./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/ps2-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d25bbd57503ddf7114a4e56e0d2f1aa1d87b632e5d2d981ebfe6e2db50f2e17b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 16:30:42,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 16:30:42,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 16:30:42,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 16:30:42,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 16:30:42,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 16:30:42,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 16:30:42,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 16:30:42,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 16:30:42,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 16:30:42,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 16:30:42,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 16:30:42,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 16:30:42,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 16:30:42,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 16:30:42,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 16:30:42,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 16:30:42,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 16:30:42,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 16:30:42,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 16:30:42,458 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 16:30:42,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 16:30:42,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 16:30:42,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 16:30:42,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 16:30:42,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 16:30:42,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 16:30:42,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 16:30:42,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 16:30:42,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 16:30:42,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 16:30:42,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 16:30:42,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 16:30:42,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 16:30:42,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 16:30:42,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 16:30:42,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 16:30:42,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 16:30:42,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 16:30:42,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 16:30:42,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 16:30:42,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 16:30:42,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 16:30:42,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 16:30:42,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 16:30:42,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 16:30:42,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 16:30:42,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 16:30:42,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 16:30:42,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 16:30:42,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 16:30:42,509 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 16:30:42,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 16:30:42,510 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 16:30:42,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 16:30:42,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 16:30:42,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 16:30:42,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 16:30:42,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 16:30:42,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 16:30:42,512 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 16:30:42,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 16:30:42,513 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 16:30:42,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 16:30:42,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 16:30:42,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 16:30:42,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 16:30:42,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:30:42,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 16:30:42,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 16:30:42,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 16:30:42,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 16:30:42,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 16:30:42,516 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 16:30:42,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 16:30:42,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 16:30:42,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d25bbd57503ddf7114a4e56e0d2f1aa1d87b632e5d2d981ebfe6e2db50f2e17b [2022-07-19 16:30:42,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 16:30:42,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 16:30:42,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 16:30:42,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 16:30:42,768 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 16:30:42,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c [2022-07-19 16:30:42,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6cf3aa1/1801270263f842c7b122e9256e5f8a91/FLAGf24ee6e99 [2022-07-19 16:30:43,167 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 16:30:43,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c [2022-07-19 16:30:43,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6cf3aa1/1801270263f842c7b122e9256e5f8a91/FLAGf24ee6e99 [2022-07-19 16:30:43,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6cf3aa1/1801270263f842c7b122e9256e5f8a91 [2022-07-19 16:30:43,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 16:30:43,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 16:30:43,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 16:30:43,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 16:30:43,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 16:30:43,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c1bbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43, skipping insertion in model container [2022-07-19 16:30:43,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 16:30:43,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 16:30:43,317 WARN L230 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/ps2-ll_unwindbound20.c[454,467] [2022-07-19 16:30:43,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:30:43,356 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 16:30:43,369 WARN L230 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/ps2-ll_unwindbound20.c[454,467] [2022-07-19 16:30:43,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:30:43,389 INFO L208 MainTranslator]: Completed translation [2022-07-19 16:30:43,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43 WrapperNode [2022-07-19 16:30:43,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 16:30:43,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 16:30:43,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 16:30:43,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 16:30:43,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,419 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-07-19 16:30:43,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 16:30:43,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 16:30:43,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 16:30:43,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 16:30:43,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 16:30:43,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 16:30:43,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 16:30:43,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 16:30:43,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (1/1) ... [2022-07-19 16:30:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:30:43,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:30:43,470 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) [2022-07-19 16:30:43,472 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 [2022-07-19 16:30:43,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 16:30:43,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 16:30:43,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 16:30:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 16:30:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 16:30:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 16:30:43,545 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 16:30:43,546 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 16:30:43,617 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 16:30:43,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 16:30:43,622 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 16:30:43,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:30:43 BoogieIcfgContainer [2022-07-19 16:30:43,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 16:30:43,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 16:30:43,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 16:30:43,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 16:30:43,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 04:30:43" (1/3) ... [2022-07-19 16:30:43,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398b55c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:30:43, skipping insertion in model container [2022-07-19 16:30:43,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:30:43" (2/3) ... [2022-07-19 16:30:43,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398b55c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:30:43, skipping insertion in model container [2022-07-19 16:30:43,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:30:43" (3/3) ... [2022-07-19 16:30:43,630 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound20.c [2022-07-19 16:30:43,642 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 16:30:43,642 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 16:30:43,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 16:30:43,683 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e884036, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@732af0b0 [2022-07-19 16:30:43,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 16:30:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 16:30:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 16:30:43,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:30:43,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:30:43,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:30:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:30:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2022-07-19 16:30:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:30:43,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077661228] [2022-07-19 16:30:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:30:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:30:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:30:43,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077661228] [2022-07-19 16:30:43,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077661228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:30:43,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:30:43,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 16:30:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647223281] [2022-07-19 16:30:43,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:30:43,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 16:30:43,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 16:30:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:30:43,829 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-07-19 16:30:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:30:43,844 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-07-19 16:30:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 16:30:43,846 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 [2022-07-19 16:30:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:30:43,853 INFO L225 Difference]: With dead ends: 32 [2022-07-19 16:30:43,853 INFO L226 Difference]: Without dead ends: 13 [2022-07-19 16:30:43,855 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 [2022-07-19 16:30:43,858 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2022-07-19 16:30:43,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:30:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-19 16:30:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-19 16:30:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:30:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-19 16:30:43,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-07-19 16:30:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:30:43,884 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-19 16:30:43,884 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) [2022-07-19 16:30:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-19 16:30:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 16:30:43,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:30:43,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:30:43,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 16:30:43,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:30:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:30:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2022-07-19 16:30:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:30:43,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92198417] [2022-07-19 16:30:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:30:43,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:30:43,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722765075] [2022-07-19 16:30:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:43,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:43,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:30:43,905 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) [2022-07-19 16:30:43,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 16:30:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:30:43,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 16:30:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:30:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:30:44,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:30:44,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92198417] [2022-07-19 16:30:44,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:30:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722765075] [2022-07-19 16:30:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722765075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:30:44,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:30:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 16:30:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129129093] [2022-07-19 16:30:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:30:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 16:30:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 16:30:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 16:30:44,045 INFO L87 Difference]: Start difference. First operand 13 states and 15 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) [2022-07-19 16:30:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:30:44,060 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-19 16:30:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 16:30:44,061 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 [2022-07-19 16:30:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:30:44,062 INFO L225 Difference]: With dead ends: 22 [2022-07-19 16:30:44,072 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 16:30:44,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 16:30:44,074 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 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 [2022-07-19 16:30:44,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:30:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 16:30:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 16:30:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:30:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-19 16:30:44,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-07-19 16:30:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:30:44,079 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-19 16:30:44,079 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) [2022-07-19 16:30:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-19 16:30:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 16:30:44,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:30:44,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:30:44,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 16:30:44,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:44,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:30:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:30:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2022-07-19 16:30:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:30:44,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121588049] [2022-07-19 16:30:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:30:44,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:30:44,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798717027] [2022-07-19 16:30:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:44,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:30:44,309 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) [2022-07-19 16:30:44,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 16:30:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:30:44,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 16:30:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:30:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:30:44,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:30:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121588049] [2022-07-19 16:30:44,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:30:44,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798717027] [2022-07-19 16:30:44,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798717027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:30:44,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:30:44,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:30:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807215830] [2022-07-19 16:30:44,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:30:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:30:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:30:44,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:30:44,450 INFO L87 Difference]: Start difference. First operand 15 states and 17 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) [2022-07-19 16:30:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:30:44,489 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-19 16:30:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:30:44,490 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 [2022-07-19 16:30:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:30:44,491 INFO L225 Difference]: With dead ends: 24 [2022-07-19 16:30:44,491 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 16:30:44,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:30:44,492 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:30:44,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:30:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 16:30:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 16:30:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 16:30:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-19 16:30:44,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2022-07-19 16:30:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:30:44,498 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-19 16:30:44,498 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) [2022-07-19 16:30:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-19 16:30:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 16:30:44,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:30:44,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:30:44,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 16:30:44,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 16:30:44,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:30:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:30:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times [2022-07-19 16:30:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:30:44,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84894947] [2022-07-19 16:30:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:30:44,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:30:44,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432381666] [2022-07-19 16:30:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:30:44,726 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) [2022-07-19 16:30:44,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 16:30:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:30:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 16:30:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:30:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:30:44,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:30:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:30:44,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84894947] [2022-07-19 16:30:44,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:30:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432381666] [2022-07-19 16:30:44,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432381666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:30:44,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:30:44,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-19 16:30:44,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642758595] [2022-07-19 16:30:44,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:30:44,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 16:30:44,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 16:30:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:30:44,860 INFO L87 Difference]: Start difference. First operand 21 states and 23 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 16:30:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:30:44,921 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-07-19 16:30:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:30:44,922 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-07-19 16:30:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:30:44,924 INFO L225 Difference]: With dead ends: 52 [2022-07-19 16:30:44,925 INFO L226 Difference]: Without dead ends: 45 [2022-07-19 16:30:44,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 16:30:44,931 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:30:44,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 64 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:30:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-19 16:30:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-07-19 16:30:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 16:30:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-19 16:30:44,948 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16 [2022-07-19 16:30:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:30:44,948 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-19 16:30:44,948 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 16:30:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-19 16:30:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 16:30:44,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:30:44,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:30:44,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 16:30:45,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:45,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:30:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:30:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times [2022-07-19 16:30:45,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:30:45,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238590006] [2022-07-19 16:30:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:45,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:30:45,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:30:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125343629] [2022-07-19 16:30:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:45,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:45,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:30:45,179 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) [2022-07-19 16:30:45,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 16:30:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:30:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 16:30:45,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:30:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:30:45,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:30:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 16:30:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238590006] [2022-07-19 16:30:45,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:30:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125343629] [2022-07-19 16:30:45,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125343629] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 16:30:45,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:30:45,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-19 16:30:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268212773] [2022-07-19 16:30:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:30:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:30:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:30:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:30:45,352 INFO L87 Difference]: Start difference. First operand 41 states and 47 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:30:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:30:45,372 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-07-19 16:30:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:30:45,373 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 16:30:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:30:45,373 INFO L225 Difference]: With dead ends: 41 [2022-07-19 16:30:45,373 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 16:30:45,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:30:45,375 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:30:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:30:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 16:30:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 16:30:45,376 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) [2022-07-19 16:30:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 16:30:45,376 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2022-07-19 16:30:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:30:45,377 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 16:30:45,377 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:30:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 16:30:45,377 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 16:30:45,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 16:30:45,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 16:30:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:45,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 16:30:45,638 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 16:30:45,638 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2022-07-19 16:30:45,638 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) [2022-07-19 16:30:45,639 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) [2022-07-19 16:30:45,639 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 16:30:45,639 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 16:30:45,639 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 16:30:45,640 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) [2022-07-19 16:30:45,640 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-07-19 16:30:45,640 INFO L902 garLoopResultBuilder]: At program point L39(lines 18 40) the Hoare annotation is: true [2022-07-19 16:30:45,640 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-07-19 16:30:45,640 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-07-19 16:30:45,641 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-07-19 16:30:45,641 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-07-19 16:30:45,641 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-07-19 16:30:45,641 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-07-19 16:30:45,641 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-07-19 16:30:45,644 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 16:30:45,646 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 16:30:45,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 04:30:45 BoogieIcfgContainer [2022-07-19 16:30:45,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 16:30:45,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 16:30:45,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 16:30:45,668 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 16:30:45,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:30:43" (3/4) ... [2022-07-19 16:30:45,670 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 16:30:45,676 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-19 16:30:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-19 16:30:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-19 16:30:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 16:30:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 16:30:45,715 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 16:30:45,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 16:30:45,716 INFO L158 Benchmark]: Toolchain (without parser) took 2531.55ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 63.9MB in the beginning and 62.7MB in the end (delta: 1.2MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. [2022-07-19 16:30:45,716 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 94.4MB. Free memory was 50.2MB in the beginning and 50.1MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 16:30:45,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.09ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 63.6MB in the beginning and 103.4MB in the end (delta: -39.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 16:30:45,719 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.50ms. Allocated memory is still 127.9MB. Free memory was 103.0MB in the beginning and 101.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 16:30:45,720 INFO L158 Benchmark]: Boogie Preprocessor took 25.42ms. Allocated memory is still 127.9MB. Free memory was 101.8MB in the beginning and 100.9MB in the end (delta: 893.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 16:30:45,720 INFO L158 Benchmark]: RCFGBuilder took 177.61ms. Allocated memory is still 127.9MB. Free memory was 100.9MB in the beginning and 91.9MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 16:30:45,721 INFO L158 Benchmark]: TraceAbstraction took 2042.93ms. Allocated memory is still 127.9MB. Free memory was 91.4MB in the beginning and 65.4MB in the end (delta: 26.0MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2022-07-19 16:30:45,721 INFO L158 Benchmark]: Witness Printer took 47.43ms. Allocated memory is still 127.9MB. Free memory was 65.4MB in the beginning and 62.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 16:30:45,724 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 94.4MB. Free memory was 50.2MB in the beginning and 50.1MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.09ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 63.6MB in the beginning and 103.4MB in the end (delta: -39.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.50ms. Allocated memory is still 127.9MB. Free memory was 103.0MB in the beginning and 101.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.42ms. Allocated memory is still 127.9MB. Free memory was 101.8MB in the beginning and 100.9MB in the end (delta: 893.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 177.61ms. Allocated memory is still 127.9MB. Free memory was 100.9MB in the beginning and 91.9MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2042.93ms. Allocated memory is still 127.9MB. Free memory was 91.4MB in the beginning and 65.4MB in the end (delta: 26.0MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * Witness Printer took 47.43ms. Allocated memory is still 127.9MB. Free memory was 65.4MB in the beginning and 62.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 182 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 113 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 69 mSDtfsCounter, 68 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 29 HoareAnnotationTreeSize, 16 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 56 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 250 SizeOfPredicates, 3 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 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: 27]: Loop Invariant Derived loop invariant: 2 * x == y + y * y - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 16:30:45,758 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