./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-loops/diamond_2-1.c --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/bitvector-loops/diamond_2-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fdc3c556d58a22f0b5db1f711cca081eb180f3b4 ............................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 03:08:14,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 03:08:14,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 03:08:14,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 03:08:14,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 03:08:14,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 03:08:14,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 03:08:14,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 03:08:14,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 03:08:14,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 03:08:14,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 03:08:14,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 03:08:14,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 03:08:14,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 03:08:14,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 03:08:14,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 03:08:14,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 03:08:14,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 03:08:14,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 03:08:14,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 03:08:14,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 03:08:14,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 03:08:14,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 03:08:14,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 03:08:14,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 03:08:14,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 03:08:14,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 03:08:14,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 03:08:14,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 03:08:14,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 03:08:14,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 03:08:14,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 03:08:14,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 03:08:14,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 03:08:14,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 03:08:14,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 03:08:14,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 03:08:14,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 03:08:14,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 03:08:14,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 03:08:14,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 03:08:14,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 03:08:14,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 03:08:14,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 03:08:14,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 03:08:14,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 03:08:14,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 03:08:14,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 03:08:14,774 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 03:08:14,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 03:08:14,775 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 03:08:14,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 03:08:14,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 03:08:14,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 03:08:14,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 03:08:14,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 03:08:14,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 03:08:14,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 03:08:14,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 03:08:14,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 03:08:14,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 03:08:14,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 03:08:14,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 03:08:14,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdc3c556d58a22f0b5db1f711cca081eb180f3b4 [2021-08-29 03:08:15,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 03:08:15,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 03:08:15,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 03:08:15,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 03:08:15,029 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 03:08:15,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2021-08-29 03:08:15,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd78fda5c/5d652019ea12406a9247d004f072bd53/FLAGea4306c33 [2021-08-29 03:08:15,394 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 03:08:15,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2021-08-29 03:08:15,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd78fda5c/5d652019ea12406a9247d004f072bd53/FLAGea4306c33 [2021-08-29 03:08:15,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd78fda5c/5d652019ea12406a9247d004f072bd53 [2021-08-29 03:08:15,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 03:08:15,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 03:08:15,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 03:08:15,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 03:08:15,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 03:08:15,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 03:08:15" (1/1) ... [2021-08-29 03:08:15,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a8c377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:15, skipping insertion in model container [2021-08-29 03:08:15,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 03:08:15" (1/1) ... [2021-08-29 03:08:15,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 03:08:15,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 03:08:15,917 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/bitvector-loops/diamond_2-1.c[373,386] [2021-08-29 03:08:15,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 03:08:15,950 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 03:08:15,987 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/bitvector-loops/diamond_2-1.c[373,386] [2021-08-29 03:08:16,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 03:08:16,012 INFO L208 MainTranslator]: Completed translation [2021-08-29 03:08:16,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16 WrapperNode [2021-08-29 03:08:16,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 03:08:16,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 03:08:16,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 03:08:16,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 03:08:16,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 03:08:16,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 03:08:16,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 03:08:16,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 03:08:16,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 03:08:16,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 03:08:16,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 03:08:16,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 03:08:16,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (1/1) ... [2021-08-29 03:08:16,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 03:08:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 03:08:16,130 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 03:08:16,152 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 03:08:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 03:08:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 03:08:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 03:08:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 03:08:16,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 03:08:16,316 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 03:08:16,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:08:16 BoogieIcfgContainer [2021-08-29 03:08:16,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 03:08:16,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 03:08:16,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 03:08:16,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 03:08:16,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 03:08:15" (1/3) ... [2021-08-29 03:08:16,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235244d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 03:08:16, skipping insertion in model container [2021-08-29 03:08:16,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:08:16" (2/3) ... [2021-08-29 03:08:16,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235244d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 03:08:16, skipping insertion in model container [2021-08-29 03:08:16,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:08:16" (3/3) ... [2021-08-29 03:08:16,325 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2021-08-29 03:08:16,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 03:08:16,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 03:08:16,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 03:08:16,378 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 03:08:16,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 03:08:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 03:08:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 03:08:16,407 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:08:16,407 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 03:08:16,407 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:08:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:08:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash 891600039, now seen corresponding path program 1 times [2021-08-29 03:08:16,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:08:16,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774141786] [2021-08-29 03:08:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:08:16,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:08:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:08:16,529 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 03:08:16,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:08:16,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774141786] [2021-08-29 03:08:16,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774141786] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:08:16,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:08:16,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 03:08:16,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019646236] [2021-08-29 03:08:16,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 03:08:16,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:08:16,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 03:08:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 03:08:16,567 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 03:08:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:08:16,631 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-08-29 03:08:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 03:08:16,633 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 03:08:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:08:16,637 INFO L225 Difference]: With dead ends: 27 [2021-08-29 03:08:16,638 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 03:08:16,639 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 03:08:16,647 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.27ms IncrementalHoareTripleChecker+Time [2021-08-29 03:08:16,647 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.26ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 53.27ms Time] [2021-08-29 03:08:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 03:08:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 03:08:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 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 03:08:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2021-08-29 03:08:16,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 6 [2021-08-29 03:08:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:08:16,669 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2021-08-29 03:08:16,670 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 03:08:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2021-08-29 03:08:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 03:08:16,670 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:08:16,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 03:08:16,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 03:08:16,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:08:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:08:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash 889693415, now seen corresponding path program 1 times [2021-08-29 03:08:16,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:08:16,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826999372] [2021-08-29 03:08:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:08:16,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:08:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:08:16,776 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 03:08:16,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:08:16,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826999372] [2021-08-29 03:08:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826999372] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:08:16,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:08:16,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:08:16,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651629429] [2021-08-29 03:08:16,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:08:16,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:08:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:08:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:08:16,780 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 03:08:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:08:16,833 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2021-08-29 03:08:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:08:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 03:08:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:08:16,834 INFO L225 Difference]: With dead ends: 23 [2021-08-29 03:08:16,838 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 03:08:16,838 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.86ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:08:16,839 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.11ms IncrementalHoareTripleChecker+Time [2021-08-29 03:08:16,840 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.55ms Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 48.11ms Time] [2021-08-29 03:08:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 03:08:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-29 03:08:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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 03:08:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2021-08-29 03:08:16,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 6 [2021-08-29 03:08:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:08:16,845 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2021-08-29 03:08:16,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 03:08:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2021-08-29 03:08:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 03:08:16,847 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:08:16,848 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:08:16,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 03:08:16,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:08:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:08:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1797740634, now seen corresponding path program 1 times [2021-08-29 03:08:16,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:08:16,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518368613] [2021-08-29 03:08:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:08:16,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:08:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:08:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 03:08:16,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:08:16,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518368613] [2021-08-29 03:08:16,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518368613] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:08:16,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:08:16,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:08:16,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966268621] [2021-08-29 03:08:16,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:08:16,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:08:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:08:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:08:16,899 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 03:08:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:08:16,987 INFO L93 Difference]: Finished difference Result 48 states and 78 transitions. [2021-08-29 03:08:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:08:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 17 [2021-08-29 03:08:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:08:16,988 INFO L225 Difference]: With dead ends: 48 [2021-08-29 03:08:16,988 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 03:08:16,988 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:08:16,992 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.52ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.19ms IncrementalHoareTripleChecker+Time [2021-08-29 03:08:16,994 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.52ms Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 78.19ms Time] [2021-08-29 03:08:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 03:08:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-08-29 03:08:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:08:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-08-29 03:08:17,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 17 [2021-08-29 03:08:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:08:17,001 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-08-29 03:08:17,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 03:08:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-08-29 03:08:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 03:08:17,002 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:08:17,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:08:17,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 03:08:17,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:08:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:08:17,003 INFO L82 PathProgramCache]: Analyzing trace with hash -170777494, now seen corresponding path program 1 times [2021-08-29 03:08:17,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:08:17,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184427040] [2021-08-29 03:08:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:08:17,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:08:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 03:08:17,034 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 03:08:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 03:08:17,081 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 03:08:17,081 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 03:08:17,083 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 03:08:17,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 03:08:17,090 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 03:08:17,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 03:08:17 BoogieIcfgContainer [2021-08-29 03:08:17,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 03:08:17,122 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 03:08:17,122 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 03:08:17,123 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 03:08:17,123 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:08:16" (3/4) ... [2021-08-29 03:08:17,124 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 03:08:17,174 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 03:08:17,174 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 03:08:17,175 INFO L158 Benchmark]: Toolchain (without parser) took 1347.30ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 58.8MB in the beginning and 69.9MB in the end (delta: -11.1MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,175 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 73.4MB. Free memory is still 56.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 03:08:17,176 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.08ms. Allocated memory is still 73.4MB. Free memory was 58.4MB in the beginning and 57.3MB in the end (delta: 1.2MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,176 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.73ms. Allocated memory is still 73.4MB. Free memory was 57.3MB in the beginning and 55.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,176 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 73.4MB. Free memory was 55.6MB in the beginning and 54.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,177 INFO L158 Benchmark]: RCFGBuilder took 221.89ms. Allocated memory is still 73.4MB. Free memory was 54.3MB in the beginning and 44.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,177 INFO L158 Benchmark]: TraceAbstraction took 801.75ms. Allocated memory is still 73.4MB. Free memory was 44.0MB in the beginning and 28.4MB in the end (delta: 15.6MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,177 INFO L158 Benchmark]: Witness Printer took 52.38ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 28.4MB in the beginning and 69.9MB in the end (delta: -41.5MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-08-29 03:08:17,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 73.4MB. Free memory is still 56.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.08ms. Allocated memory is still 73.4MB. Free memory was 58.4MB in the beginning and 57.3MB in the end (delta: 1.2MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.73ms. Allocated memory is still 73.4MB. Free memory was 57.3MB in the beginning and 55.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 73.4MB. Free memory was 55.6MB in the beginning and 54.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 221.89ms. Allocated memory is still 73.4MB. Free memory was 54.3MB in the beginning and 44.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 801.75ms. Allocated memory is still 73.4MB. Free memory was 44.0MB in the beginning and 28.4MB in the end (delta: 15.6MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * Witness Printer took 52.38ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 28.4MB in the beginning and 69.9MB in the end (delta: -41.5MB). Peak memory consumption was 4.3MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x += 2 [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 [L17] COND FALSE !(x < 99) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 719.27ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 21.75ms, AutomataDifference: 269.73ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.27ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 179.57ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 144.17ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 129 IncrementalHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 0 mSDtfsCounter, 129 mSolverCounterSat, 1.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.18ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 21.36ms AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.72ms SsaConstructionTime, 86.60ms SatisfiabilityAnalysisTime, 154.54ms InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 RESULT: Ultimate proved your program to be incorrect! [2021-08-29 03:08:17,220 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...