./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_24-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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/array-examples/sanfoundry_24-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccb5d8d533f248ce9cbf3b135241b499fec47cdc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 11:51:56,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-04 11:51:56,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-04 11:51:56,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-04 11:51:56,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-04 11:51:56,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-04 11:51:56,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-04 11:51:56,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-04 11:51:56,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-04 11:51:56,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-04 11:51:56,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-04 11:51:56,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-04 11:51:56,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-04 11:51:56,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-04 11:51:56,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-04 11:51:56,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-04 11:51:56,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-04 11:51:56,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-04 11:51:56,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-04 11:51:56,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-04 11:51:56,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-04 11:51:56,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-04 11:51:56,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-04 11:51:56,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-04 11:51:56,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-04 11:51:56,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-04 11:51:56,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-04 11:51:56,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-04 11:51:56,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-04 11:51:56,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-04 11:51:56,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 11:51:56,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 11:51:56,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 11:51:56,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 11:51:56,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 11:51:56,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 11:51:56,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 11:51:56,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 11:51:56,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 11:51:56,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 11:51:56,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 11:51:56,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-04 11:51:56,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 11:51:56,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 11:51:56,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 11:51:56,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 11:51:56,597 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 11:51:56,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 11:51:56,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 11:51:56,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-04 11:51:56,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 11:51:56,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 11:51:56,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 11:51:56,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 11:51:56,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 11:51:56,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 11:51:56,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 11:51:56,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 11:51:56,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 11:51:56,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 11:51:56,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 11:51:56,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 11:51:56,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 11:51:56,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 11:51:56,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 11:51:56,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 11:51:56,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-04 11:51:56,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-04 11:51:56,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 11:51:56,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 11:51:56,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccb5d8d533f248ce9cbf3b135241b499fec47cdc [2021-07-04 11:51:56,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 11:51:57,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 11:51:57,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 11:51:57,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 11:51:57,126 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 11:51:57,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_24-1.i [2021-07-04 11:51:57,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55312fc0b/e8e147c41f5c49988d2e7292ba5a98a9/FLAG43359ddba [2021-07-04 11:51:57,603 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 11:51:57,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-1.i [2021-07-04 11:51:57,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55312fc0b/e8e147c41f5c49988d2e7292ba5a98a9/FLAG43359ddba [2021-07-04 11:51:57,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55312fc0b/e8e147c41f5c49988d2e7292ba5a98a9 [2021-07-04 11:51:57,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 11:51:57,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 11:51:57,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 11:51:57,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 11:51:57,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 11:51:57,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 11:51:57" (1/1) ... [2021-07-04 11:51:57,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13384758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:57, skipping insertion in model container [2021-07-04 11:51:57,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 11:51:57" (1/1) ... [2021-07-04 11:51:58,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 11:51:58,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 11:51:58,081 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-1.i[848,861] [2021-07-04 11:51:58,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 11:51:58,094 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 11:51:58,102 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-1.i[848,861] [2021-07-04 11:51:58,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 11:51:58,115 INFO L208 MainTranslator]: Completed translation [2021-07-04 11:51:58,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58 WrapperNode [2021-07-04 11:51:58,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 11:51:58,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 11:51:58,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 11:51:58,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 11:51:58,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 11:51:58,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 11:51:58,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 11:51:58,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 11:51:58,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 11:51:58,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 11:51:58,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 11:51:58,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 11:51:58,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (1/1) ... [2021-07-04 11:51:58,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 11:51:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 11:51:58,216 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) [2021-07-04 11:51:58,224 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 [2021-07-04 11:51:58,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-04 11:51:58,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 11:51:58,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-04 11:51:58,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 11:51:58,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 11:51:58,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-04 11:51:58,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-04 11:51:58,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 11:51:58,514 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-07-04 11:51:58,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:51:58 BoogieIcfgContainer [2021-07-04 11:51:58,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 11:51:58,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 11:51:58,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 11:51:58,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 11:51:58,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 11:51:57" (1/3) ... [2021-07-04 11:51:58,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc37bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 11:51:58, skipping insertion in model container [2021-07-04 11:51:58,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:51:58" (2/3) ... [2021-07-04 11:51:58,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc37bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 11:51:58, skipping insertion in model container [2021-07-04 11:51:58,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:51:58" (3/3) ... [2021-07-04 11:51:58,521 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2021-07-04 11:51:58,528 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 11:51:58,529 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-04 11:51:58,572 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 11:51:58,579 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 11:51:58,579 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 11:51:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 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) [2021-07-04 11:51:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-07-04 11:51:58,611 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 11:51:58,611 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 11:51:58,612 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 11:51:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 11:51:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash 212104336, now seen corresponding path program 1 times [2021-07-04 11:51:58,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 11:51:58,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088379502] [2021-07-04 11:51:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 11:51:58,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 11:51:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 11:51:58,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:58,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:58,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:58,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 11:51:58,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:58,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 11:51:58,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:58,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-04 11:51:58,817 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-04 11:51:58,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:58,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:58,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 11:51:58,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 11:51:58,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088379502] [2021-07-04 11:51:58,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088379502] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 11:51:58,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 11:51:58,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-04 11:51:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195255823] [2021-07-04 11:51:58,829 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-04 11:51:58,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 11:51:58,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-04 11:51:58,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-04 11:51:58,845 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-07-04 11:51:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 11:51:58,952 INFO L93 Difference]: Finished difference Result 68 states and 97 transitions. [2021-07-04 11:51:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-04 11:51:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2021-07-04 11:51:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 11:51:58,959 INFO L225 Difference]: With dead ends: 68 [2021-07-04 11:51:58,959 INFO L226 Difference]: Without dead ends: 21 [2021-07-04 11:51:58,962 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-04 11:51:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-07-04 11:51:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2021-07-04 11:51:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-07-04 11:51:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-07-04 11:51:58,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-07-04 11:51:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 11:51:58,982 INFO L442 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-07-04 11:51:58,982 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-07-04 11:51:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-07-04 11:51:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-04 11:51:58,983 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 11:51:58,983 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 11:51:58,983 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-04 11:51:58,984 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 11:51:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 11:51:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1436002194, now seen corresponding path program 1 times [2021-07-04 11:51:58,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 11:51:58,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631814763] [2021-07-04 11:51:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 11:51:58,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 11:51:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 11:51:59,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,036 INFO L142 QuantifierPusher]: treesize reduction 28, result has 55.6 percent of original size [2021-07-04 11:51:59,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-07-04 11:51:59,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 11:51:59,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-04 11:51:59,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 11:51:59,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631814763] [2021-07-04 11:51:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631814763] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 11:51:59,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 11:51:59,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-04 11:51:59,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594125520] [2021-07-04 11:51:59,064 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-04 11:51:59,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 11:51:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-04 11:51:59,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-04 11:51:59,065 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-07-04 11:51:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 11:51:59,121 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-07-04 11:51:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-04 11:51:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) Word has length 10 [2021-07-04 11:51:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 11:51:59,122 INFO L225 Difference]: With dead ends: 16 [2021-07-04 11:51:59,122 INFO L226 Difference]: Without dead ends: 0 [2021-07-04 11:51:59,123 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-04 11:51:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-04 11:51:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-04 11:51:59,124 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) [2021-07-04 11:51:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-04 11:51:59,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-07-04 11:51:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 11:51:59,126 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-04 11:51:59,127 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-07-04 11:51:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-04 11:51:59,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-04 11:51:59,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-04 11:51:59,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,151 INFO L762 garLoopResultBuilder]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2021-07-04 11:51:59,151 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,151 INFO L765 garLoopResultBuilder]: At program point L27-3(lines 27 30) the Hoare annotation is: true [2021-07-04 11:51:59,151 INFO L762 garLoopResultBuilder]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2021-07-04 11:51:59,152 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,152 INFO L762 garLoopResultBuilder]: For program point L32-2(lines 32 38) no Hoare annotation was computed. [2021-07-04 11:51:59,152 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,152 INFO L765 garLoopResultBuilder]: At program point L32-3(lines 32 38) the Hoare annotation is: true [2021-07-04 11:51:59,152 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,153 INFO L762 garLoopResultBuilder]: For program point L32-4(lines 32 38) no Hoare annotation was computed. [2021-07-04 11:51:59,153 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,153 INFO L762 garLoopResultBuilder]: For program point L41(lines 41 44) no Hoare annotation was computed. [2021-07-04 11:51:59,153 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,154 INFO L765 garLoopResultBuilder]: At program point L46(lines 21 47) the Hoare annotation is: true [2021-07-04 11:51:59,154 INFO L762 garLoopResultBuilder]: For program point L34(lines 34 37) no Hoare annotation was computed. [2021-07-04 11:51:59,154 INFO L762 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,154 INFO L762 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,154 INFO L762 garLoopResultBuilder]: For program point L14-3(lines 1 47) no Hoare annotation was computed. [2021-07-04 11:51:59,154 INFO L762 garLoopResultBuilder]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,155 INFO L762 garLoopResultBuilder]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,155 INFO L762 garLoopResultBuilder]: For program point L14-7(lines 1 47) no Hoare annotation was computed. [2021-07-04 11:51:59,155 INFO L762 garLoopResultBuilder]: For program point L39-2(lines 39 45) no Hoare annotation was computed. [2021-07-04 11:51:59,156 INFO L765 garLoopResultBuilder]: At program point L39-3(lines 39 45) the Hoare annotation is: true [2021-07-04 11:51:59,157 INFO L762 garLoopResultBuilder]: For program point L39-4(lines 39 45) no Hoare annotation was computed. [2021-07-04 11:51:59,158 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-04 11:51:59,158 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 11:51:59,160 INFO L303 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION was SAFE (1/2) [2021-07-04 11:51:59,168 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 11:51:59,170 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 11:51:59,170 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 11:51:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 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) [2021-07-04 11:51:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-04 11:51:59,173 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 11:51:59,173 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 11:51:59,173 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 11:51:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 11:51:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1929833512, now seen corresponding path program 1 times [2021-07-04 11:51:59,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 11:51:59,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066861007] [2021-07-04 11:51:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 11:51:59,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 11:51:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 11:51:59,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 11:51:59,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 11:51:59,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-04 11:51:59,248 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-04 11:51:59,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 11:51:59,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 11:51:59,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066861007] [2021-07-04 11:51:59,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066861007] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 11:51:59,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 11:51:59,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-04 11:51:59,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634663888] [2021-07-04 11:51:59,251 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-04 11:51:59,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 11:51:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-04 11:51:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-04 11:51:59,255 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-07-04 11:51:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 11:51:59,345 INFO L93 Difference]: Finished difference Result 68 states and 97 transitions. [2021-07-04 11:51:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-04 11:51:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) Word has length 10 [2021-07-04 11:51:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 11:51:59,346 INFO L225 Difference]: With dead ends: 68 [2021-07-04 11:51:59,346 INFO L226 Difference]: Without dead ends: 32 [2021-07-04 11:51:59,347 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-04 11:51:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-04 11:51:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2021-07-04 11:51:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-07-04 11:51:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-07-04 11:51:59,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2021-07-04 11:51:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 11:51:59,353 INFO L442 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-07-04 11:51:59,353 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-07-04 11:51:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-07-04 11:51:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-04 11:51:59,354 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 11:51:59,354 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 11:51:59,354 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-04 11:51:59,354 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 11:51:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 11:51:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 906460810, now seen corresponding path program 1 times [2021-07-04 11:51:59,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 11:51:59,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432670811] [2021-07-04 11:51:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 11:51:59,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 11:51:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 11:51:59,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-04 11:51:59,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 11:51:59,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 11:51:59,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 11:51:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-04 11:51:59,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 11:51:59,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432670811] [2021-07-04 11:51:59,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432670811] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 11:51:59,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 11:51:59,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-04 11:51:59,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146311452] [2021-07-04 11:51:59,420 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-04 11:51:59,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 11:51:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-04 11:51:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-04 11:51:59,421 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-07-04 11:51:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 11:51:59,490 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-07-04 11:51:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-04 11:51:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-04 11:51:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 11:51:59,490 INFO L225 Difference]: With dead ends: 27 [2021-07-04 11:51:59,490 INFO L226 Difference]: Without dead ends: 0 [2021-07-04 11:51:59,491 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-04 11:51:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-04 11:51:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-04 11:51:59,491 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) [2021-07-04 11:51:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-04 11:51:59,491 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-07-04 11:51:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 11:51:59,491 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-04 11:51:59,491 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-07-04 11:51:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-04 11:51:59,491 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-04 11:51:59,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-04 11:51:59,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 11:51:59,504 INFO L762 garLoopResultBuilder]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2021-07-04 11:51:59,504 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,504 INFO L765 garLoopResultBuilder]: At program point L27-3(lines 27 30) the Hoare annotation is: true [2021-07-04 11:51:59,504 INFO L762 garLoopResultBuilder]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2021-07-04 11:51:59,505 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,505 INFO L762 garLoopResultBuilder]: For program point L32-2(lines 32 38) no Hoare annotation was computed. [2021-07-04 11:51:59,505 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,505 INFO L765 garLoopResultBuilder]: At program point L32-3(lines 32 38) the Hoare annotation is: true [2021-07-04 11:51:59,505 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,505 INFO L762 garLoopResultBuilder]: For program point L32-4(lines 32 38) no Hoare annotation was computed. [2021-07-04 11:51:59,505 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,506 INFO L762 garLoopResultBuilder]: For program point L41(lines 41 44) no Hoare annotation was computed. [2021-07-04 11:51:59,506 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-04 11:51:59,506 INFO L765 garLoopResultBuilder]: At program point L46(lines 21 47) the Hoare annotation is: true [2021-07-04 11:51:59,506 INFO L762 garLoopResultBuilder]: For program point L34(lines 34 37) no Hoare annotation was computed. [2021-07-04 11:51:59,506 INFO L762 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,506 INFO L762 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,507 INFO L762 garLoopResultBuilder]: For program point L14-3(lines 1 47) no Hoare annotation was computed. [2021-07-04 11:51:59,507 INFO L762 garLoopResultBuilder]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,507 INFO L762 garLoopResultBuilder]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-07-04 11:51:59,507 INFO L762 garLoopResultBuilder]: For program point L14-7(lines 1 47) no Hoare annotation was computed. [2021-07-04 11:51:59,507 INFO L762 garLoopResultBuilder]: For program point L39-2(lines 39 45) no Hoare annotation was computed. [2021-07-04 11:51:59,507 INFO L765 garLoopResultBuilder]: At program point L39-3(lines 39 45) the Hoare annotation is: true [2021-07-04 11:51:59,508 INFO L762 garLoopResultBuilder]: For program point L39-4(lines 39 45) no Hoare annotation was computed. [2021-07-04 11:51:59,508 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-04 11:51:59,509 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 11:51:59,509 INFO L303 ceAbstractionStarter]: Result for error location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION was SAFE (2/2) [2021-07-04 11:51:59,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 11:51:59 BoogieIcfgContainer [2021-07-04 11:51:59,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 11:51:59,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 11:51:59,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 11:51:59,517 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 11:51:59,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:51:58" (3/4) ... [2021-07-04 11:51:59,520 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-04 11:51:59,527 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-07-04 11:51:59,527 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-07-04 11:51:59,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-04 11:51:59,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-04 11:51:59,556 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-04 11:51:59,556 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 11:51:59,556 INFO L168 Benchmark]: Toolchain (without parser) took 1564.45 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 42.5 MB in the beginning and 36.9 MB in the end (delta: 5.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. [2021-07-04 11:51:59,557 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 44.1 MB in the end (delta: 51.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 11:51:59,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.64 ms. Allocated memory is still 62.9 MB. Free memory was 42.2 MB in the beginning and 32.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-04 11:51:59,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.24 ms. Allocated memory is still 62.9 MB. Free memory was 32.6 MB in the beginning and 45.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 11:51:59,557 INFO L168 Benchmark]: Boogie Preprocessor took 15.91 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 11:51:59,557 INFO L168 Benchmark]: RCFGBuilder took 324.97 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 29.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-07-04 11:51:59,558 INFO L168 Benchmark]: TraceAbstraction took 1000.23 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 28.8 MB in the beginning and 39.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-07-04 11:51:59,558 INFO L168 Benchmark]: Witness Printer took 38.77 ms. Allocated memory is still 81.8 MB. Free memory was 39.6 MB in the beginning and 36.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 11:51:59,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 44.1 MB in the end (delta: 51.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 123.64 ms. Allocated memory is still 62.9 MB. Free memory was 42.2 MB in the beginning and 32.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.24 ms. Allocated memory is still 62.9 MB. Free memory was 32.6 MB in the beginning and 45.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.91 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 324.97 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 29.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1000.23 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 28.8 MB in the beginning and 39.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Witness Printer took 38.77 ms. Allocated memory is still 81.8 MB. Free memory was 39.6 MB in the beginning and 36.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 589.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 23.3ms, AutomataDifference: 185.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 20.3ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 25 SDslu, 53 SDs, 0 SdLazy, 67 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 13 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 11.2ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 4.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 8.4ms SsaConstructionTime, 64.7ms SatisfiabilityAnalysisTime, 152.9ms InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 1/1 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 341.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 1.7ms, AutomataDifference: 165.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 12.2ms, InitialAbstractionConstructionTime: 1.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 31 SDslu, 62 SDs, 0 SdLazy, 79 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 14 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 7.3ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 4.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 8.8ms SsaConstructionTime, 47.8ms SatisfiabilityAnalysisTime, 74.8ms InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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 2 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-07-04 11:51:59,584 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...