./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/sum01_bug02.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 67768b34e7b9299b4c0862a201d7fe793c7261b3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 10:35:26,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:35:26,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:35:26,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:35:26,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:35:26,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:35:26,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:35:26,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:35:26,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:35:26,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:35:26,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:35:26,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:35:26,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:35:26,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:35:26,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:35:26,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:35:26,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:35:26,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:35:26,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:35:26,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:35:26,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:35:26,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:35:26,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:35:26,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:35:26,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:35:26,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:35:26,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:35:26,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:35:26,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:35:26,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:35:26,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:35:26,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:35:26,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:35:26,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:35:26,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:35:26,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:35:26,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:35:26,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:35:26,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:35:26,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:35:26,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:35:26,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:35:26,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:35:26,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:35:26,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:35:26,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:35:26,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:35:26,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:35:26,547 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:35:26,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:35:26,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:35:26,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:35:26,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:35:26,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:35:26,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:35:26,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:35:26,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:35:26,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:35:26,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:35:26,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:35:26,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:35:26,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:35:26,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:35:26,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:35:26,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:35:26,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2021-08-29 10:35:26,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:35:26,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:35:26,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:35:26,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:35:26,823 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:35:26,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2021-08-29 10:35:26,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64a4167b3/fe73c20d83d54ec197765fbdf99f8ff6/FLAG654230f30 [2021-08-29 10:35:27,182 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:35:27,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2021-08-29 10:35:27,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64a4167b3/fe73c20d83d54ec197765fbdf99f8ff6/FLAG654230f30 [2021-08-29 10:35:27,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64a4167b3/fe73c20d83d54ec197765fbdf99f8ff6 [2021-08-29 10:35:27,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:35:27,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:35:27,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:35:27,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:35:27,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:35:27,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb22920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27, skipping insertion in model container [2021-08-29 10:35:27,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:35:27,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:35:27,742 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/loops/sum01_bug02.i[812,825] [2021-08-29 10:35:27,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:35:27,754 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:35:27,784 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/loops/sum01_bug02.i[812,825] [2021-08-29 10:35:27,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:35:27,806 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:35:27,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27 WrapperNode [2021-08-29 10:35:27,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:35:27,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:35:27,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:35:27,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:35:27,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:35:27,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:35:27,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:35:27,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:35:27,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:35:27,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:35:27,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:35:27,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:35:27,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (1/1) ... [2021-08-29 10:35:27,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:35:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:27,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 10:35:27,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 10:35:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:35:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:35:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:35:27,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:35:28,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:35:28,040 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 10:35:28,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:28 BoogieIcfgContainer [2021-08-29 10:35:28,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:35:28,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:35:28,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:35:28,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:35:28,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:35:27" (1/3) ... [2021-08-29 10:35:28,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1fca55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:35:28, skipping insertion in model container [2021-08-29 10:35:28,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:27" (2/3) ... [2021-08-29 10:35:28,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1fca55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:35:28, skipping insertion in model container [2021-08-29 10:35:28,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:28" (3/3) ... [2021-08-29 10:35:28,048 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-08-29 10:35:28,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:35:28,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:35:28,093 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:35:28,100 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 10:35:28,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:35:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:35:28,125 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:28,125 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:35:28,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2021-08-29 10:35:28,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:28,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240864211] [2021-08-29 10:35:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:28,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:28,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:28,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240864211] [2021-08-29 10:35:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240864211] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:35:28,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:35:28,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 10:35:28,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276342905] [2021-08-29 10:35:28,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 10:35:28,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 10:35:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:35:28,301 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:28,367 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-08-29 10:35:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 10:35:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 10:35:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:28,374 INFO L225 Difference]: With dead ends: 20 [2021-08-29 10:35:28,374 INFO L226 Difference]: Without dead ends: 10 [2021-08-29 10:35:28,376 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 10:35:28,378 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.90ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:28,379 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 0.18ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 55.90ms Time] [2021-08-29 10:35:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-29 10:35:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-29 10:35:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-08-29 10:35:28,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-08-29 10:35:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:28,407 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-08-29 10:35:28,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-08-29 10:35:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:35:28,408 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:28,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:35:28,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:35:28,408 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 889611988, now seen corresponding path program 1 times [2021-08-29 10:35:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:28,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493031288] [2021-08-29 10:35:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:28,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:28,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:28,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493031288] [2021-08-29 10:35:28,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493031288] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:35:28,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:35:28,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:35:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943084864] [2021-08-29 10:35:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:35:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:35:28,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:35:28,479 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:28,530 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-08-29 10:35:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 10:35:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 10:35:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:28,531 INFO L225 Difference]: With dead ends: 18 [2021-08-29 10:35:28,531 INFO L226 Difference]: Without dead ends: 14 [2021-08-29 10:35:28,532 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.00ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 10:35:28,533 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.00ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:28,535 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 35.00ms Time] [2021-08-29 10:35:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-29 10:35:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-29 10:35:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-29 10:35:28,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-08-29 10:35:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:28,540 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-29 10:35:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-29 10:35:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 10:35:28,541 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:28,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:28,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:35:28,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1711509127, now seen corresponding path program 1 times [2021-08-29 10:35:28,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:28,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652080459] [2021-08-29 10:35:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:28,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:28,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:28,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652080459] [2021-08-29 10:35:28,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652080459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:35:28,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381743297] [2021-08-29 10:35:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:28,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:28,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:28,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:35:28,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 10:35:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:28,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 10:35:28,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:35:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:29,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:35:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:29,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381743297] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:35:29,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:35:29,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-08-29 10:35:29,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563505614] [2021-08-29 10:35:29,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-29 10:35:29,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-29 10:35:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-29 10:35:29,202 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:29,436 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-08-29 10:35:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 10:35:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 10:35:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:29,437 INFO L225 Difference]: With dead ends: 35 [2021-08-29 10:35:29,437 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 10:35:29,445 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 316.69ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-29 10:35:29,447 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.22ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:29,448 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [13 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 83.22ms Time] [2021-08-29 10:35:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 10:35:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-08-29 10:35:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 10:35:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-29 10:35:29,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2021-08-29 10:35:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:29,457 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-29 10:35:29,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-29 10:35:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 10:35:29,457 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:29,458 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:29,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 10:35:29,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:29,673 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1816192992, now seen corresponding path program 1 times [2021-08-29 10:35:29,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:29,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249782319] [2021-08-29 10:35:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:29,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:29,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:29,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249782319] [2021-08-29 10:35:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249782319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:35:29,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725443574] [2021-08-29 10:35:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:29,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:29,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:29,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:35:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:29,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 10:35:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 10:35:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:35:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:29,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:35:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:29,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725443574] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:35:29,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:35:29,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-08-29 10:35:29,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363887550] [2021-08-29 10:35:29,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 10:35:29,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 10:35:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:35:29,884 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 10:35:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:29,918 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-08-29 10:35:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 10:35:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) Word has length 14 [2021-08-29 10:35:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:29,919 INFO L225 Difference]: With dead ends: 35 [2021-08-29 10:35:29,919 INFO L226 Difference]: Without dead ends: 23 [2021-08-29 10:35:29,920 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.84ms TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:35:29,920 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.47ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:29,921 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 29.47ms Time] [2021-08-29 10:35:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-29 10:35:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-29 10:35:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-29 10:35:29,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-08-29 10:35:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:29,924 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-29 10:35:29,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 10:35:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-29 10:35:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 10:35:29,924 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:29,924 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:29,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 10:35:30,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-29 10:35:30,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1968846659, now seen corresponding path program 2 times [2021-08-29 10:35:30,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:30,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549107852] [2021-08-29 10:35:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:30,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 10:35:30,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:30,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549107852] [2021-08-29 10:35:30,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549107852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:35:30,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025704724] [2021-08-29 10:35:30,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:35:30,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:30,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:30,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:35:30,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 10:35:30,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:35:30,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:35:30,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-29 10:35:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:35:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:30,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:35:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:30,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025704724] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:35:30,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:35:30,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2021-08-29 10:35:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143807355] [2021-08-29 10:35:30,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-29 10:35:30,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-29 10:35:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-08-29 10:35:30,874 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:31,278 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-29 10:35:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-29 10:35:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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 18 [2021-08-29 10:35:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:31,280 INFO L225 Difference]: With dead ends: 40 [2021-08-29 10:35:31,280 INFO L226 Difference]: Without dead ends: 34 [2021-08-29 10:35:31,281 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 548.28ms TimeCoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2021-08-29 10:35:31,281 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.21ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:31,281 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 340 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [17 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 143.21ms Time] [2021-08-29 10:35:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-29 10:35:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-08-29 10:35:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-29 10:35:31,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-08-29 10:35:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:31,285 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-29 10:35:31,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-29 10:35:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 10:35:31,286 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:31,286 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:31,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 10:35:31,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:31,501 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1540417770, now seen corresponding path program 2 times [2021-08-29 10:35:31,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:31,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668171131] [2021-08-29 10:35:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:31,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:31,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:31,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668171131] [2021-08-29 10:35:31,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668171131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:35:31,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775286566] [2021-08-29 10:35:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:35:31,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:31,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:35:31,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 10:35:31,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:35:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:35:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 10:35:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:35:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:31,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:35:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:31,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775286566] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:35:31,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:35:31,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-08-29 10:35:31,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945428848] [2021-08-29 10:35:31,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-29 10:35:31,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-29 10:35:31,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=164, Unknown=0, NotChecked=0, Total=306 [2021-08-29 10:35:31,786 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:31,833 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-08-29 10:35:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 10:35:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-29 10:35:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:31,834 INFO L225 Difference]: With dead ends: 41 [2021-08-29 10:35:31,834 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 10:35:31,835 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 82.84ms TimeCoverageRelationStatistics Valid=142, Invalid=164, Unknown=0, NotChecked=0, Total=306 [2021-08-29 10:35:31,835 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.01ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:31,835 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [16 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 36.01ms Time] [2021-08-29 10:35:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 10:35:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-08-29 10:35:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-29 10:35:31,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 22 [2021-08-29 10:35:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:31,838 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-29 10:35:31,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-29 10:35:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-29 10:35:31,839 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:31,839 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:31,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 10:35:32,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:32,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash 454184884, now seen corresponding path program 3 times [2021-08-29 10:35:32,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:32,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381328558] [2021-08-29 10:35:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:32,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:35:32,064 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 10:35:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:35:32,096 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 10:35:32,096 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 10:35:32,097 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:35:32,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 10:35:32,102 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:35:32,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:35:32 BoogieIcfgContainer [2021-08-29 10:35:32,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:35:32,133 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:35:32,133 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:35:32,133 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:35:32,134 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:28" (3/4) ... [2021-08-29 10:35:32,135 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 10:35:32,169 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:35:32,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:35:32,169 INFO L158 Benchmark]: Toolchain (without parser) took 4543.74ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 32.7MB in the beginning and 31.8MB in the end (delta: 877.6kB). Peak memory consumption was 29.0MB. Max. memory is 16.1GB. [2021-08-29 10:35:32,170 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 54.5MB. Free memory was 37.4MB in the beginning and 37.4MB in the end (delta: 38.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:35:32,170 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.29ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 32.5MB in the beginning and 50.7MB in the end (delta: -18.2MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2021-08-29 10:35:32,170 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.06ms. Allocated memory is still 67.1MB. Free memory was 50.7MB in the beginning and 49.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:35:32,170 INFO L158 Benchmark]: Boogie Preprocessor took 30.39ms. Allocated memory is still 67.1MB. Free memory was 49.3MB in the beginning and 48.4MB in the end (delta: 946.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:35:32,170 INFO L158 Benchmark]: RCFGBuilder took 177.96ms. Allocated memory is still 67.1MB. Free memory was 48.2MB in the beginning and 40.0MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:35:32,171 INFO L158 Benchmark]: TraceAbstraction took 4088.91ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 39.6MB in the beginning and 33.9MB in the end (delta: 5.8MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2021-08-29 10:35:32,171 INFO L158 Benchmark]: Witness Printer took 35.87ms. Allocated memory is still 81.8MB. Free memory was 33.9MB in the beginning and 31.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:35:32,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 54.5MB. Free memory was 37.4MB in the beginning and 37.4MB in the end (delta: 38.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.29ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 32.5MB in the beginning and 50.7MB in the end (delta: -18.2MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.06ms. Allocated memory is still 67.1MB. Free memory was 50.7MB in the beginning and 49.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.39ms. Allocated memory is still 67.1MB. Free memory was 49.3MB in the beginning and 48.4MB in the end (delta: 946.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 177.96ms. Allocated memory is still 67.1MB. Free memory was 48.2MB in the beginning and 40.0MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4088.91ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 39.6MB in the beginning and 33.9MB in the end (delta: 5.8MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * Witness Printer took 35.87ms. Allocated memory is still 81.8MB. Free memory was 33.9MB in the beginning and 31.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i