./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/afnp2014.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/loop-lit/afnp2014.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 47b2b831be7ca2da97cc2b93acc9fcef98786cfa ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 10:59:56,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:59:56,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:59:56,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:59:56,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:59:56,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:59:56,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:59:56,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:59:56,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:59:56,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:59:56,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:59:56,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:59:56,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:59:56,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:59:56,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:59:56,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:59:56,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:59:56,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:59:56,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:59:56,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:59:56,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:59:56,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:59:56,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:59:56,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:59:56,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:59:56,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:59:56,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:59:56,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:59:56,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:59:56,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:59:56,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:59:56,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:59:56,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:59:56,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:59:56,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:59:56,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:59:56,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:59:56,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:59:56,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:59:56,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:59:56,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:59:56,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:59:56,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:59:56,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:59:56,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:59:56,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:59:56,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:59:56,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:59:56,601 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:59:56,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:59:56,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:59:56,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:59:56,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:59:56,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:59:56,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:59:56,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:59:56,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:59:56,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:59:56,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:59:56,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:59:56,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:59:56,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:59:56,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:59:56,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:59:56,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:59:56,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:59:56,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47b2b831be7ca2da97cc2b93acc9fcef98786cfa [2021-08-29 10:59:56,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:59:56,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:59:57,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:59:57,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:59:57,003 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:59:57,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/afnp2014.i [2021-08-29 10:59:57,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20df8d602/21edbfb9431e4f38915586ccb077124e/FLAGca1317ce9 [2021-08-29 10:59:57,421 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:59:57,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/afnp2014.i [2021-08-29 10:59:57,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20df8d602/21edbfb9431e4f38915586ccb077124e/FLAGca1317ce9 [2021-08-29 10:59:57,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20df8d602/21edbfb9431e4f38915586ccb077124e [2021-08-29 10:59:57,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:59:57,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:59:57,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:59:57,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:59:57,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:59:57,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:59:57" (1/1) ... [2021-08-29 10:59:57,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa0e391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:57, skipping insertion in model container [2021-08-29 10:59:57,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:59:57" (1/1) ... [2021-08-29 10:59:57,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:59:57,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:59:58,063 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/loop-lit/afnp2014.i[895,908] [2021-08-29 10:59:58,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:59:58,106 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:59:58,115 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/loop-lit/afnp2014.i[895,908] [2021-08-29 10:59:58,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:59:58,161 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:59:58,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58 WrapperNode [2021-08-29 10:59:58,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:59:58,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:59:58,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:59:58,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:59:58,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:59:58,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:59:58,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:59:58,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:59:58,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:59:58,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:59:58,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:59:58,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:59:58,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (1/1) ... [2021-08-29 10:59:58,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:59:58,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:59:58,258 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) [2021-08-29 10:59:58,272 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 [2021-08-29 10:59:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:59:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:59:58,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:59:58,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:59:58,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:59:58,371 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 10:59:58,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:59:58 BoogieIcfgContainer [2021-08-29 10:59:58,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:59:58,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:59:58,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:59:58,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:59:58,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:59:57" (1/3) ... [2021-08-29 10:59:58,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b5697d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:59:58, skipping insertion in model container [2021-08-29 10:59:58,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:59:58" (2/3) ... [2021-08-29 10:59:58,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b5697d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:59:58, skipping insertion in model container [2021-08-29 10:59:58,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:59:58" (3/3) ... [2021-08-29 10:59:58,377 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2021-08-29 10:59:58,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:59:58,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:59:58,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:59:58,416 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 [2021-08-29 10:59:58,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:59:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:59:58,429 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:59:58,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:59:58,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:59:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:59:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-08-29 10:59:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:59:58,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661626521] [2021-08-29 10:59:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:58,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:59:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:58,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:59:58,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661626521] [2021-08-29 10:59:58,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661626521] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:59:58,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:59:58,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 10:59:58,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680471066] [2021-08-29 10:59:58,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 10:59:58,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:59:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 10:59:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:59:58,578 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:58,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:59:58,639 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-29 10:59:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 10:59:58,640 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 10:59:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:59:58,645 INFO L225 Difference]: With dead ends: 21 [2021-08-29 10:59:58,645 INFO L226 Difference]: Without dead ends: 9 [2021-08-29 10:59:58,647 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:59:58,649 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.87ms IncrementalHoareTripleChecker+Time [2021-08-29 10:59:58,649 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 0.16ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 51.87ms Time] [2021-08-29 10:59:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-29 10:59:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-29 10:59:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-29 10:59:58,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-29 10:59:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:59:58,687 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-29 10:59:58,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:58,700 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-29 10:59:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 10:59:58,701 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:59:58,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:59:58,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:59:58,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:59:58,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:59:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash 177690766, now seen corresponding path program 1 times [2021-08-29 10:59:58,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:59:58,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163526874] [2021-08-29 10:59:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:58,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:59:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:58,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:59:58,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163526874] [2021-08-29 10:59:58,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163526874] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:59:58,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:59:58,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:59:58,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128928254] [2021-08-29 10:59:58,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:59:58,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:59:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:59:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:59:58,804 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-29 10:59:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:59:58,842 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-08-29 10:59:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 10:59:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-29 10:59:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:59:58,843 INFO L225 Difference]: With dead ends: 16 [2021-08-29 10:59:58,844 INFO L226 Difference]: Without dead ends: 12 [2021-08-29 10:59:58,848 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.00ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 10:59:58,850 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.93ms IncrementalHoareTripleChecker+Time [2021-08-29 10:59:58,850 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 24.93ms Time] [2021-08-29 10:59:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-29 10:59:58,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-29 10:59:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-29 10:59:58,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2021-08-29 10:59:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:59:58,855 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-29 10:59:58,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-29 10:59:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-08-29 10:59:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 10:59:58,857 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:59:58,857 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:59:58,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:59:58,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:59:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:59:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash -777654537, now seen corresponding path program 1 times [2021-08-29 10:59:58,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:59:58,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270587784] [2021-08-29 10:59:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:58,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:59:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:58,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:59:58,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270587784] [2021-08-29 10:59:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270587784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:59:58,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452827442] [2021-08-29 10:59:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:58,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:59:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:59:58,957 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) [2021-08-29 10:59:58,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 10:59:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 10:59:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:59:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:59,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:59:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452827442] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:59:59,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:59:59,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-08-29 10:59:59,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799957934] [2021-08-29 10:59:59,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 10:59:59,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:59:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 10:59:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-29 10:59:59,214 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:59:59,260 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-08-29 10:59:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 10:59:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 10:59:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:59:59,261 INFO L225 Difference]: With dead ends: 19 [2021-08-29 10:59:59,262 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 10:59:59,262 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.64ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:59:59,263 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.56ms IncrementalHoareTripleChecker+Time [2021-08-29 10:59:59,265 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.36ms Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 33.56ms Time] [2021-08-29 10:59:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 10:59:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 10:59:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-08-29 10:59:59,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-08-29 10:59:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:59:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-08-29 10:59:59,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:59:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-08-29 10:59:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 10:59:59,270 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:59:59,270 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-08-29 10:59:59,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 10:59:59,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:59:59,487 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:59:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:59:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1278694382, now seen corresponding path program 2 times [2021-08-29 10:59:59,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:59:59,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221600341] [2021-08-29 10:59:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:59,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:59:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:59,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:59:59,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221600341] [2021-08-29 10:59:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221600341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:59:59,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884016905] [2021-08-29 10:59:59,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:59:59,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:59:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:59:59,625 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) [2021-08-29 10:59:59,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 10:59:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:59:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:59:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 10:59:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:59:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:59,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:59:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884016905] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:59:59,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:59:59,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-08-29 10:59:59,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517669622] [2021-08-29 10:59:59,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 10:59:59,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:59:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 10:59:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:59:59,874 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-08-29 10:59:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:59:59,921 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-08-29 10:59:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 10:59:59,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 [2021-08-29 10:59:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:59:59,922 INFO L225 Difference]: With dead ends: 15 [2021-08-29 10:59:59,922 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 10:59:59,922 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.86ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:59:59,923 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.82ms IncrementalHoareTripleChecker+Time [2021-08-29 10:59:59,926 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 16.82ms Time] [2021-08-29 10:59:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 10:59:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 10:59:59,928 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) [2021-08-29 10:59:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 10:59:59,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-08-29 10:59:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:59:59,928 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 10:59:59,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-08-29 10:59:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 10:59:59,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 10:59:59,939 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:59:59,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 11:00:00,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-29 11:00:00,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:00:00,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:00:00,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:00:00,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:00:00,180 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:00:00,180 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-08-29 11:00:00,180 INFO L858 garLoopResultBuilder]: For program point L27-3(lines 27 30) no Hoare annotation was computed. [2021-08-29 11:00:00,180 INFO L854 garLoopResultBuilder]: At program point L27-5(lines 27 30) the Hoare annotation is: (and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~y~0) (<= 1 ULTIMATE.start_main_~x~0)) [2021-08-29 11:00:00,180 INFO L858 garLoopResultBuilder]: For program point L27-6(lines 27 30) no Hoare annotation was computed. [2021-08-29 11:00:00,180 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-29 11:00:00,180 INFO L861 garLoopResultBuilder]: At program point L32(lines 24 33) the Hoare annotation is: true [2021-08-29 11:00:00,181 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:00:00,181 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:00:00,181 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:00:00,181 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 11:00:00,181 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-29 11:00:00,181 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-08-29 11:00:00,184 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:00:00,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:00:00 BoogieIcfgContainer [2021-08-29 11:00:00,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:00:00,192 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:00:00,192 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:00:00,192 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:00:00,192 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:59:58" (3/4) ... [2021-08-29 11:00:00,194 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:00:00,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 11:00:00,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:00:00,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:00:00,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:00:00,215 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:00:00,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:00:00,216 INFO L158 Benchmark]: Toolchain (without parser) took 2331.98ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 44.1MB in the beginning and 53.6MB in the end (delta: -9.5MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2021-08-29 11:00:00,216 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 45.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:00:00,216 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.39ms. Allocated memory is still 62.9MB. Free memory was 43.9MB in the beginning and 47.3MB in the end (delta: -3.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 11:00:00,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.44ms. Allocated memory is still 62.9MB. Free memory was 47.3MB in the beginning and 45.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:00:00,217 INFO L158 Benchmark]: Boogie Preprocessor took 23.26ms. Allocated memory is still 62.9MB. Free memory was 45.9MB in the beginning and 44.9MB in the end (delta: 990.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:00:00,217 INFO L158 Benchmark]: RCFGBuilder took 152.38ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 37.1MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:00:00,217 INFO L158 Benchmark]: TraceAbstraction took 1817.95ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 36.6MB in the beginning and 55.7MB in the end (delta: -19.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:00:00,217 INFO L158 Benchmark]: Witness Printer took 23.86ms. Allocated memory is still 77.6MB. Free memory was 55.7MB in the beginning and 53.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:00:00,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 45.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.39ms. Allocated memory is still 62.9MB. Free memory was 43.9MB in the beginning and 47.3MB in the end (delta: -3.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.44ms. Allocated memory is still 62.9MB. Free memory was 47.3MB in the beginning and 45.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.26ms. Allocated memory is still 62.9MB. Free memory was 45.9MB in the beginning and 44.9MB in the end (delta: 990.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 152.38ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 37.1MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1817.95ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 36.6MB in the beginning and 55.7MB in the end (delta: -19.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 23.86ms. Allocated memory is still 77.6MB. Free memory was 55.7MB in the beginning and 53.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: 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, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1772.95ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 8.28ms, AutomataDifference: 251.75ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 23.25ms, InitialAbstractionConstructionTime: 6.27ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 127.18ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 106.84ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 106 IncrementalHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 0 mSDtfsCounter, 106 mSolverCounterSat, 2.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.51ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 34.71ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 12 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 10.12ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 9.29ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 26.86ms SsaConstructionTime, 112.40ms SatisfiabilityAnalysisTime, 629.21ms InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 238 SizeOfPredicates, 6 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (y <= x && 0 <= y) && 1 <= x RESULT: Ultimate proved your program to be correct! [2021-08-29 11:00:00,257 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...