./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa --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 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:15:48,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:15:48,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:15:48,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:15:48,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:15:48,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:15:48,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:15:48,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:15:48,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:15:48,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:15:48,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:15:48,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:15:48,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:15:48,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:15:48,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:15:48,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:15:48,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:15:48,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:15:48,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:15:48,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:15:48,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:15:48,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:15:48,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:15:48,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:15:48,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:15:48,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:15:48,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:15:48,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:15:48,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:15:48,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:15:48,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:15:48,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:15:48,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:15:48,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:15:48,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:15:48,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:15:48,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:15:48,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:15:48,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:15:48,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:15:48,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:15:48,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:15:48,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:15:48,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:15:48,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:15:48,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:15:48,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:15:48,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:15:48,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:15:48,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:15:48,601 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:15:48,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:15:48,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:15:48,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:15:48,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:15:48,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:15:48,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:15:48,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:15:48,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:15:48,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:15:48,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:15:48,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:15:48,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:15:48,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:15:48,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:15:48,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:15:48,604 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:15:48,604 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:15:48,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:15:48,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:15:48,604 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_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f [2021-12-06 17:15:48,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:15:48,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:15:48,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:15:48,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:15:48,820 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:15:48,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2021-12-06 17:15:48,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/data/a8cbe86f9/6ba090e813d4477bac085345dd621f9f/FLAGe4239026e [2021-12-06 17:15:49,246 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:15:49,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2021-12-06 17:15:49,252 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/data/a8cbe86f9/6ba090e813d4477bac085345dd621f9f/FLAGe4239026e [2021-12-06 17:15:49,261 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/data/a8cbe86f9/6ba090e813d4477bac085345dd621f9f [2021-12-06 17:15:49,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:15:49,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:15:49,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:15:49,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:15:49,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:15:49,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e67e815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49, skipping insertion in model container [2021-12-06 17:15:49,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:15:49,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:15:49,403 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_15aaaa56-1e21-4ab7-86e5-d774607f59a9/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c[946,959] [2021-12-06 17:15:49,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:15:49,421 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:15:49,434 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_15aaaa56-1e21-4ab7-86e5-d774607f59a9/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c[946,959] [2021-12-06 17:15:49,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:15:49,444 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:15:49,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49 WrapperNode [2021-12-06 17:15:49,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:15:49,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:15:49,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:15:49,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:15:49,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,468 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-06 17:15:49,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:15:49,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:15:49,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:15:49,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:15:49,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:15:49,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:15:49,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:15:49,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:15:49,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (1/1) ... [2021-12-06 17:15:49,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:15:49,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:49,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:15:49,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:15:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:15:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:15:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-06 17:15:49,568 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-06 17:15:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-06 17:15:49,568 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-06 17:15:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:15:49,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:15:49,624 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:15:49,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:15:49,698 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:15:49,703 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:15:49,703 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 17:15:49,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:15:49 BoogieIcfgContainer [2021-12-06 17:15:49,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:15:49,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:15:49,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:15:49,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:15:49,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:15:49" (1/3) ... [2021-12-06 17:15:49,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a54a95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:15:49, skipping insertion in model container [2021-12-06 17:15:49,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:15:49" (2/3) ... [2021-12-06 17:15:49,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a54a95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:15:49, skipping insertion in model container [2021-12-06 17:15:49,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:15:49" (3/3) ... [2021-12-06 17:15:49,711 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2021-12-06 17:15:49,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:15:49,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:15:49,755 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:15:49,761 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 [2021-12-06 17:15:49,761 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:15:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:15:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:15:49,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:49,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:49,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-06 17:15:49,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:49,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679353235] [2021-12-06 17:15:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:49,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:49,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:15:49,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679353235] [2021-12-06 17:15:49,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679353235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:15:49,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:15:49,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:15:49,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791239350] [2021-12-06 17:15:49,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:15:49,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:15:49,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:15:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:15:50,003 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2021-12-06 17:15:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:50,043 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-12-06 17:15:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:15:50,046 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 [2021-12-06 17:15:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:50,054 INFO L225 Difference]: With dead ends: 43 [2021-12-06 17:15:50,055 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 17:15:50,057 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 [2021-12-06 17:15:50,061 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:50,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:15:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 17:15:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 17:15:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 17:15:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-06 17:15:50,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-12-06 17:15:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:50,099 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-06 17:15:50,100 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) [2021-12-06 17:15:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-06 17:15:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:15:50,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:50,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:50,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:15:50,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-12-06 17:15:50,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:50,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587915089] [2021-12-06 17:15:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:50,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:15:50,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587915089] [2021-12-06 17:15:50,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587915089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:15:50,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:15:50,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:15:50,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041368416] [2021-12-06 17:15:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:15:50,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:15:50,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:15:50,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:15:50,161 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-06 17:15:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:50,178 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-12-06 17:15:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:15:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2021-12-06 17:15:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:50,180 INFO L225 Difference]: With dead ends: 33 [2021-12-06 17:15:50,180 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 17:15:50,181 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 [2021-12-06 17:15:50,183 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:50,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:15:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 17:15:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-06 17:15:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 17:15:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-06 17:15:50,192 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-12-06 17:15:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:50,193 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-06 17:15:50,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-06 17:15:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-06 17:15:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:15:50,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:50,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:50,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:15:50,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-12-06 17:15:50,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:50,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279268846] [2021-12-06 17:15:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:50,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:15:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:15:50,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279268846] [2021-12-06 17:15:50,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279268846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:50,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128537634] [2021-12-06 17:15:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:50,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:50,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:50,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:15:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:50,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:15:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:15:50,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:15:50,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128537634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:50,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:50,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-12-06 17:15:50,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215980197] [2021-12-06 17:15:50,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:50,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:15:50,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:15:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:15:50,584 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:15:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:50,686 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-12-06 17:15:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:15:50,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-12-06 17:15:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:50,688 INFO L225 Difference]: With dead ends: 55 [2021-12-06 17:15:50,688 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 17:15:50,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:15:50,690 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:50,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:15:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 17:15:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-06 17:15:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 17:15:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-06 17:15:50,699 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-12-06 17:15:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:50,699 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-06 17:15:50,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:15:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-06 17:15:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:15:50,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:50,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:50,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:15:50,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 17:15:50,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-12-06 17:15:50,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168571283] [2021-12-06 17:15:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:50,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:15:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:15:51,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:51,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168571283] [2021-12-06 17:15:51,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168571283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:51,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200360580] [2021-12-06 17:15:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:51,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:51,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:51,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:51,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:15:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:15:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:15:51,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:15:51,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200360580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:51,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:51,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-06 17:15:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678212893] [2021-12-06 17:15:51,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:51,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:15:51,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:15:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:15:51,271 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 17:15:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:51,346 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-12-06 17:15:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:15:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-12-06 17:15:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:51,348 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:15:51,349 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 17:15:51,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:15:51,350 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:51,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:15:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 17:15:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-06 17:15:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-06 17:15:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-12-06 17:15:51,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-12-06 17:15:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:51,358 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-12-06 17:15:51,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 17:15:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-12-06 17:15:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:15:51,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:51,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:51,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:15:51,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:51,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-12-06 17:15:51,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:51,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453343956] [2021-12-06 17:15:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:51,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:15:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 17:15:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:15:51,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:51,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453343956] [2021-12-06 17:15:51,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453343956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:51,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491639384] [2021-12-06 17:15:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:51,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:51,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:51,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:15:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:51,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:15:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:15:51,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:15:52,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491639384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:52,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:52,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-12-06 17:15:52,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112258052] [2021-12-06 17:15:52,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:52,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:15:52,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:15:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:15:52,017 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-06 17:15:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:52,137 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-12-06 17:15:52,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:15:52,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-12-06 17:15:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:52,139 INFO L225 Difference]: With dead ends: 105 [2021-12-06 17:15:52,139 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 17:15:52,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:15:52,141 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:52,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 118 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:15:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 17:15:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 17:15:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-06 17:15:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-12-06 17:15:52,150 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-12-06 17:15:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-12-06 17:15:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-06 17:15:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-12-06 17:15:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:15:52,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:52,152 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:52,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:15:52,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:52,354 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-12-06 17:15:52,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036348015] [2021-12-06 17:15:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:52,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:15:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:15:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:15:52,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036348015] [2021-12-06 17:15:52,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036348015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225655816] [2021-12-06 17:15:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:52,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:52,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:52,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:15:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:15:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:15:52,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:15:52,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225655816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:52,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:52,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2021-12-06 17:15:52,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840651208] [2021-12-06 17:15:52,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:52,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:15:52,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:15:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:15:52,739 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 17:15:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:52,966 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-12-06 17:15:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:15:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 37 [2021-12-06 17:15:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:52,970 INFO L225 Difference]: With dead ends: 177 [2021-12-06 17:15:52,970 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 17:15:52,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:15:52,974 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:52,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 257 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:15:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 17:15:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-12-06 17:15:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-12-06 17:15:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-12-06 17:15:52,996 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-12-06 17:15:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:52,996 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-12-06 17:15:52,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 17:15:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-12-06 17:15:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:15:53,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:53,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:53,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:15:53,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:53,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-12-06 17:15:53,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:53,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517209660] [2021-12-06 17:15:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:53,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:15:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:15:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 17:15:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:15:53,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517209660] [2021-12-06 17:15:53,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517209660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001812736] [2021-12-06 17:15:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:53,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:53,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:53,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:15:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:15:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:15:53,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:15:53,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001812736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:53,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:53,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2021-12-06 17:15:53,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172971544] [2021-12-06 17:15:53,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:53,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:15:53,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:15:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:15:53,641 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2021-12-06 17:15:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:53,785 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2021-12-06 17:15:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:15:53,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 51 [2021-12-06 17:15:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:53,788 INFO L225 Difference]: With dead ends: 262 [2021-12-06 17:15:53,788 INFO L226 Difference]: Without dead ends: 162 [2021-12-06 17:15:53,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:15:53,789 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:53,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 183 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:15:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-06 17:15:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2021-12-06 17:15:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2021-12-06 17:15:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2021-12-06 17:15:53,808 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2021-12-06 17:15:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:53,809 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2021-12-06 17:15:53,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2021-12-06 17:15:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2021-12-06 17:15:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:15:53,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:53,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:53,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:15:54,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:15:54,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2021-12-06 17:15:54,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:54,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740424235] [2021-12-06 17:15:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:54,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:15:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:15:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 17:15:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:15:54,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:54,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740424235] [2021-12-06 17:15:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740424235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770494390] [2021-12-06 17:15:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:54,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:54,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:54,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:54,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:15:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:15:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 17:15:54,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 17:15:54,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770494390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:54,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:54,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2021-12-06 17:15:54,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341462222] [2021-12-06 17:15:54,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:54,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:15:54,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:15:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:15:54,396 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-06 17:15:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:54,549 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2021-12-06 17:15:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:15:54,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2021-12-06 17:15:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:54,552 INFO L225 Difference]: With dead ends: 301 [2021-12-06 17:15:54,552 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 17:15:54,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:15:54,555 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:54,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:15:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 17:15:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-12-06 17:15:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2021-12-06 17:15:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2021-12-06 17:15:54,568 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2021-12-06 17:15:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:54,569 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2021-12-06 17:15:54,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-06 17:15:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2021-12-06 17:15:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:15:54,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:54,571 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:54,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:15:54,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:54,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash -492645000, now seen corresponding path program 2 times [2021-12-06 17:15:54,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:54,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956034978] [2021-12-06 17:15:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:54,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:15:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:15:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:15:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 17:15:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:54,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:15:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:55,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:15:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:15:55,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956034978] [2021-12-06 17:15:55,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956034978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:55,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863030596] [2021-12-06 17:15:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:15:55,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:55,028 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:55,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:15:55,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:15:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:15:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:15:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 17:15:55,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 17:15:55,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863030596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:55,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:55,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2021-12-06 17:15:55,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71980427] [2021-12-06 17:15:55,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:55,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:15:55,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:15:55,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:15:55,365 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2021-12-06 17:15:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:15:55,568 INFO L93 Difference]: Finished difference Result 171 states and 290 transitions. [2021-12-06 17:15:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:15:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) Word has length 66 [2021-12-06 17:15:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:15:55,571 INFO L225 Difference]: With dead ends: 171 [2021-12-06 17:15:55,571 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 17:15:55,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:15:55,573 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:15:55,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 209 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:15:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 17:15:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2021-12-06 17:15:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (31), 16 states have call predecessors, (31), 12 states have call successors, (31) [2021-12-06 17:15:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2021-12-06 17:15:55,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 66 [2021-12-06 17:15:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:15:55,588 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2021-12-06 17:15:55,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2021-12-06 17:15:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2021-12-06 17:15:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:15:55,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:15:55,590 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:55,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:15:55,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:55,791 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:15:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2021-12-06 17:15:55,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:55,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286033302] [2021-12-06 17:15:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:55,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:15:55,802 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:15:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:15:55,827 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:15:55,827 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 17:15:55,828 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 17:15:55,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:15:55,832 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:55,834 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 17:15:55,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 05:15:55 BoogieIcfgContainer [2021-12-06 17:15:55,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 17:15:55,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 17:15:55,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 17:15:55,859 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 17:15:55,859 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:15:49" (3/4) ... [2021-12-06 17:15:55,860 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 17:15:55,890 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 17:15:55,891 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 17:15:55,891 INFO L158 Benchmark]: Toolchain (without parser) took 6627.57ms. Allocated memory was 86.0MB in the beginning and 161.5MB in the end (delta: 75.5MB). Free memory was 44.1MB in the beginning and 124.9MB in the end (delta: -80.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:15:55,891 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 86.0MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:15:55,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.66ms. Allocated memory was 86.0MB in the beginning and 134.2MB in the end (delta: 48.2MB). Free memory was 43.9MB in the beginning and 112.4MB in the end (delta: -68.6MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-12-06 17:15:55,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.97ms. Allocated memory is still 134.2MB. Free memory was 112.4MB in the beginning and 110.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:15:55,892 INFO L158 Benchmark]: Boogie Preprocessor took 15.67ms. Allocated memory is still 134.2MB. Free memory was 110.6MB in the beginning and 109.7MB in the end (delta: 919.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:15:55,892 INFO L158 Benchmark]: RCFGBuilder took 218.94ms. Allocated memory is still 134.2MB. Free memory was 109.7MB in the beginning and 106.9MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 17:15:55,893 INFO L158 Benchmark]: TraceAbstraction took 6152.71ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 106.3MB in the beginning and 128.1MB in the end (delta: -21.8MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-06 17:15:55,893 INFO L158 Benchmark]: Witness Printer took 31.83ms. Allocated memory is still 161.5MB. Free memory was 128.1MB in the beginning and 124.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:15:55,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 86.0MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.66ms. Allocated memory was 86.0MB in the beginning and 134.2MB in the end (delta: 48.2MB). Free memory was 43.9MB in the beginning and 112.4MB in the end (delta: -68.6MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.97ms. Allocated memory is still 134.2MB. Free memory was 112.4MB in the beginning and 110.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.67ms. Allocated memory is still 134.2MB. Free memory was 110.6MB in the beginning and 109.7MB in the end (delta: 919.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 218.94ms. Allocated memory is still 134.2MB. Free memory was 109.7MB in the beginning and 106.9MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 6152.71ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 106.3MB in the beginning and 128.1MB in the end (delta: -21.8MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Witness Printer took 31.83ms. Allocated memory is still 161.5MB. Free memory was 128.1MB in the beginning and 124.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 4; VAL [x=4] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L39] int result = fibo1(x); [L40] COND TRUE result == 3 VAL [result=3, x=4] [L41] reach_error() VAL [result=3, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 447 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 385 mSDsluCounter, 1426 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1180 mSDsCounter, 347 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1761 IncrementalHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 347 mSolverCounterUnsat, 246 mSDtfsCounter, 1761 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 618 SyntacticMatches, 17 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, InterpolantAutomatonStates: 111, 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, 9 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 664 NumberOfCodeBlocks, 664 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 865 ConstructedInterpolants, 0 QuantifiedInterpolants, 1877 SizeOfPredicates, 18 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 494/648 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! [2021-12-06 17:15:55,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15aaaa56-1e21-4ab7-86e5-d774607f59a9/bin/uautomizer-DrprNOufMa/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