./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/loops/sum01-1.i -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 b8288a9de178793ff8226fcaf13a19528a323382cd8b50b54e8a1ad5ce998241 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:16:00,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:16:00,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:16:00,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:16:00,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:16:00,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:16:00,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:16:00,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:16:00,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:16:00,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:16:00,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:16:00,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:16:00,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:16:00,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:16:01,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:16:01,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:16:01,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:16:01,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:16:01,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:16:01,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:16:01,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:16:01,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:16:01,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:16:01,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:16:01,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:16:01,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:16:01,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:16:01,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:16:01,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:16:01,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:16:01,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:16:01,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:16:01,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:16:01,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:16:01,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:16:01,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:16:01,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:16:01,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:16:01,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:16:01,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:16:01,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:16:01,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:16:01,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:16:01,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:16:01,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:16:01,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:16:01,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:16:01,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:16:01,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:16:01,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:16:01,054 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:16:01,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:16:01,055 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:16:01,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:16:01,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:16:01,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:16:01,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:16:01,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:16:01,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:16:01,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:16:01,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:16:01,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:16:01,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:16:01,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:16:01,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:16:01,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:16:01,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:16:01,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:16:01,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:16:01,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:16:01,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:16:01,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:16:01,058 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:16:01,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:16:01,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:16:01,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:16:01,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8288a9de178793ff8226fcaf13a19528a323382cd8b50b54e8a1ad5ce998241 [2021-12-21 12:16:01,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:16:01,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:16:01,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:16:01,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:16:01,274 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:16:01,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01-1.i [2021-12-21 12:16:01,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20044db6c/97bff60ed6714f7d972f744c74ff9b53/FLAGea9c99f2a [2021-12-21 12:16:01,645 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:16:01,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i [2021-12-21 12:16:01,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20044db6c/97bff60ed6714f7d972f744c74ff9b53/FLAGea9c99f2a [2021-12-21 12:16:02,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20044db6c/97bff60ed6714f7d972f744c74ff9b53 [2021-12-21 12:16:02,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:16:02,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:16:02,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:16:02,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:16:02,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:16:02,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d649556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02, skipping insertion in model container [2021-12-21 12:16:02,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:16:02,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:16:02,222 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/loops/sum01-1.i[808,821] [2021-12-21 12:16:02,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:16:02,245 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:16:02,252 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/loops/sum01-1.i[808,821] [2021-12-21 12:16:02,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:16:02,261 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:16:02,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02 WrapperNode [2021-12-21 12:16:02,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:16:02,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:16:02,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:16:02,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:16:02,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,287 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2021-12-21 12:16:02,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:16:02,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:16:02,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:16:02,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:16:02,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:16:02,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:16:02,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:16:02,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:16:02,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (1/1) ... [2021-12-21 12:16:02,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:16:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:02,326 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) [2021-12-21 12:16:02,336 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 [2021-12-21 12:16:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:16:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:16:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:16:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:16:02,394 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:16:02,395 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:16:02,482 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:16:02,486 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:16:02,487 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:16:02,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:02 BoogieIcfgContainer [2021-12-21 12:16:02,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:16:02,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:16:02,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:16:02,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:16:02,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:16:02" (1/3) ... [2021-12-21 12:16:02,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f87824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:16:02, skipping insertion in model container [2021-12-21 12:16:02,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:02" (2/3) ... [2021-12-21 12:16:02,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f87824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:16:02, skipping insertion in model container [2021-12-21 12:16:02,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:02" (3/3) ... [2021-12-21 12:16:02,494 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2021-12-21 12:16:02,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:16:02,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:16:02,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:16:02,528 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 [2021-12-21 12:16:02,528 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:16:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) [2021-12-21 12:16:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:16:02,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:02,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:16:02,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-21 12:16:02,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:02,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403450832] [2021-12-21 12:16:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:02,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:02,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:02,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403450832] [2021-12-21 12:16:02,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403450832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:16:02,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:16:02,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:16:02,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937974853] [2021-12-21 12:16:02,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:16:02,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:16:02,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:16:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:16:02,701 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:16:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:02,710 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-21 12:16:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:16:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-12-21 12:16:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:02,717 INFO L225 Difference]: With dead ends: 21 [2021-12-21 12:16:02,718 INFO L226 Difference]: Without dead ends: 9 [2021-12-21 12:16:02,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:16:02,724 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:02,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:16:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-21 12:16:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-21 12:16:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-12-21 12:16:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-21 12:16:02,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-21 12:16:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:02,751 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-21 12:16:02,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:16:02,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-21 12:16:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:16:02,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:02,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:16:02,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:16:02,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-12-21 12:16:02,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:02,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536703310] [2021-12-21 12:16:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:02,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:02,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536703310] [2021-12-21 12:16:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536703310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:16:02,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:16:02,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:16:02,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366665423] [2021-12-21 12:16:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:16:02,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:16:02,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:16:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:16:02,861 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-21 12:16:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:02,887 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-21 12:16:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:16:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-12-21 12:16:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:02,889 INFO L225 Difference]: With dead ends: 16 [2021-12-21 12:16:02,889 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 12:16:02,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:16:02,890 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:02,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:16:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 12:16:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 12:16:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-12-21 12:16:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-21 12:16:02,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-12-21 12:16:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:02,894 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-21 12:16:02,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-21 12:16:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-21 12:16:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:16:02,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:02,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:16:02,895 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-12-21 12:16:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486518570] [2021-12-21 12:16:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:02,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:03,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:03,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486518570] [2021-12-21 12:16:03,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486518570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:03,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865398466] [2021-12-21 12:16:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:03,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:03,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:03,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:03,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:16:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:16:03,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:03,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:03,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865398466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:03,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:03,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-21 12:16:03,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811872763] [2021-12-21 12:16:03,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:03,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 12:16:03,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 12:16:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:16:03,387 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-21 12:16:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:03,573 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-12-21 12:16:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 12:16:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 9 [2021-12-21 12:16:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:03,574 INFO L225 Difference]: With dead ends: 31 [2021-12-21 12:16:03,574 INFO L226 Difference]: Without dead ends: 17 [2021-12-21 12:16:03,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-21 12:16:03,576 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:03,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:16:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-21 12:16:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-21 12:16:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-12-21 12:16:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-21 12:16:03,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2021-12-21 12:16:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:03,579 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-21 12:16:03,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-21 12:16:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-21 12:16:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 12:16:03,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:03,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:03,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:03,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:03,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:03,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1577964762, now seen corresponding path program 2 times [2021-12-21 12:16:03,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:03,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557521386] [2021-12-21 12:16:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:03,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:16:03,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557521386] [2021-12-21 12:16:03,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557521386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507963923] [2021-12-21 12:16:03,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:16:03,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:04,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:04,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:16:04,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:16:04,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:16:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 12:16:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:04,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507963923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:04,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:04,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2021-12-21 12:16:04,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046232964] [2021-12-21 12:16:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:04,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 12:16:04,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 12:16:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-12-21 12:16:04,539 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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) [2021-12-21 12:16:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:04,891 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-12-21 12:16:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 12:16:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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 15 [2021-12-21 12:16:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:04,893 INFO L225 Difference]: With dead ends: 36 [2021-12-21 12:16:04,893 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 12:16:04,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 12:16:04,894 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:04,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:16:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 12:16:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-21 12:16:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-21 12:16:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-21 12:16:04,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-12-21 12:16:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:04,898 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-21 12:16:04,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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) [2021-12-21 12:16:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-21 12:16:04,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 12:16:04,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:04,898 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:04,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:05,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 12:16:05,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -790824168, now seen corresponding path program 1 times [2021-12-21 12:16:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:05,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535917826] [2021-12-21 12:16:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:05,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:05,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535917826] [2021-12-21 12:16:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535917826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61077428] [2021-12-21 12:16:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:05,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:05,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:05,157 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:05,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:16:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:05,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 12:16:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:05,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:05,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61077428] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:05,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:05,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-12-21 12:16:05,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906098313] [2021-12-21 12:16:05,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:05,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 12:16:05,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 12:16:05,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:16:05,312 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-12-21 12:16:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:05,352 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-21 12:16:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 12:16:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) Word has length 21 [2021-12-21 12:16:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:05,353 INFO L225 Difference]: With dead ends: 46 [2021-12-21 12:16:05,353 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 12:16:05,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:16:05,354 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:05,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:16:05,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 12:16:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-21 12:16:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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) [2021-12-21 12:16:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-21 12:16:05,358 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2021-12-21 12:16:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:05,359 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-21 12:16:05,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-12-21 12:16:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-21 12:16:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 12:16:05,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:05,360 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:05,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:05,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:05,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1639196496, now seen corresponding path program 2 times [2021-12-21 12:16:05,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:05,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031496206] [2021-12-21 12:16:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:05,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:16:05,601 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:16:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:16:05,630 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:16:05,630 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:16:05,635 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:16:05,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 12:16:05,639 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2021-12-21 12:16:05,641 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:16:05,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:16:05 BoogieIcfgContainer [2021-12-21 12:16:05,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:16:05,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:16:05,679 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:16:05,679 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:16:05,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:02" (3/4) ... [2021-12-21 12:16:05,681 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 12:16:05,713 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:16:05,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:16:05,716 INFO L158 Benchmark]: Toolchain (without parser) took 3641.05ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 76.7MB in the beginning and 56.3MB in the end (delta: 20.4MB). Peak memory consumption was 40.8MB. Max. memory is 16.1GB. [2021-12-21 12:16:05,716 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:16:05,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.71ms. Allocated memory is still 102.8MB. Free memory was 76.5MB in the beginning and 80.4MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:16:05,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.63ms. Allocated memory is still 102.8MB. Free memory was 80.4MB in the beginning and 78.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:16:05,717 INFO L158 Benchmark]: Boogie Preprocessor took 17.61ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 77.9MB in the end (delta: 954.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:16:05,717 INFO L158 Benchmark]: RCFGBuilder took 183.49ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 69.3MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:16:05,717 INFO L158 Benchmark]: TraceAbstraction took 3188.14ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 68.7MB in the beginning and 59.4MB in the end (delta: 9.4MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-12-21 12:16:05,717 INFO L158 Benchmark]: Witness Printer took 36.78ms. Allocated memory is still 123.7MB. Free memory was 59.4MB in the beginning and 56.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:16:05,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.71ms. Allocated memory is still 102.8MB. Free memory was 76.5MB in the beginning and 80.4MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.63ms. Allocated memory is still 102.8MB. Free memory was 80.4MB in the beginning and 78.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.61ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 77.9MB in the end (delta: 954.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 183.49ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 69.3MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3188.14ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 68.7MB in the beginning and 59.4MB in the end (delta: 9.4MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. * Witness Printer took 36.78ms. Allocated memory is still 123.7MB. Free memory was 59.4MB in the beginning and 56.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=10] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=10, n=2] [L24] i++ VAL [i=2, n=2, n=10] [L24] COND TRUE i<=n VAL [i=2, n=2, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=10, n=4] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=6, n=10] [L24] COND TRUE i<=n VAL [i=4, n=10, n=6] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=10, n=8] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=12, n=10] [L24] i++ VAL [i=7, n=12, n=10] [L24] COND TRUE i<=n VAL [i=7, n=12, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=14, n=10] [L24] i++ VAL [i=8, n=14, n=10] [L24] COND TRUE i<=n VAL [i=8, n=10, n=14] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=10, n=16] [L24] i++ VAL [i=9, n=10, n=16] [L24] COND TRUE i<=n VAL [i=9, n=10, n=16] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=18, n=10] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=18, n=10] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=18, n=10] [L24] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 131 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 95 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 363 IncrementalHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 36 mSDtfsCounter, 363 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 958 SizeOfPredicates, 10 NumberOfNonLiveVariables, 157 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 28/144 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 proved your program to be incorrect! [2021-12-21 12:16:05,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE