./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-1.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/recursive-simple/id_i10_o10-1.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 68fd8ffa149cd68eb012d97df5d4befaa28f95fa ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 16:32:22,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:32:22,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:32:22,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:32:22,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:32:22,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:32:22,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:32:22,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:32:22,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:32:22,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:32:22,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:32:22,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:32:22,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:32:22,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:32:22,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:32:22,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:32:22,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:32:22,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:32:22,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:32:22,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:32:22,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:32:22,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:32:22,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:32:22,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:32:22,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:32:22,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:32:22,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:32:22,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:32:22,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:32:22,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:32:22,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:32:22,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:32:22,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:32:22,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:32:22,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:32:22,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:32:22,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:32:22,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:32:22,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:32:22,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:32:22,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:32:22,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:32:22,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:32:22,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:32:22,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:32:22,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:32:22,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:32:22,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:32:22,526 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:32:22,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:32:22,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:32:22,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:32:22,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:32:22,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:32:22,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:32:22,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:32:22,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:32:22,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:32:22,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:32:22,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:32:22,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:32:22,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:32:22,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:32:22,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:32:22,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:32:22,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:32:22,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:32:22,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:32:22,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:32:22,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:32:22,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:32:22,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:32:22,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68fd8ffa149cd68eb012d97df5d4befaa28f95fa [2021-08-29 16:32:22,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:32:22,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:32:22,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:32:22,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:32:22,825 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:32:22,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2021-08-29 16:32:22,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d2b5376/127e05f59ff94552b40cd0be82e78117/FLAG91c5d5343 [2021-08-29 16:32:23,329 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:32:23,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2021-08-29 16:32:23,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d2b5376/127e05f59ff94552b40cd0be82e78117/FLAG91c5d5343 [2021-08-29 16:32:23,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d2b5376/127e05f59ff94552b40cd0be82e78117 [2021-08-29 16:32:23,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:32:23,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:32:23,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:32:23,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:32:23,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:32:23,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46340480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23, skipping insertion in model container [2021-08-29 16:32:23,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:32:23,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:32:23,536 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/recursive-simple/id_i10_o10-1.c[454,467] [2021-08-29 16:32:23,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:32:23,547 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:32:23,560 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/recursive-simple/id_i10_o10-1.c[454,467] [2021-08-29 16:32:23,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:32:23,577 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:32:23,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23 WrapperNode [2021-08-29 16:32:23,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:32:23,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:32:23,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:32:23,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:32:23,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:32:23,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:32:23,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:32:23,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:32:23,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:32:23,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:32:23,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:32:23,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:32:23,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (1/1) ... [2021-08-29 16:32:23,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:32:23,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:23,683 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 16:32:23,705 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 16:32:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:32:23,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-08-29 16:32:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-08-29 16:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:32:23,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:32:23,862 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:32:23,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:23 BoogieIcfgContainer [2021-08-29 16:32:23,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:32:23,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:32:23,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:32:23,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:32:23,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:32:23" (1/3) ... [2021-08-29 16:32:23,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486973b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:32:23, skipping insertion in model container [2021-08-29 16:32:23,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:23" (2/3) ... [2021-08-29 16:32:23,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486973b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:32:23, skipping insertion in model container [2021-08-29 16:32:23,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:23" (3/3) ... [2021-08-29 16:32:23,874 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2021-08-29 16:32:23,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:32:23,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:32:23,925 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:32:23,933 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 16:32:23,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:32:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:32:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:32:23,952 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:23,953 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:23,953 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:23,958 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-08-29 16:32:23,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:23,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355196948] [2021-08-29 16:32:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:23,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:24,207 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 16:32:24,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:24,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355196948] [2021-08-29 16:32:24,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355196948] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:32:24,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:32:24,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:32:24,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189811586] [2021-08-29 16:32:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:32:24,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:32:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:24,268 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:32:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:24,392 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-29 16:32:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:32:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-29 16:32:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:24,401 INFO L225 Difference]: With dead ends: 28 [2021-08-29 16:32:24,401 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 16:32:24,403 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.77ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:24,406 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.45ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:24,407 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 85.45ms Time] [2021-08-29 16:32:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 16:32:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 16:32:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-29 16:32:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-29 16:32:24,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-08-29 16:32:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:24,437 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-29 16:32:24,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:32:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-29 16:32:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 16:32:24,438 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:24,439 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:24,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:32:24,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-08-29 16:32:24,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:24,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914321509] [2021-08-29 16:32:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:24,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:24,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:24,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:24,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:24,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914321509] [2021-08-29 16:32:24,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914321509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:24,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543746954] [2021-08-29 16:32:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:24,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:24,523 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 16:32:24,557 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 16:32:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:32:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:24,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:32:24,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543746954] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:24,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:24,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2021-08-29 16:32:24,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329124817] [2021-08-29 16:32:24,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 16:32:24,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 16:32:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-29 16:32:24,957 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:32:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:25,035 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-29 16:32:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 16:32:25,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-08-29 16:32:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:25,037 INFO L225 Difference]: With dead ends: 22 [2021-08-29 16:32:25,037 INFO L226 Difference]: Without dead ends: 18 [2021-08-29 16:32:25,038 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.61ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:32:25,040 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.16ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:25,041 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 46.16ms Time] [2021-08-29 16:32:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-29 16:32:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-29 16:32:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-29 16:32:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-29 16:32:25,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-29 16:32:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:25,055 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-29 16:32:25,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:32:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-29 16:32:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 16:32:25,063 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:25,063 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:25,083 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 16:32:25,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:25,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:25,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-08-29 16:32:25,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:25,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658651494] [2021-08-29 16:32:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:25,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:25,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:25,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:25,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:32:25,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:25,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658651494] [2021-08-29 16:32:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658651494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:25,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537123062] [2021-08-29 16:32:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:32:25,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:25,438 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 16:32:25,439 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 16:32:25,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:32:25,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:32:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:32:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 16:32:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537123062] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:25,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:25,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2021-08-29 16:32:25,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335379711] [2021-08-29 16:32:25,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 16:32:25,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 16:32:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:32:25,837 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:32:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:25,929 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-29 16:32:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 16:32:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-08-29 16:32:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:25,931 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:32:25,931 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 16:32:25,932 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 77.45ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-29 16:32:25,934 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.82ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:25,935 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 4 Invalid, 91 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 53.82ms Time] [2021-08-29 16:32:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 16:32:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 16:32:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-29 16:32:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-29 16:32:25,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-08-29 16:32:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:25,943 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-29 16:32:25,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:32:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-29 16:32:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 16:32:25,945 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:25,945 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:25,973 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 16:32:26,164 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,SelfDestructingSolverStorable2 [2021-08-29 16:32:26,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:26,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-08-29 16:32:26,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:26,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495868016] [2021-08-29 16:32:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:26,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:26,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:26,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:32:26,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:26,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495868016] [2021-08-29 16:32:26,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495868016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:26,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171021676] [2021-08-29 16:32:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:32:26,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:26,329 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 16:32:26,344 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 16:32:26,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 16:32:26,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:26,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 16:32:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:32:26,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:32:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171021676] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:26,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:26,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2021-08-29 16:32:26,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053386851] [2021-08-29 16:32:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-29 16:32:26,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-29 16:32:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-08-29 16:32:26,919 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2021-08-29 16:32:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:27,173 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-08-29 16:32:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 16:32:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28 [2021-08-29 16:32:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:27,175 INFO L225 Difference]: With dead ends: 39 [2021-08-29 16:32:27,175 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 16:32:27,177 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 348.02ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-08-29 16:32:27,178 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.86ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:27,178 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 11 Invalid, 178 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [14 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 91.86ms Time] [2021-08-29 16:32:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 16:32:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-29 16:32:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-08-29 16:32:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-29 16:32:27,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-08-29 16:32:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-29 16:32:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2021-08-29 16:32:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-29 16:32:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-29 16:32:27,187 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:27,187 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:27,210 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 16:32:27,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:27,402 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:27,403 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2021-08-29 16:32:27,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:27,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64065116] [2021-08-29 16:32:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:27,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:32:27,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:27,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64065116] [2021-08-29 16:32:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64065116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:27,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481453278] [2021-08-29 16:32:27,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:32:27,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:27,721 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 16:32:27,722 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 16:32:27,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:32:27,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 16:32:27,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:32:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-29 16:32:29,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481453278] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:29,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:29,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2021-08-29 16:32:29,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111495786] [2021-08-29 16:32:29,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 16:32:29,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 16:32:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-08-29 16:32:29,752 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:32:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:29,914 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-29 16:32:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 16:32:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-08-29 16:32:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:29,915 INFO L225 Difference]: With dead ends: 40 [2021-08-29 16:32:29,916 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 16:32:29,916 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 183.47ms TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2021-08-29 16:32:29,917 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 92 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.47ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:29,917 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 4 Invalid, 187 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [37 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 106.47ms Time] [2021-08-29 16:32:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 16:32:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-29 16:32:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-29 16:32:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-29 16:32:29,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-08-29 16:32:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:29,923 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-29 16:32:29,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:32:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-29 16:32:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-29 16:32:29,925 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:29,925 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:29,952 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 16:32:30,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:30,148 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2021-08-29 16:32:30,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:30,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427394417] [2021-08-29 16:32:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:30,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:32:30,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427394417] [2021-08-29 16:32:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427394417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:30,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235328793] [2021-08-29 16:32:30,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:32:30,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:30,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 16:32:30,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 16:32:30,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-29 16:32:30,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:30,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-29 16:32:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:32:30,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:32:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235328793] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:32,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:32,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 36 [2021-08-29 16:32:32,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939093613] [2021-08-29 16:32:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-29 16:32:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-29 16:32:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2021-08-29 16:32:32,735 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 36 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 25 states have internal predecessors, (53), 3 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-08-29 16:32:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:33,117 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-08-29 16:32:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-29 16:32:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 25 states have internal predecessors, (53), 3 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 58 [2021-08-29 16:32:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:33,119 INFO L225 Difference]: With dead ends: 48 [2021-08-29 16:32:33,119 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 16:32:33,121 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 570.22ms TimeCoverageRelationStatistics Valid=515, Invalid=2677, Unknown=0, NotChecked=0, Total=3192 [2021-08-29 16:32:33,121 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.76ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:33,122 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 16 Invalid, 278 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [14 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 111.76ms Time] [2021-08-29 16:32:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 16:32:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-29 16:32:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-29 16:32:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-29 16:32:33,127 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 58 [2021-08-29 16:32:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:33,128 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-29 16:32:33,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 25 states have internal predecessors, (53), 3 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-08-29 16:32:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-29 16:32:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-29 16:32:33,129 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:33,129 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:33,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:33,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:33,345 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 6 times [2021-08-29 16:32:33,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:33,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121485304] [2021-08-29 16:32:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:33,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:32:33,363 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 16:32:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:32:33,409 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 16:32:33,409 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 16:32:33,410 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:32:33,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 16:32:33,418 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:32:33,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:32:33 BoogieIcfgContainer [2021-08-29 16:32:33,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:32:33,467 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:32:33,467 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:32:33,467 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:32:33,467 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:23" (3/4) ... [2021-08-29 16:32:33,469 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 16:32:33,507 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:32:33,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:32:33,508 INFO L158 Benchmark]: Toolchain (without parser) took 10149.87ms. Allocated memory was 67.1MB in the beginning and 104.9MB in the end (delta: 37.7MB). Free memory was 50.7MB in the beginning and 45.6MB in the end (delta: 5.1MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. [2021-08-29 16:32:33,508 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 67.1MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:32:33,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.63ms. Allocated memory is still 67.1MB. Free memory was 50.5MB in the beginning and 52.1MB in the end (delta: -1.5MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2021-08-29 16:32:33,508 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.71ms. Allocated memory is still 67.1MB. Free memory was 52.1MB in the beginning and 50.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:32:33,509 INFO L158 Benchmark]: Boogie Preprocessor took 18.96ms. Allocated memory is still 67.1MB. Free memory was 50.6MB in the beginning and 49.7MB in the end (delta: 838.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:32:33,509 INFO L158 Benchmark]: RCFGBuilder took 221.29ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 41.6MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:32:33,509 INFO L158 Benchmark]: TraceAbstraction took 9599.24ms. Allocated memory was 67.1MB in the beginning and 104.9MB in the end (delta: 37.7MB). Free memory was 41.1MB in the beginning and 49.8MB in the end (delta: -8.7MB). Peak memory consumption was 31.2MB. Max. memory is 16.1GB. [2021-08-29 16:32:33,510 INFO L158 Benchmark]: Witness Printer took 40.61ms. Allocated memory is still 104.9MB. Free memory was 49.8MB in the beginning and 45.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 16:32:33,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 67.1MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 218.63ms. Allocated memory is still 67.1MB. Free memory was 50.5MB in the beginning and 52.1MB in the end (delta: -1.5MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.71ms. Allocated memory is still 67.1MB. Free memory was 52.1MB in the beginning and 50.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.96ms. Allocated memory is still 67.1MB. Free memory was 50.6MB in the beginning and 49.7MB in the end (delta: 838.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 221.29ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 41.6MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9599.24ms. Allocated memory was 67.1MB in the beginning and 104.9MB in the end (delta: 37.7MB). Free memory was 41.1MB in the beginning and 49.8MB in the end (delta: -8.7MB). Peak memory consumption was 31.2MB. Max. memory is 16.1GB. * Witness Printer took 40.61ms. Allocated memory is still 104.9MB. Free memory was 49.8MB in the beginning and 45.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 10; [L13] CALL, EXPR id(input) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 10 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9492.55ms, OverallIterations: 7, TraceHistogramMax: 11, EmptinessCheckTime: 21.47ms, AutomataDifference: 1188.73ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.96ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 222 SdHoareTripleChecker+Valid, 495.51ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 54 SdHoareTripleChecker+Invalid, 397.05ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 369 mSDsCounter, 83 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 753 IncrementalHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 83 mSolverCounterUnsat, 14 mSDtfsCounter, 753 mSolverCounterSat, 18.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 491 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1278.53ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=6, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 50.01ms AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.33ms SsaConstructionTime, 201.93ms SatisfiabilityAnalysisTime, 6512.73ms InterpolantComputationTime, 432 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 1284 SizeOfPredicates, 13 NumberOfNonLiveVariables, 498 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 549/1206 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 16:32:33,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...