./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF --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 9dc175bed280c85fbc7018a36f57353cd7d8c459346c67f95db055f6ec935a28 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:34:27,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:34:27,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:34:27,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:34:27,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:34:27,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:34:27,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:34:27,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:34:27,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:34:27,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:34:27,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:34:27,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:34:27,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:34:27,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:34:27,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:34:27,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:34:27,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:34:27,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:34:27,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:34:27,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:34:27,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:34:27,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:34:27,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:34:27,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:34:27,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:34:27,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:34:27,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:34:27,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:34:27,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:34:27,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:34:27,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:34:27,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:34:27,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:34:27,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:34:27,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:34:27,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:34:27,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:34:27,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:34:27,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:34:27,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:34:27,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:34:27,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:34:27,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:34:27,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:34:27,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:34:27,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:34:27,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:34:27,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:34:27,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:34:27,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:34:27,420 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:34:27,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:34:27,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:34:27,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:34:27,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:34:27,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:34:27,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:34:27,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:34:27,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:34:27,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:34:27,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:34:27,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:34:27,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:34:27,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:34:27,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:34:27,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:34:27,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:34:27,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:34:27,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:34:27,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:34:27,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:34:27,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:34:27,427 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:34:27,427 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:34:27,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:34:27,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:34:27,428 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dc175bed280c85fbc7018a36f57353cd7d8c459346c67f95db055f6ec935a28 [2021-11-20 06:34:27,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:34:27,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:34:27,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:34:27,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:34:27,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:34:27,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2021-11-20 06:34:27,991 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/data/1eb2034c2/87fcd477d37347ee8d3bd81fdf37f859/FLAG5c5d95f5c [2021-11-20 06:34:28,532 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:34:28,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2021-11-20 06:34:28,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/data/1eb2034c2/87fcd477d37347ee8d3bd81fdf37f859/FLAG5c5d95f5c [2021-11-20 06:34:28,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/data/1eb2034c2/87fcd477d37347ee8d3bd81fdf37f859 [2021-11-20 06:34:28,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:34:28,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:34:28,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:34:28,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:34:28,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:34:28,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:34:28" (1/1) ... [2021-11-20 06:34:28,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:28, skipping insertion in model container [2021-11-20 06:34:28,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:34:28" (1/1) ... [2021-11-20 06:34:28,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:34:28,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:34:29,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c[454,467] [2021-11-20 06:34:29,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:34:29,164 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:34:29,181 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c[454,467] [2021-11-20 06:34:29,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:34:29,197 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:34:29,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29 WrapperNode [2021-11-20 06:34:29,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:34:29,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:34:29,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:34:29,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:34:29,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,250 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-11-20 06:34:29,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:34:29,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:34:29,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:34:29,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:34:29,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:34:29,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:34:29,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:34:29,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:34:29,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (1/1) ... [2021-11-20 06:34:29,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:34:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:29,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:34:29,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:34:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:34:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:34:29,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:34:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:34:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-11-20 06:34:29,441 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-11-20 06:34:29,526 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:34:29,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:34:29,652 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:34:29,661 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:34:29,662 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 06:34:29,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:34:29 BoogieIcfgContainer [2021-11-20 06:34:29,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:34:29,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:34:29,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:34:29,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:34:29,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:34:28" (1/3) ... [2021-11-20 06:34:29,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430120c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:34:29, skipping insertion in model container [2021-11-20 06:34:29,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:29" (2/3) ... [2021-11-20 06:34:29,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430120c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:34:29, skipping insertion in model container [2021-11-20 06:34:29,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:34:29" (3/3) ... [2021-11-20 06:34:29,699 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2021-11-20 06:34:29,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:34:29,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:34:29,806 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:34:29,826 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-11-20 06:34:29,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:34:29,849 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) [2021-11-20 06:34:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:34:29,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:29,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:29,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-11-20 06:34:29,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:29,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372474523] [2021-11-20 06:34:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:29,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:30,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:30,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372474523] [2021-11-20 06:34:30,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372474523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:30,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:30,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:34:30,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958102699] [2021-11-20 06:34:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:30,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:34:30,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:34:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:34:30,160 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) [2021-11-20 06:34:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:30,225 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-20 06:34:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:34:30,228 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 [2021-11-20 06:34:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:30,238 INFO L225 Difference]: With dead ends: 28 [2021-11-20 06:34:30,238 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 06:34:30,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:34:30,248 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:30,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:34:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 06:34:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 06:34:30,296 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) [2021-11-20 06:34:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-20 06:34:30,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-20 06:34:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:30,300 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-20 06:34:30,300 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) [2021-11-20 06:34:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-20 06:34:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:34:30,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:30,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:30,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:34:30,303 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-11-20 06:34:30,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:30,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681391832] [2021-11-20 06:34:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:30,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:34:30,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:30,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681391832] [2021-11-20 06:34:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681391832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:30,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801761845] [2021-11-20 06:34:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:30,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:30,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:30,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:34:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:34:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:34:30,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:34:31,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801761845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:31,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:34:31,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2021-11-20 06:34:31,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955513660] [2021-11-20 06:34:31,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:31,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:34:31,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:34:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:34:31,160 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) [2021-11-20 06:34:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:31,231 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-20 06:34:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:34:31,232 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 [2021-11-20 06:34:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:31,235 INFO L225 Difference]: With dead ends: 22 [2021-11-20 06:34:31,236 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 06:34:31,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:34:31,243 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:31,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:34:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 06:34:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-20 06:34:31,259 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) [2021-11-20 06:34:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-20 06:34:31,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-20 06:34:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:31,262 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-20 06:34:31,263 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) [2021-11-20 06:34:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-20 06:34:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:34:31,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:31,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:31,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:31,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:31,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-11-20 06:34:31,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:31,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126587801] [2021-11-20 06:34:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:31,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:31,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:31,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:34:31,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126587801] [2021-11-20 06:34:31,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126587801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:31,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071066626] [2021-11-20 06:34:31,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:34:31,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:31,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:31,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:34:31,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:34:31,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:31,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:34:31,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:34:31,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:34:32,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071066626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:32,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:34:32,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2021-11-20 06:34:32,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432738728] [2021-11-20 06:34:32,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:32,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:34:32,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:34:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:34:32,440 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) [2021-11-20 06:34:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:32,541 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-20 06:34:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:34:32,542 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 [2021-11-20 06:34:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:32,545 INFO L225 Difference]: With dead ends: 25 [2021-11-20 06:34:32,545 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 06:34:32,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:34:32,553 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:32,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:34:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 06:34:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-20 06:34:32,571 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) [2021-11-20 06:34:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-20 06:34:32,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-11-20 06:34:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:32,575 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-20 06:34:32,575 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) [2021-11-20 06:34:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-20 06:34:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:34:32,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:32,580 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:32,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:32,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-11-20 06:34:32,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:32,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455641573] [2021-11-20 06:34:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:32,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:32,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:32,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:32,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:34:33,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455641573] [2021-11-20 06:34:33,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455641573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436902524] [2021-11-20 06:34:33,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:34:33,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:33,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:33,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:33,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:34:33,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:34:33,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:33,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:34:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:34:33,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:34:33,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436902524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:33,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:34:33,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2021-11-20 06:34:33,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289046610] [2021-11-20 06:34:33,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:33,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:34:33,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:34:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:34:33,923 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) [2021-11-20 06:34:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:34,290 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-20 06:34:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:34:34,291 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 [2021-11-20 06:34:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:34,292 INFO L225 Difference]: With dead ends: 39 [2021-11-20 06:34:34,293 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 06:34:34,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:34:34,296 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:34,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:34:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 06:34:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-20 06:34:34,305 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) [2021-11-20 06:34:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-20 06:34:34,306 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-11-20 06:34:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:34,307 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-20 06:34:34,307 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) [2021-11-20 06:34:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-20 06:34:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:34:34,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:34,310 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:34,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:34,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:34,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2021-11-20 06:34:34,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:34,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456600540] [2021-11-20 06:34:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:34,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:34,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:34:35,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:35,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456600540] [2021-11-20 06:34:35,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456600540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:35,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065573743] [2021-11-20 06:34:35,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:34:35,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:35,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:35,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:35,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:34:35,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:34:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:34:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:34:35,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:34:38,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065573743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:38,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:34:38,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2021-11-20 06:34:38,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142729251] [2021-11-20 06:34:38,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:38,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:34:38,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:34:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:34:38,071 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) [2021-11-20 06:34:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:38,286 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-20 06:34:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:34:38,290 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 [2021-11-20 06:34:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:38,296 INFO L225 Difference]: With dead ends: 40 [2021-11-20 06:34:38,296 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:34:38,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:34:38,299 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:38,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 91 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:34:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:34:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 06:34:38,321 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) [2021-11-20 06:34:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-20 06:34:38,327 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-11-20 06:34:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:38,328 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-20 06:34:38,328 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) [2021-11-20 06:34:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-20 06:34:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:34:38,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:38,332 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:38,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:38,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:38,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2021-11-20 06:34:38,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381848867] [2021-11-20 06:34:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:38,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:34:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:34:39,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381848867] [2021-11-20 06:34:39,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381848867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022910659] [2021-11-20 06:34:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:34:39,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:39,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:39,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:34:39,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-20 06:34:39,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:34:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:34:39,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:34:42,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022910659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:42,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:34:42,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 36 [2021-11-20 06:34:42,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874569469] [2021-11-20 06:34:42,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:34:42,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:34:42,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:34:42,585 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) [2021-11-20 06:34:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:43,178 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-11-20 06:34:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:34:43,180 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 [2021-11-20 06:34:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:43,182 INFO L225 Difference]: With dead ends: 48 [2021-11-20 06:34:43,182 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 06:34:43,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=515, Invalid=2677, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 06:34:43,187 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:43,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 127 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:34:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 06:34:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-20 06:34:43,201 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) [2021-11-20 06:34:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-20 06:34:43,206 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 58 [2021-11-20 06:34:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:43,207 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-20 06:34:43,207 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) [2021-11-20 06:34:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-20 06:34:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 06:34:43,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:43,214 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:43,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:43,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:43,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 6 times [2021-11-20 06:34:43,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:43,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376702069] [2021-11-20 06:34:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:43,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:34:43,467 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:34:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:34:43,542 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:34:43,542 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:34:43,544 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:34:43,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:34:43,552 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1] [2021-11-20 06:34:43,558 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:34:43,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:34:43 BoogieIcfgContainer [2021-11-20 06:34:43,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:34:43,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:34:43,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:34:43,631 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:34:43,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:34:29" (3/4) ... [2021-11-20 06:34:43,634 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 06:34:43,691 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:34:43,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:34:43,692 INFO L158 Benchmark]: Toolchain (without parser) took 14816.84ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 58.4MB in the beginning and 125.7MB in the end (delta: -67.3MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-20 06:34:43,693 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 92.3MB. Free memory was 63.3MB in the beginning and 63.3MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:34:43,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.33ms. Allocated memory is still 92.3MB. Free memory was 58.3MB in the beginning and 70.1MB in the end (delta: -11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:34:43,694 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.08ms. Allocated memory is still 92.3MB. Free memory was 70.1MB in the beginning and 68.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:34:43,695 INFO L158 Benchmark]: Boogie Preprocessor took 51.05ms. Allocated memory is still 92.3MB. Free memory was 68.7MB in the beginning and 67.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:34:43,695 INFO L158 Benchmark]: RCFGBuilder took 360.31ms. Allocated memory is still 92.3MB. Free memory was 67.7MB in the beginning and 59.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:34:43,696 INFO L158 Benchmark]: TraceAbstraction took 13949.71ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 59.0MB in the beginning and 128.8MB in the end (delta: -69.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-11-20 06:34:43,697 INFO L158 Benchmark]: Witness Printer took 60.54ms. Allocated memory is still 167.8MB. Free memory was 128.8MB in the beginning and 125.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:34:43,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 92.3MB. Free memory was 63.3MB in the beginning and 63.3MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.33ms. Allocated memory is still 92.3MB. Free memory was 58.3MB in the beginning and 70.1MB in the end (delta: -11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.08ms. Allocated memory is still 92.3MB. Free memory was 70.1MB in the beginning and 68.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.05ms. Allocated memory is still 92.3MB. Free memory was 68.7MB in the beginning and 67.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 360.31ms. Allocated memory is still 92.3MB. Free memory was 67.7MB in the beginning and 59.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 13949.71ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 59.0MB in the beginning and 128.8MB in the end (delta: -69.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Witness Printer took 60.54ms. Allocated memory is still 167.8MB. Free memory was 128.8MB in the beginning and 125.7MB in the end (delta: 3.1MB). 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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; VAL [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) VAL [id(input)=10, input=10] [L13] int result = id(input); [L14] COND TRUE result == 10 VAL [input=10, result=10] [L15] reach_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.8s, OverallIterations: 7, TraceHistogramMax: 11, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 222 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 430 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 369 mSDsCounter, 83 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 377 IncrementalHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 83 mSolverCounterUnsat, 61 mSDtfsCounter, 377 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 491 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2.1s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 432 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 1284 SizeOfPredicates, 13 NumberOfNonLiveVariables, 474 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! [2021-11-20 06:34:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2aa2845-2832-4561-a8ea-a8e07360b9f8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE