./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/float-benchs/rlim_invariant.c.p+cfa-reducer.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 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:15:04,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:15:04,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:15:04,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:15:04,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:15:04,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:15:04,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:15:04,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:15:04,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:15:04,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:15:04,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:15:04,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:15:04,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:15:04,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:15:04,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:15:04,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:15:04,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:15:04,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:15:04,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:15:04,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:15:04,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:15:04,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:15:04,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:15:04,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:15:04,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:15:04,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:15:04,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:15:04,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:15:04,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:15:04,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:15:04,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:15:04,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:15:04,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:15:04,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:15:04,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:15:04,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:15:04,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:15:04,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:15:04,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:15:04,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:15:04,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:15:04,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:15:04,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:15:04,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:15:04,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:15:04,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:15:04,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:15:04,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:15:04,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:15:04,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:15:04,361 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:15:04,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:15:04,362 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:15:04,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:15:04,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:15:04,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:15:04,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:15:04,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:15:04,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:15:04,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:15:04,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:15:04,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:15:04,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:15:04,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:15:04,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:15:04,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:15:04,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:15:04,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:15:04,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:15:04,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:15:04,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:15:04,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:15:04,365 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:15:04,365 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:15:04,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:15:04,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:15:04,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e [2021-12-14 13:15:04,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:15:04,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:15:04,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:15:04,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:15:04,562 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:15:04,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-12-14 13:15:04,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f336510/b7090f052ab84275b42bc6e86920ad99/FLAG53a2fa1b0 [2021-12-14 13:15:04,954 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:15:04,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-12-14 13:15:04,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f336510/b7090f052ab84275b42bc6e86920ad99/FLAG53a2fa1b0 [2021-12-14 13:15:05,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f336510/b7090f052ab84275b42bc6e86920ad99 [2021-12-14 13:15:05,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:15:05,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:15:05,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:15:05,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:15:05,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:15:05,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eff9daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05, skipping insertion in model container [2021-12-14 13:15:05,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:15:05,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:15:05,552 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/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-12-14 13:15:05,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:15:05,562 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:15:05,573 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/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-12-14 13:15:05,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:15:05,583 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:15:05,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05 WrapperNode [2021-12-14 13:15:05,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:15:05,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:15:05,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:15:05,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:15:05,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,606 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-14 13:15:05,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:15:05,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:15:05,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:15:05,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:15:05,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:15:05,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:15:05,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:15:05,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:15:05,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (1/1) ... [2021-12-14 13:15:05,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:15:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:15:05,648 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) [2021-12-14 13:15:05,669 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 [2021-12-14 13:15:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:15:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:15:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:15:05,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:15:05,728 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:15:05,729 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:15:05,836 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:15:05,840 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:15:05,844 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 13:15:05,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:05 BoogieIcfgContainer [2021-12-14 13:15:05,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:15:05,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:15:05,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:15:05,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:15:05,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:15:05" (1/3) ... [2021-12-14 13:15:05,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5680ebe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:15:05, skipping insertion in model container [2021-12-14 13:15:05,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:05" (2/3) ... [2021-12-14 13:15:05,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5680ebe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:15:05, skipping insertion in model container [2021-12-14 13:15:05,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:05" (3/3) ... [2021-12-14 13:15:05,873 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_invariant.c.p+cfa-reducer.c [2021-12-14 13:15:05,876 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:15:05,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:15:05,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:15:05,924 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, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:15:05,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:15:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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) [2021-12-14 13:15:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:15:05,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:05,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:05,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash -34829450, now seen corresponding path program 1 times [2021-12-14 13:15:05,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:15:05,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927054067] [2021-12-14 13:15:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:05,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:15:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:06,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:15:06,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927054067] [2021-12-14 13:15:06,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927054067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:06,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:06,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:15:06,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327744942] [2021-12-14 13:15:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:06,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:15:06,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:15:06,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:15:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:15:06,140 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-12-14 13:15:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:15:06,237 INFO L93 Difference]: Finished difference Result 115 states and 167 transitions. [2021-12-14 13:15:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:15:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 [2021-12-14 13:15:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:15:06,247 INFO L225 Difference]: With dead ends: 115 [2021-12-14 13:15:06,248 INFO L226 Difference]: Without dead ends: 92 [2021-12-14 13:15:06,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:15:06,254 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 162 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:15:06,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 194 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:15:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-14 13:15:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 23. [2021-12-14 13:15:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-12-14 13:15:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-12-14 13:15:06,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-12-14 13:15:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:15:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-12-14 13:15:06,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-12-14 13:15:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-12-14 13:15:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:15:06,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:06,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:06,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:15:06,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -17818789, now seen corresponding path program 1 times [2021-12-14 13:15:06,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:15:06,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980185554] [2021-12-14 13:15:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:06,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:15:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:15:06,290 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:15:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:15:06,308 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:15:06,308 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:15:06,310 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:15:06,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:15:06,314 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-14 13:15:06,316 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:15:06,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:15:06 BoogieIcfgContainer [2021-12-14 13:15:06,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:15:06,340 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:15:06,340 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:15:06,340 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:15:06,340 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:05" (3/4) ... [2021-12-14 13:15:06,342 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 13:15:06,343 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:15:06,343 INFO L158 Benchmark]: Toolchain (without parser) took 948.99ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 50.7MB in the beginning and 83.7MB in the end (delta: -33.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:15:06,344 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 57.3MB in the beginning and 57.3MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:15:06,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.86ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 50.5MB in the beginning and 83.5MB in the end (delta: -33.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:15:06,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.67ms. Allocated memory is still 107.0MB. Free memory was 83.3MB in the beginning and 81.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:15:06,345 INFO L158 Benchmark]: Boogie Preprocessor took 12.77ms. Allocated memory is still 107.0MB. Free memory was 81.8MB in the beginning and 80.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:15:06,345 INFO L158 Benchmark]: RCFGBuilder took 225.76ms. Allocated memory is still 107.0MB. Free memory was 80.8MB in the beginning and 71.4MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:15:06,345 INFO L158 Benchmark]: TraceAbstraction took 492.04ms. Allocated memory is still 107.0MB. Free memory was 70.9MB in the beginning and 84.3MB in the end (delta: -13.4MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2021-12-14 13:15:06,346 INFO L158 Benchmark]: Witness Printer took 3.10ms. Allocated memory is still 107.0MB. Free memory is still 83.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:15:06,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 57.3MB in the beginning and 57.3MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.86ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 50.5MB in the beginning and 83.5MB in the end (delta: -33.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.67ms. Allocated memory is still 107.0MB. Free memory was 83.3MB in the beginning and 81.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.77ms. Allocated memory is still 107.0MB. Free memory was 81.8MB in the beginning and 80.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 225.76ms. Allocated memory is still 107.0MB. Free memory was 80.8MB in the beginning and 71.4MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 492.04ms. Allocated memory is still 107.0MB. Free memory was 70.9MB in the beginning and 84.3MB in the end (delta: -13.4MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. * Witness Printer took 3.10ms. Allocated memory is still 107.0MB. Free memory is still 83.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 66]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 48, overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of to_real at line 20, overapproximation of someBinaryArithmeticFLOAToperation at line 50. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L14] float main__X; [L15] float main__Y; [L16] float main__S; [L17] float main__R; [L18] float main__D; [L19] int main__i; [L20] main__Y = 0 [L21] main__i = 0 VAL [__return_main=0, main__i=0] [L23] COND TRUE main__i < 100000 [L25] main__X = __VERIFIER_nondet_float() [L26] main__D = __VERIFIER_nondet_float() [L27] int main____CPAchecker_TMP_0; VAL [__return_main=0, main__D=51, main__i=0, main__X=50] [L28] COND TRUE main__X >= -128.0 VAL [__return_main=0, main__D=51, main__i=0, main__X=50] [L30] COND TRUE main__X <= 128.0 [L32] main____CPAchecker_TMP_0 = 1 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__D=51, main__i=0, main__X=50] [L34] COND TRUE main____CPAchecker_TMP_0 != 0 [L36] int main____CPAchecker_TMP_1; VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__D=51, main__i=0, main__X=50] [L37] COND TRUE main__D >= 0.0 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__D=51, main__i=0, main__X=50] [L39] COND TRUE main__D <= 16.0 [L41] main____CPAchecker_TMP_1 = 1 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__D=51, main__i=0, main__X=50] [L43] COND TRUE main____CPAchecker_TMP_1 != 0 [L45] main__S = main__Y [L46] main__Y = main__X [L47] main__R = main__X - main__S VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__D=51, main__i=0, main__S=49, main__X=50, main__Y=50] [L48] COND TRUE main__R <= (-main__D) [L50] main__Y = main__S - main__D VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__D=51, main__i=0, main__S=49, main__X=50] [L52] int main____CPAchecker_TMP_2; VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__D=51, main__i=0, main__S=49, main__X=50] [L53] COND FALSE !(main__Y >= -129.0) VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__D=51, main__i=0, main__S=49, main__X=50] [L79] main____CPAchecker_TMP_2 = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__D=51, main__i=0, main__S=49, main__X=50] [L60] int __tmp_1; [L61] __tmp_1 = main____CPAchecker_TMP_2 [L62] int __VERIFIER_assert__cond; [L63] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__D=51, main__i=0, main__S=49, main__X=50] [L64] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__D=51, main__i=0, main__S=49, main__X=50] [L66] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__D=51, main__i=0, main__S=49, main__X=50] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 194 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 134 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 31 IncrementalHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 60 mSDtfsCounter, 31 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 9, 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, 1 MinimizatonAttempts, 69 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-14 13:15:06,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:15:08,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:15:08,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:15:08,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:15:08,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:15:08,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:15:08,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:15:08,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:15:08,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:15:08,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:15:08,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:15:08,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:15:08,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:15:08,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:15:08,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:15:08,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:15:08,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:15:08,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:15:08,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:15:08,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:15:08,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:15:08,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:15:08,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:15:08,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:15:08,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:15:08,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:15:08,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:15:08,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:15:08,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:15:08,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:15:08,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:15:08,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:15:08,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:15:08,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:15:08,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:15:08,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:15:08,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:15:08,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:15:08,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:15:08,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:15:08,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:15:08,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 13:15:08,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:15:08,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:15:08,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:15:08,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:15:08,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:15:08,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:15:08,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:15:08,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:15:08,195 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:15:08,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:15:08,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:15:08,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 13:15:08,196 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 13:15:08,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:15:08,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:15:08,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:15:08,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:15:08,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:15:08,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:15:08,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:15:08,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:15:08,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:15:08,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:15:08,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:15:08,202 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 13:15:08,203 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e [2021-12-14 13:15:08,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:15:08,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:15:08,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:15:08,500 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:15:08,500 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:15:08,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-12-14 13:15:08,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb8444db2/3a22545e4da54519ad81d49bc5dd0381/FLAG818054c28 [2021-12-14 13:15:08,914 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:15:08,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-12-14 13:15:08,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb8444db2/3a22545e4da54519ad81d49bc5dd0381/FLAG818054c28 [2021-12-14 13:15:08,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb8444db2/3a22545e4da54519ad81d49bc5dd0381 [2021-12-14 13:15:08,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:15:08,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:15:08,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:15:08,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:15:08,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:15:08,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:15:08" (1/1) ... [2021-12-14 13:15:08,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a901f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:08, skipping insertion in model container [2021-12-14 13:15:08,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:15:08" (1/1) ... [2021-12-14 13:15:08,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:15:08,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:15:09,092 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/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-12-14 13:15:09,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:15:09,118 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:15:09,155 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/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-12-14 13:15:09,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:15:09,175 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:15:09,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09 WrapperNode [2021-12-14 13:15:09,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:15:09,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:15:09,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:15:09,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:15:09,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,213 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2021-12-14 13:15:09,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:15:09,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:15:09,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:15:09,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:15:09,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:15:09,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:15:09,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:15:09,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:15:09,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (1/1) ... [2021-12-14 13:15:09,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:15:09,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:15:09,293 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) [2021-12-14 13:15:09,319 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 [2021-12-14 13:15:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:15:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 13:15:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:15:09,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:15:09,384 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:15:09,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:15:10,264 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:15:10,268 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:15:10,268 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 13:15:10,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:10 BoogieIcfgContainer [2021-12-14 13:15:10,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:15:10,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:15:10,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:15:10,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:15:10,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:15:08" (1/3) ... [2021-12-14 13:15:10,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffbcd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:15:10, skipping insertion in model container [2021-12-14 13:15:10,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:09" (2/3) ... [2021-12-14 13:15:10,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffbcd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:15:10, skipping insertion in model container [2021-12-14 13:15:10,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:10" (3/3) ... [2021-12-14 13:15:10,274 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_invariant.c.p+cfa-reducer.c [2021-12-14 13:15:10,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:15:10,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:15:10,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:15:10,330 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, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:15:10,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:15:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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) [2021-12-14 13:15:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:15:10,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:10,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:10,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -34829450, now seen corresponding path program 1 times [2021-12-14 13:15:10,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:15:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915390454] [2021-12-14 13:15:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:10,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:15:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:15:10,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:15:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 13:15:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:15:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:15:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:10,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:15:10,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:15:10,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915390454] [2021-12-14 13:15:10,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915390454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:10,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:10,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:15:10,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033902389] [2021-12-14 13:15:10,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:10,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:15:10,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:15:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:15:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:15:10,633 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-12-14 13:15:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:15:10,696 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-12-14 13:15:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:15:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-12-14 13:15:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:15:10,704 INFO L225 Difference]: With dead ends: 51 [2021-12-14 13:15:10,704 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 13:15:10,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:15:10,712 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 53 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:15:10,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 122 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:15:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 13:15:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-12-14 13:15:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-12-14 13:15:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-12-14 13:15:10,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-12-14 13:15:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:15:10,743 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-12-14 13:15:10,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-12-14 13:15:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-12-14 13:15:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:15:10,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:10,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:10,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-14 13:15:10,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:15:10,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash -17818789, now seen corresponding path program 1 times [2021-12-14 13:15:10,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:15:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433704087] [2021-12-14 13:15:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:10,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:15:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:15:10,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:15:10,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 13:15:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 13:15:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:15:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:15,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:15:15,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:15:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433704087] [2021-12-14 13:15:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433704087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:15,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:15,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:15:15,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506049455] [2021-12-14 13:15:15,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:15,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:15:15,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:15:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:15:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:15:15,671 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-12-14 13:15:22,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:15:22,151 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2021-12-14 13:15:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 13:15:22,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 [2021-12-14 13:15:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:15:22,158 INFO L225 Difference]: With dead ends: 86 [2021-12-14 13:15:22,158 INFO L226 Difference]: Without dead ends: 65 [2021-12-14 13:15:22,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:15:22,160 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-14 13:15:22,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 89 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 36 Unchecked, 4.5s Time] [2021-12-14 13:15:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-14 13:15:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2021-12-14 13:15:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 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) [2021-12-14 13:15:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2021-12-14 13:15:22,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 16 [2021-12-14 13:15:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:15:22,166 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2021-12-14 13:15:22,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-12-14 13:15:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2021-12-14 13:15:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:15:22,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:22,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:22,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:15:22,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:15:22,369 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1271663018, now seen corresponding path program 1 times [2021-12-14 13:15:22,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:15:22,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122158449] [2021-12-14 13:15:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:22,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:15:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:15:22,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:15:22,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 13:15:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 13:15:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:15:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:22,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:15:22,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:15:22,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122158449] [2021-12-14 13:15:22,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122158449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:22,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:22,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:15:22,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590987706] [2021-12-14 13:15:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:22,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:15:22,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:15:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:15:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:15:22,469 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-12-14 13:15:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:15:22,593 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-12-14 13:15:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:15:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2021-12-14 13:15:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:15:22,598 INFO L225 Difference]: With dead ends: 56 [2021-12-14 13:15:22,598 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 13:15:22,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:15:22,599 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:15:22,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:15:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 13:15:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-14 13:15:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2021-12-14 13:15:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-14 13:15:22,603 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 16 [2021-12-14 13:15:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:15:22,604 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-14 13:15:22,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-12-14 13:15:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-14 13:15:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 13:15:22,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:22,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:22,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:15:22,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:15:22,805 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1069421883, now seen corresponding path program 1 times [2021-12-14 13:15:22,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:15:22,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086185636] [2021-12-14 13:15:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:22,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:15:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:15:22,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:15:22,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 13:15:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:22,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 13:15:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:15:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:27,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:15:27,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:15:27,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086185636] [2021-12-14 13:15:27,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086185636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:27,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:27,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:15:27,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461076660] [2021-12-14 13:15:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:27,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:15:27,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:15:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:15:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:15:27,997 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-12-14 13:15:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:15:33,736 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-12-14 13:15:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 13:15:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 17 [2021-12-14 13:15:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:15:33,744 INFO L225 Difference]: With dead ends: 56 [2021-12-14 13:15:33,744 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 13:15:33,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:15:33,745 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:15:33,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 19 Unchecked, 4.0s Time] [2021-12-14 13:15:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 13:15:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-12-14 13:15:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2021-12-14 13:15:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-14 13:15:33,749 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 17 [2021-12-14 13:15:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:15:33,750 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-14 13:15:33,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-12-14 13:15:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-14 13:15:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 13:15:33,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:33,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:15:33,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:15:33,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1450538051, now seen corresponding path program 1 times [2021-12-14 13:15:33,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:15:33,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257817994] [2021-12-14 13:15:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:33,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:15:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:15:33,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:15:33,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 13:15:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:15:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:15:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:36,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:15:36,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:15:36,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257817994] [2021-12-14 13:15:36,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257817994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:36,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:36,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:15:36,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615074097] [2021-12-14 13:15:36,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:36,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:15:36,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:15:36,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:15:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:15:36,919 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-14 13:15:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:15:51,947 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2021-12-14 13:15:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:15:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2021-12-14 13:15:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:15:51,956 INFO L225 Difference]: With dead ends: 128 [2021-12-14 13:15:51,956 INFO L226 Difference]: Without dead ends: 108 [2021-12-14 13:15:51,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:15:51,958 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-12-14 13:15:51,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 64 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2021-12-14 13:15:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-14 13:15:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2021-12-14 13:15:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 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) [2021-12-14 13:15:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2021-12-14 13:15:51,971 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 17 [2021-12-14 13:15:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:15:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2021-12-14 13:15:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-14 13:15:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2021-12-14 13:15:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 13:15:51,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:15:51,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:15:51,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:15:52,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:15:52,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:15:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:15:52,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1069229389, now seen corresponding path program 1 times [2021-12-14 13:15:52,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:15:52,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227714400] [2021-12-14 13:15:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:15:52,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:15:52,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:15:52,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:15:52,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 13:15:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:15:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 13:15:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:15:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:15:59,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:15:59,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:15:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227714400] [2021-12-14 13:15:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227714400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:15:59,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:15:59,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:15:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678663957] [2021-12-14 13:15:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:15:59,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:15:59,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:15:59,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:15:59,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:15:59,524 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-12-14 13:16:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:16:03,612 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2021-12-14 13:16:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:16:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 17 [2021-12-14 13:16:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:16:03,619 INFO L225 Difference]: With dead ends: 81 [2021-12-14 13:16:03,619 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 13:16:03,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:16:03,622 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:16:03,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 16 Unchecked, 2.3s Time] [2021-12-14 13:16:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 13:16:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-12-14 13:16:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 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) [2021-12-14 13:16:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2021-12-14 13:16:03,631 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 17 [2021-12-14 13:16:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:16:03,632 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2021-12-14 13:16:03,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-12-14 13:16:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2021-12-14 13:16:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 13:16:03,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:16:03,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:16:03,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 13:16:03,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:16:03,840 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:16:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:16:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1175383176, now seen corresponding path program 1 times [2021-12-14 13:16:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:16:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254587549] [2021-12-14 13:16:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:16:03,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:16:03,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:16:03,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:16:03,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 13:16:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:16:03,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 13:16:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:16:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:16:03,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:16:03,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:16:03,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254587549] [2021-12-14 13:16:03,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254587549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:16:03,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:16:03,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:16:03,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791734536] [2021-12-14 13:16:03,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:16:03,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:16:03,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:16:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:16:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:16:03,920 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-14 13:16:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:16:03,982 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-12-14 13:16:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:16:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2021-12-14 13:16:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:16:03,982 INFO L225 Difference]: With dead ends: 75 [2021-12-14 13:16:03,982 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 13:16:03,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:16:03,983 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:16:03,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:16:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 13:16:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-14 13:16:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 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) [2021-12-14 13:16:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-14 13:16:03,990 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 17 [2021-12-14 13:16:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:16:03,993 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-14 13:16:03,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-14 13:16:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-14 13:16:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:16:03,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:16:03,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:16:04,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 13:16:04,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:16:04,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:16:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:16:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1724506925, now seen corresponding path program 1 times [2021-12-14 13:16:04,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:16:04,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83058105] [2021-12-14 13:16:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:16:04,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:16:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:16:04,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:16:04,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 13:16:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:16:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 13:16:04,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:16:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:16:11,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:16:11,589 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:16:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83058105] [2021-12-14 13:16:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83058105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:16:11,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:16:11,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:16:11,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895512447] [2021-12-14 13:16:11,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:16:11,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:16:11,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:16:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:16:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:16:11,590 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-12-14 13:16:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:16:17,357 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-12-14 13:16:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 13:16:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2021-12-14 13:16:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:16:17,366 INFO L225 Difference]: With dead ends: 64 [2021-12-14 13:16:17,366 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 13:16:17,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:16:17,367 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-14 13:16:17,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 21 Unchecked, 3.4s Time] [2021-12-14 13:16:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 13:16:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-12-14 13:16:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-12-14 13:16:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-14 13:16:17,372 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 18 [2021-12-14 13:16:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:16:17,372 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-14 13:16:17,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-12-14 13:16:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-14 13:16:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 13:16:17,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:16:17,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:16:17,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-14 13:16:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:16:17,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:16:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:16:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash -66815887, now seen corresponding path program 1 times [2021-12-14 13:16:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:16:17,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318084210] [2021-12-14 13:16:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:16:17,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:16:17,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:16:17,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:16:17,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 13:16:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:16:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 13:16:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates...