./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/sqrt1-ll.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 9ed748155954ba99e6e57d7fa3ec0dae8b69471a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 05:00:01,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 05:00:01,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 05:00:01,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 05:00:01,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 05:00:01,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 05:00:01,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 05:00:01,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 05:00:01,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 05:00:01,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 05:00:01,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 05:00:01,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 05:00:01,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 05:00:01,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 05:00:01,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 05:00:01,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 05:00:01,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 05:00:01,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 05:00:01,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 05:00:01,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 05:00:01,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 05:00:01,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 05:00:01,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 05:00:01,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 05:00:01,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 05:00:01,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 05:00:01,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 05:00:01,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 05:00:01,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 05:00:01,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 05:00:01,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 05:00:01,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 05:00:01,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 05:00:01,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 05:00:01,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 05:00:01,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 05:00:01,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 05:00:01,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 05:00:01,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 05:00:01,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 05:00:01,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 05:00:01,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 05:00:01,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 05:00:01,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 05:00:01,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 05:00:01,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 05:00:01,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 05:00:01,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 05:00:01,401 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 05:00:01,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 05:00:01,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 05:00:01,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 05:00:01,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 05:00:01,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 05:00:01,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 05:00:01,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 05:00:01,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 05:00:01,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 05:00:01,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 05:00:01,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 05:00:01,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 05:00:01,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 05:00:01,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 05:00:01,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 05:00:01,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:00:01,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 05:00:01,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 05:00:01,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 05:00:01,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 05:00:01,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 05:00:01,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 05:00:01,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 05:00:01,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ed748155954ba99e6e57d7fa3ec0dae8b69471a [2021-08-26 05:00:01,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 05:00:01,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 05:00:01,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 05:00:01,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 05:00:01,783 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 05:00:01,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2021-08-26 05:00:01,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5232e3bc0/0765277c93074623b0b75f52884fc5de/FLAGe6d0bf008 [2021-08-26 05:00:02,217 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 05:00:02,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2021-08-26 05:00:02,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5232e3bc0/0765277c93074623b0b75f52884fc5de/FLAGe6d0bf008 [2021-08-26 05:00:02,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5232e3bc0/0765277c93074623b0b75f52884fc5de [2021-08-26 05:00:02,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 05:00:02,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 05:00:02,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 05:00:02,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 05:00:02,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 05:00:02,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342fae90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02, skipping insertion in model container [2021-08-26 05:00:02,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 05:00:02,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 05:00:02,745 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/sqrt1-ll.c[520,533] [2021-08-26 05:00:02,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:00:02,763 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 05:00:02,773 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/sqrt1-ll.c[520,533] [2021-08-26 05:00:02,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:00:02,787 INFO L208 MainTranslator]: Completed translation [2021-08-26 05:00:02,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02 WrapperNode [2021-08-26 05:00:02,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 05:00:02,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 05:00:02,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 05:00:02,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 05:00:02,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 05:00:02,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 05:00:02,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 05:00:02,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 05:00:02,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 05:00:02,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 05:00:02,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 05:00:02,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 05:00:02,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (1/1) ... [2021-08-26 05:00:02,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:00:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:02,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 05:00:02,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 05:00:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 05:00:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 05:00:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 05:00:02,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 05:00:03,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 05:00:03,168 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-26 05:00:03,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:00:03 BoogieIcfgContainer [2021-08-26 05:00:03,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 05:00:03,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 05:00:03,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 05:00:03,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 05:00:03,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:00:02" (1/3) ... [2021-08-26 05:00:03,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa920a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:00:03, skipping insertion in model container [2021-08-26 05:00:03,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:02" (2/3) ... [2021-08-26 05:00:03,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa920a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:00:03, skipping insertion in model container [2021-08-26 05:00:03,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:00:03" (3/3) ... [2021-08-26 05:00:03,203 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2021-08-26 05:00:03,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 05:00:03,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-26 05:00:03,279 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 05:00:03,289 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 05:00:03,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-26 05:00:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 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) [2021-08-26 05:00:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 05:00:03,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:03,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 05:00:03,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-08-26 05:00:03,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:03,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233168261] [2021-08-26 05:00:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:03,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:03,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:03,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233168261] [2021-08-26 05:00:03,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233168261] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:03,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:03,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:00:03,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216616204] [2021-08-26 05:00:03,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:00:03,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:00:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:00:03,560 INFO L87 Difference]: Start difference. First operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:03,647 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-08-26 05:00:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:00:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-08-26 05:00:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:03,655 INFO L225 Difference]: With dead ends: 57 [2021-08-26 05:00:03,655 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 05:00:03,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 05:00:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-08-26 05:00:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-08-26 05:00:03,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 5 [2021-08-26 05:00:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:03,685 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-08-26 05:00:03,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-08-26 05:00:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 05:00:03,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:03,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:03,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 05:00:03,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1810815341, now seen corresponding path program 1 times [2021-08-26 05:00:03,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:03,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508759584] [2021-08-26 05:00:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:03,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:03,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:03,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964220379] [2021-08-26 05:00:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:03,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:03,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:03,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 05:00:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:00:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:03,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:03,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508759584] [2021-08-26 05:00:03,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:03,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964220379] [2021-08-26 05:00:03,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964220379] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:03,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:03,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:00:03,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490990348] [2021-08-26 05:00:03,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:00:03,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:00:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:00:03,881 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:03,932 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-08-26 05:00:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:00:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-08-26 05:00:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:03,934 INFO L225 Difference]: With dead ends: 44 [2021-08-26 05:00:03,934 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 05:00:03,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 05:00:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-08-26 05:00:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-26 05:00:03,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 7 [2021-08-26 05:00:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:03,941 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-26 05:00:03,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-26 05:00:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 05:00:03,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:03,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:03,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:04,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:04,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash 731943696, now seen corresponding path program 1 times [2021-08-26 05:00:04,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:04,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390023240] [2021-08-26 05:00:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:04,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:04,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:04,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966009182] [2021-08-26 05:00:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:04,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:04,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:04,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 05:00:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:00:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:04,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:04,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390023240] [2021-08-26 05:00:04,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:04,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966009182] [2021-08-26 05:00:04,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966009182] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:04,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:00:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345842699] [2021-08-26 05:00:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:00:04,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:00:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:00:04,334 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:04,387 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-08-26 05:00:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:00:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 [2021-08-26 05:00:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:04,389 INFO L225 Difference]: With dead ends: 41 [2021-08-26 05:00:04,389 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 05:00:04,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 05:00:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-08-26 05:00:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-08-26 05:00:04,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 9 [2021-08-26 05:00:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:04,401 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-08-26 05:00:04,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-08-26 05:00:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 05:00:04,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:04,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:04,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:04,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 05:00:04,626 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash 642019515, now seen corresponding path program 1 times [2021-08-26 05:00:04,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:04,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833361116] [2021-08-26 05:00:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:04,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:04,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:04,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171084591] [2021-08-26 05:00:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:04,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:04,639 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) [2021-08-26 05:00:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 05:00:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:04,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:00:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:04,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833361116] [2021-08-26 05:00:04,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:04,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171084591] [2021-08-26 05:00:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171084591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:04,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:04,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:00:04,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909859168] [2021-08-26 05:00:04,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:00:04,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:00:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:04,827 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-08-26 05:00:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:04,896 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-08-26 05:00:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:00:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) Word has length 14 [2021-08-26 05:00:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:04,897 INFO L225 Difference]: With dead ends: 51 [2021-08-26 05:00:04,897 INFO L226 Difference]: Without dead ends: 47 [2021-08-26 05:00:04,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:00:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-26 05:00:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-08-26 05:00:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-08-26 05:00:04,903 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 14 [2021-08-26 05:00:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:04,904 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-08-26 05:00:04,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-08-26 05:00:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-08-26 05:00:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 05:00:04,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:04,905 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:04,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:05,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:05,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:05,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:05,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1494380834, now seen corresponding path program 1 times [2021-08-26 05:00:05,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:05,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268256244] [2021-08-26 05:00:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:05,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:05,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:05,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325828685] [2021-08-26 05:00:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:05,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:05,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:05,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:05,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 05:00:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:00:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:05,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268256244] [2021-08-26 05:00:05,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325828685] [2021-08-26 05:00:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325828685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:05,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:05,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:00:05,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012044615] [2021-08-26 05:00:05,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:00:05,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:05,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:00:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:05,412 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. 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) [2021-08-26 05:00:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:05,512 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-08-26 05:00:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:00:05,513 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 [2021-08-26 05:00:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:05,515 INFO L225 Difference]: With dead ends: 48 [2021-08-26 05:00:05,515 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 05:00:05,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:00:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 05:00:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-08-26 05:00:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 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) [2021-08-26 05:00:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-08-26 05:00:05,530 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 16 [2021-08-26 05:00:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:05,531 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-08-26 05:00:05,531 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) [2021-08-26 05:00:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-08-26 05:00:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 05:00:05,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:05,532 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-26 05:00:05,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:05,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:05,746 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:05,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1973246547, now seen corresponding path program 2 times [2021-08-26 05:00:05,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:05,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978233197] [2021-08-26 05:00:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:05,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:05,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:05,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141571073] [2021-08-26 05:00:05,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:05,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:05,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:05,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:05,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 05:00:05,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:05,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 05:00:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:06,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:06,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978233197] [2021-08-26 05:00:06,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:06,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141571073] [2021-08-26 05:00:06,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141571073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:06,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:06,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:00:06,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988052465] [2021-08-26 05:00:06,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:00:06,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:06,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:00:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:00:06,138 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:06,264 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-08-26 05:00:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:00:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 05:00:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:06,266 INFO L225 Difference]: With dead ends: 58 [2021-08-26 05:00:06,266 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 05:00:06,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 05:00:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-08-26 05:00:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-08-26 05:00:06,275 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 21 [2021-08-26 05:00:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:06,276 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-08-26 05:00:06,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-08-26 05:00:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 05:00:06,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:06,277 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-08-26 05:00:06,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:06,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:06,501 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:00:06,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:06,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2085769040, now seen corresponding path program 2 times [2021-08-26 05:00:06,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:06,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772917049] [2021-08-26 05:00:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:06,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:06,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:06,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888036778] [2021-08-26 05:00:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:06,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:06,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:06,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:06,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 05:00:06,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 05:00:06,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:00:06,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 05:00:06,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:06,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772917049] [2021-08-26 05:00:06,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:06,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888036778] [2021-08-26 05:00:06,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888036778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:06,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:06,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 05:00:06,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021063278] [2021-08-26 05:00:06,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:00:06,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:00:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:00:06,870 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) 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) [2021-08-26 05:00:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:26,052 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-08-26 05:00:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:00:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) 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 23 [2021-08-26 05:00:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:26,053 INFO L225 Difference]: With dead ends: 48 [2021-08-26 05:00:26,053 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 05:00:26,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 05:00:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 05:00:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:00:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 05:00:26,054 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-08-26 05:00:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:26,054 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 05:00:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) 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) [2021-08-26 05:00:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 05:00:26,055 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 05:00:26,056 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:26,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:26,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:26,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:26,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:26,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:26,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:26,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:26,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 05:00:26,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 05:00:26,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 05:00:26,544 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-08-26 05:00:26,544 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (= ULTIMATE.start_main_~s~0 (let ((.cse0 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) [2021-08-26 05:00:26,544 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-08-26 05:00:26,544 INFO L853 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (= ULTIMATE.start_main_~s~0 (let ((.cse0 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) [2021-08-26 05:00:26,544 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-08-26 05:00:26,544 INFO L853 garLoopResultBuilder]: At program point L12-8(lines 35 36) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (= ULTIMATE.start_main_~s~0 (let ((.cse0 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) [2021-08-26 05:00:26,544 INFO L857 garLoopResultBuilder]: For program point L12-9(lines 12 15) no Hoare annotation was computed. [2021-08-26 05:00:26,544 INFO L853 garLoopResultBuilder]: At program point L12-11(lines 11 17) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1))) (.cse1 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)))) (or (and (= ULTIMATE.start_main_~a~0 1) .cse0 .cse1 (= ULTIMATE.start_main_~s~0 4)) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 (= ULTIMATE.start_main_~s~0 (let ((.cse2 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse2) (* .cse2 .cse2) 1)))) (and (= ULTIMATE.start_main_~t~0 1) .cse0 (= ULTIMATE.start_main_~s~0 1) .cse1))) [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point L12-12(lines 12 15) no Hoare annotation was computed. [2021-08-26 05:00:26,545 INFO L853 garLoopResultBuilder]: At program point L12-14(lines 11 17) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1))) (.cse2 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 (= ULTIMATE.start_main_~s~0 (let ((.cse1 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse1) (* .cse1 .cse1) 1)))) (and (= ULTIMATE.start_main_~t~0 1) .cse0 (= ULTIMATE.start_main_~s~0 1) .cse2) (and (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 1)) (= ULTIMATE.start_main_~t~0 3) .cse0 .cse2))) [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point L12-15(lines 12 15) no Hoare annotation was computed. [2021-08-26 05:00:26,545 INFO L853 garLoopResultBuilder]: At program point L29-2(lines 29 41) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1))) (.cse1 (= ULTIMATE.start_main_~s~0 (let ((.cse2 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse2) (* .cse2 .cse2) 1))))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1) (and (= ULTIMATE.start_main_~t~0 1) .cse0 .cse1))) [2021-08-26 05:00:26,545 INFO L853 garLoopResultBuilder]: At program point L12-17(lines 11 17) the Hoare annotation is: (and (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point L29-3(lines 29 41) no Hoare annotation was computed. [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-08-26 05:00:26,545 INFO L857 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-08-26 05:00:26,546 INFO L857 garLoopResultBuilder]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-08-26 05:00:26,546 INFO L857 garLoopResultBuilder]: For program point L13-3(lines 13 14) no Hoare annotation was computed. [2021-08-26 05:00:26,546 INFO L857 garLoopResultBuilder]: For program point L13-4(lines 13 14) no Hoare annotation was computed. [2021-08-26 05:00:26,546 INFO L857 garLoopResultBuilder]: For program point L13-5(lines 13 14) no Hoare annotation was computed. [2021-08-26 05:00:26,546 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 05:00:26,546 INFO L853 garLoopResultBuilder]: At program point L47(lines 20 48) the Hoare annotation is: (and (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) [2021-08-26 05:00:26,549 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 05:00:26,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:00:26 BoogieIcfgContainer [2021-08-26 05:00:26,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 05:00:26,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 05:00:26,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 05:00:26,567 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 05:00:26,567 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:00:03" (3/4) ... [2021-08-26 05:00:26,570 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 05:00:26,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-26 05:00:26,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 05:00:26,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 05:00:26,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 05:00:26,604 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 05:00:26,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 05:00:26,606 INFO L168 Benchmark]: Toolchain (without parser) took 23974.46 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 34.6 MB in the beginning and 45.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:26,606 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:00:26,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.93 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 24.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:26,607 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.48 ms. Allocated memory is still 56.6 MB. Free memory was 24.8 MB in the beginning and 39.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:26,607 INFO L168 Benchmark]: Boogie Preprocessor took 35.87 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 38.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:00:26,607 INFO L168 Benchmark]: RCFGBuilder took 301.54 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 23.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:26,608 INFO L168 Benchmark]: TraceAbstraction took 23368.53 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 51.1 MB in the beginning and 48.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:26,608 INFO L168 Benchmark]: Witness Printer took 37.79 ms. Allocated memory is still 83.9 MB. Free memory was 48.0 MB in the beginning and 45.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:26,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 154.93 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 24.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.48 ms. Allocated memory is still 56.6 MB. Free memory was 24.8 MB in the beginning and 39.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.87 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 38.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 301.54 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 23.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23368.53 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 51.1 MB in the beginning and 48.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. * Witness Printer took 37.79 ms. Allocated memory is still 83.9 MB. Free memory was 48.0 MB in the beginning and 45.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 23271.4ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 11.1ms, AutomataDifference: 19713.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 284.3ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 88 SDtfs, 127 SDslu, 157 SDs, 0 SdLazy, 309 SolverSat, 81 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 19327.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 298.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 21 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 33 NumberOfFragments, 374 HoareAnnotationTreeSize, 8 FomulaSimplifications, 1151 FormulaSimplificationTreeSizeReduction, 62.3ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 216.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 41.2ms SsaConstructionTime, 141.9ms SatisfiabilityAnalysisTime, 1131.8ms InterpolantComputationTime, 95 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 636 SizeOfPredicates, 26 NumberOfNonLiveVariables, 421 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 19/44 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: t == 2 * a + 1 && !(0 == cond) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((a == 1 && t == 2 * a + 1) && !(0 == cond)) && s == 4) || ((1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1)) || (((t == 1 && t == 2 * a + 1) && s == 1) && !(0 == cond)) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1) || (((t == 1 && t == 2 * a + 1) && s == 1) && !(0 == cond))) || (((s == t + 1 && t == 3) && t == 2 * a + 1) && !(0 == cond)) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: t == 2 * a + 1 && !(0 == cond) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1) || ((t == 1 && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1) RESULT: Ultimate proved your program to be correct! [2021-08-26 05:00:26,630 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...