./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/trex02-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/trex02-1.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 ba176e8a5492e3864a1c4f794c773bd5c3a3465f ........................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:55:57,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:57,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:57,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:57,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:57,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:57,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:57,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:57,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:57,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:57,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:57,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:57,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:57,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:57,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:57,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:57,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:57,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:57,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:57,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:57,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:57,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:57,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:57,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:57,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:57,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:57,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:57,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:57,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:57,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:57,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:57,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:57,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:57,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:57,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:57,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:57,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:57,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:57,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:57,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:57,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:57,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:57,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:57,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:57,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:57,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:57,286 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:57,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:57,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:57,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:57,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:57,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:57,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:57,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:57,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:57,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:57,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:57,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:57,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:57,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:57,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:57,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:57,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:57,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:57,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:57,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:57,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:57,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:57,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:57,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:57,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:57,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> ba176e8a5492e3864a1c4f794c773bd5c3a3465f [2020-10-20 00:55:57,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:57,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:57,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:57,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:57,537 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:57,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/trex02-1.c [2020-10-20 00:55:57,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f222661f/23560374186d497da4222b45875b8ba0/FLAGd23d3dde1 [2020-10-20 00:55:58,063 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:58,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/trex02-1.c [2020-10-20 00:55:58,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f222661f/23560374186d497da4222b45875b8ba0/FLAGd23d3dde1 [2020-10-20 00:55:58,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f222661f/23560374186d497da4222b45875b8ba0 [2020-10-20 00:55:58,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:58,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:58,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:58,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:58,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:58,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8bc88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58, skipping insertion in model container [2020-10-20 00:55:58,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:58,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:58,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:58,725 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:58,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:58,758 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:58,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58 WrapperNode [2020-10-20 00:55:58,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:58,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:58,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:58,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:58,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:58,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:58,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:58,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:58,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... [2020-10-20 00:55:58,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:58,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:58,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:58,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:58,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:58,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:58,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:58,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:58,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:59,072 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:59,072 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 00:55:59,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:59 BoogieIcfgContainer [2020-10-20 00:55:59,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:59,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:59,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:59,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:59,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:58" (1/3) ... [2020-10-20 00:55:59,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dd0d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:59, skipping insertion in model container [2020-10-20 00:55:59,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:58" (2/3) ... [2020-10-20 00:55:59,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dd0d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:59, skipping insertion in model container [2020-10-20 00:55:59,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:59" (3/3) ... [2020-10-20 00:55:59,082 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2020-10-20 00:55:59,093 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:59,100 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:59,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:59,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:59,135 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:59,135 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:59,135 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:59,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:59,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:59,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:59,136 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:55:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:55:59,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:59,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:55:59,167 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2020-10-20 00:55:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:59,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317623983] [2020-10-20 00:55:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317623983] [2020-10-20 00:55:59,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:59,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:55:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818195026] [2020-10-20 00:55:59,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:59,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:59,316 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:55:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:59,330 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-10-20 00:55:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:59,332 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:55:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:59,341 INFO L225 Difference]: With dead ends: 19 [2020-10-20 00:55:59,341 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:55:59,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:55:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:55:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:55:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-10-20 00:55:59,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-10-20 00:55:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:59,381 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-20 00:55:59,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-10-20 00:55:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:55:59,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:59,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:55:59,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:59,383 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 889641779, now seen corresponding path program 1 times [2020-10-20 00:55:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:59,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439330946] [2020-10-20 00:55:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:59,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439330946] [2020-10-20 00:55:59,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:59,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:55:59,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033851615] [2020-10-20 00:55:59,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:59,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:59,480 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-10-20 00:55:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:59,673 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-10-20 00:55:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:59,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-20 00:55:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:59,674 INFO L225 Difference]: With dead ends: 8 [2020-10-20 00:55:59,674 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:55:59,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:55:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:55:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:55:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:55:59,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-10-20 00:55:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:59,678 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:55:59,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:55:59,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:55:59,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:55:59,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:55:59,700 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:55:59,701 INFO L274 CegarLoopResult]: For program point L25(lines 25 26) no Hoare annotation was computed. [2020-10-20 00:55:59,701 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 27) no Hoare annotation was computed. [2020-10-20 00:55:59,701 INFO L277 CegarLoopResult]: At program point L17-1(lines 17 27) the Hoare annotation is: true [2020-10-20 00:55:59,701 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-20 00:55:59,701 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:55:59,701 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:55:59,702 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:55:59,702 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:55:59,702 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:55:59,702 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-20 00:55:59,702 INFO L277 CegarLoopResult]: At program point L6-2(lines 1 32) the Hoare annotation is: true [2020-10-20 00:55:59,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:59 BoogieIcfgContainer [2020-10-20 00:55:59,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:59,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:59,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:59,716 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:59,718 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:59" (3/4) ... [2020-10-20 00:55:59,725 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:55:59,751 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:55:59,752 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:55:59,752 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:55:59,752 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:55:59,801 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:59,801 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:59,804 INFO L168 Benchmark]: Toolchain (without parser) took 1300.63 ms. Allocated memory was 38.3 MB in the beginning and 41.4 MB in the end (delta: 3.1 MB). Free memory was 15.8 MB in the beginning and 10.3 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,805 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 30.4 MB. Free memory was 16.6 MB in the beginning and 16.6 MB in the end (delta: 32.8 kB). Peak memory consumption was 32.8 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.92 ms. Allocated memory was 38.3 MB in the beginning and 39.3 MB in the end (delta: 1.0 MB). Free memory was 14.9 MB in the beginning and 15.2 MB in the end (delta: -300.7 kB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.96 ms. Allocated memory is still 39.3 MB. Free memory was 15.1 MB in the beginning and 13.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,807 INFO L168 Benchmark]: Boogie Preprocessor took 20.13 ms. Allocated memory is still 39.3 MB. Free memory was 13.5 MB in the beginning and 12.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,808 INFO L168 Benchmark]: RCFGBuilder took 259.86 ms. Allocated memory was 39.3 MB in the beginning and 40.4 MB in the end (delta: 1.0 MB). Free memory was 12.2 MB in the beginning and 14.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,808 INFO L168 Benchmark]: TraceAbstraction took 639.69 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 14.5 MB in the beginning and 13.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,809 INFO L168 Benchmark]: Witness Printer took 86.29 ms. Allocated memory is still 41.4 MB. Free memory was 13.2 MB in the beginning and 10.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:59,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 30.4 MB. Free memory was 16.6 MB in the beginning and 16.6 MB in the end (delta: 32.8 kB). Peak memory consumption was 32.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 248.92 ms. Allocated memory was 38.3 MB in the beginning and 39.3 MB in the end (delta: 1.0 MB). Free memory was 14.9 MB in the beginning and 15.2 MB in the end (delta: -300.7 kB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 33.96 ms. Allocated memory is still 39.3 MB. Free memory was 15.1 MB in the beginning and 13.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 20.13 ms. Allocated memory is still 39.3 MB. Free memory was 13.5 MB in the beginning and 12.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 259.86 ms. Allocated memory was 39.3 MB in the beginning and 40.4 MB in the end (delta: 1.0 MB). Free memory was 12.2 MB in the beginning and 14.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 639.69 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 14.5 MB in the beginning and 13.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. * Witness Printer took 86.29 ms. Allocated memory is still 41.4 MB. Free memory was 13.2 MB in the beginning and 10.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 3 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 75 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...