:22,336 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:58:22,339 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.16ms IncrementalHoareTripleChecker+Time [2021-08-29 12:58:22,339 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.29ms Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 71.16ms Time] [2021-08-29 12:58:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-29 12:58:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-29 12:58:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-08-29 12:58:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-29 12:58:22,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-08-29 12:58:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:58:22,392 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-29 12:58:22,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-08-29 12:58:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-29 12:58:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 12:58:22,393 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:58:22,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:58:22,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 12:58:22,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:58:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:58:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2021-08-29 12:58:22,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:58:22,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485568122] [2021-08-29 12:58:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:58:22,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:58:22,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:58:22,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127225796] [2021-08-29 12:58:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:58:22,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:58:22,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:58:22,444 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) [2021-08-29 12:58:22,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 12:58:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:58:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 12:58:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:58:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:58:22,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:58:22,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:58:22,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485568122] [2021-08-29 12:58:22,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:58:22,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127225796] [2021-08-29 12:58:22,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127225796] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:58:22,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:58:22,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:58:22,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45555067] [2021-08-29 12:58:22,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:58:22,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:58:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:58:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:58:22,680 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-08-29 12:58:31,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 8.95s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:58:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:58:31,689 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-08-29 12:58:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:58:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) Word has length 13 [2021-08-29 12:58:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:58:31,689 INFO L225 Difference]: With dead ends: 28 [2021-08-29 12:58:31,690 INFO L226 Difference]: Without dead ends: 26 [2021-08-29 12:58:31,690 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.19ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:58:31,691 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8990.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9000.19ms IncrementalHoareTripleChecker+Time [2021-08-29 12:58:31,691 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 9000.19ms Time] [2021-08-29 12:58:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-29 12:58:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-08-29 12:58:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-08-29 12:58:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-29 12:58:31,695 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 13 [2021-08-29 12:58:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:58:31,695 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-29 12:58:31,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-08-29 12:58:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-29 12:58:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 12:58:31,695 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:58:31,695 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:58:31,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 12:58:31,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:58:31,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:58:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:58:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2131930913, now seen corresponding path program 1 times [2021-08-29 12:58:31,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:58:31,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922750680] [2021-08-29 12:58:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:58:31,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:58:31,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:58:31,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963339609] [2021-08-29 12:58:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:58:31,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:58:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:58:31,907 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) [2021-08-29 12:58:31,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 12:58:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:58:31,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 12:58:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:58:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:58:32,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:58:32,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:58:32,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922750680] [2021-08-29 12:58:32,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:58:32,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963339609] [2021-08-29 12:58:32,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963339609] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:58:32,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:58:32,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 12:58:32,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643998812] [2021-08-29 12:58:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 12:58:32,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:58:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 12:58:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:58:32,035 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-08-29 12:58:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:58:32,960 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-29 12:58:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:58:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) Word has length 16 [2021-08-29 12:58:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:58:32,961 INFO L225 Difference]: With dead ends: 22 [2021-08-29 12:58:32,961 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 12:58:32,962 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.55ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:58:32,962 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 880.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 888.20ms IncrementalHoareTripleChecker+Time [2021-08-29 12:58:32,963 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 888.20ms Time] [2021-08-29 12:58:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 12:58:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 12:58:32,963 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) [2021-08-29 12:58:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 12:58:32,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-08-29 12:58:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:58:32,964 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 12:58:32,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-08-29 12:58:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 12:58:32,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 12:58:32,966 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 12:58:32,966 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 12:58:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 12:58:33,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 12:58:33,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 12:58:33,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:58:33,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:58:33,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:58:33,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:58:37,881 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 35 46) no Hoare annotation was computed. [2021-08-29 12:58:37,881 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L854 garLoopResultBuilder]: At program point L12-2(line 37) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* 2 ULTIMATE.start_main_~u~0) (* 4 ULTIMATE.start_main_~A~0) (* ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~v~0) (* 4 ULTIMATE.start_main_~r~0)) (+ (* ULTIMATE.start_main_~u~0 ULTIMATE.start_main_~u~0) (* 2 ULTIMATE.start_main_~v~0)))) [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L858 garLoopResultBuilder]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2021-08-29 12:58:37,882 INFO L861 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: true [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 8 10) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L8-3(lines 8 10) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L861 garLoopResultBuilder]: At program point L50(lines 19 51) the Hoare annotation is: true [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L9-2(line 9) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L9-4(line 9) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L9-6(line 9) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 45) no Hoare annotation was computed. [2021-08-29 12:58:37,883 INFO L854 garLoopResultBuilder]: At program point L39-2(lines 35 46) the Hoare annotation is: (let ((.cse0 (= (+ (* 2 ULTIMATE.start_main_~u~0) (* 4 ULTIMATE.start_main_~A~0) (* ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~v~0) (* 4 ULTIMATE.start_main_~r~0)) (+ (* ULTIMATE.start_main_~u~0 ULTIMATE.start_main_~u~0) (* 2 ULTIMATE.start_main_~v~0))))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= (mod (+ ULTIMATE.start_main_~u~0 1) (- 2)) 0) (= ULTIMATE.start_main_~v~0 1) .cse0))) [2021-08-29 12:58:37,886 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 12:58:37,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 12:58:37 BoogieIcfgContainer [2021-08-29 12:58:37,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 12:58:37,917 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 12:58:37,917 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 12:58:37,917 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 12:58:37,918 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:58:21" (3/4) ... [2021-08-29 12:58:37,920 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 12:58:37,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-29 12:58:37,929 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 12:58:37,929 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 12:58:37,929 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 12:58:37,993 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 12:58:37,993 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 12:58:37,994 INFO L158 Benchmark]: Toolchain (without parser) took 16488.57ms. Allocated memory was 62.9MB in the beginning and 92.3MB in the end (delta: 29.4MB). Free memory was 43.9MB in the beginning and 43.5MB in the end (delta: 440.9kB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2021-08-29 12:58:37,994 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:58:37,994 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.74ms. Allocated memory is still 62.9MB. Free memory was 43.8MB in the beginning and 46.8MB in the end (delta: -3.0MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2021-08-29 12:58:37,995 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.64ms. Allocated memory is still 62.9MB. Free memory was 46.8MB in the beginning and 45.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:58:37,995 INFO L158 Benchmark]: Boogie Preprocessor took 22.91ms. Allocated memory is still 62.9MB. Free memory was 45.1MB in the beginning and 43.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:58:37,995 INFO L158 Benchmark]: RCFGBuilder took 209.34ms. Allocated memory is still 62.9MB. Free memory was 43.9MB in the beginning and 35.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 12:58:37,995 INFO L158 Benchmark]: TraceAbstraction took 15945.15ms. Allocated memory was 62.9MB in the beginning and 92.3MB in the end (delta: 29.4MB). Free memory was 34.6MB in the beginning and 46.5MB in the end (delta: -11.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2021-08-29 12:58:37,995 INFO L158 Benchmark]: Witness Printer took 76.30ms. Allocated memory is still 92.3MB. Free memory was 46.5MB in the beginning and 43.5MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:58:37,997 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.74ms. Allocated memory is still 62.9MB. Free memory was 43.8MB in the beginning and 46.8MB in the end (delta: -3.0MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.64ms. Allocated memory is still 62.9MB. Free memory was 46.8MB in the beginning and 45.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.91ms. Allocated memory is still 62.9MB. Free memory was 45.1MB in the beginning and 43.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 209.34ms. Allocated memory is still 62.9MB. Free memory was 43.9MB in the beginning and 35.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 15945.15ms. Allocated memory was 62.9MB in the beginning and 92.3MB in the end (delta: 29.4MB). Free memory was 34.6MB in the beginning and 46.5MB in the end (delta: -11.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * Witness Printer took 76.30ms. Allocated memory is still 92.3MB. Free memory was 46.5MB in the beginning and 43.5MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms 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 - 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 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 15865.79ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 12.28ms, AutomataDifference: 10072.05ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 4707.99ms, InitialAbstractionConstructionTime: 7.54ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 9959.55ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 9928.31ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 150 IncrementalHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 0 mSDtfsCounter, 150 mSolverCounterSat, 1.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.76ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 14.10ms AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 85 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.77ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 4696.50ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 28.95ms SsaConstructionTime, 68.70ms SatisfiabilityAnalysisTime, 309.44ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 13 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 == cond && 2 * u + 4 * A + v * v + 4 * r == u * u + 2 * v - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (1 == cond && 2 * u + 4 * A + v * v + 4 * r == u * u + 2 * v) || (((u + 1) % -2 == 0 && v == 1) && 2 * u + 4 * A + v * v + 4 * r == u * u + 2 * v) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 12:58:38,025 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...