./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y --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 68d0cd7d514b491e1404560081afc21267eb1b3dae98cdb9832a8634357d65e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:49:44,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:49:44,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:49:44,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:49:44,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:49:44,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:49:44,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:49:44,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:49:44,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:49:44,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:49:44,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:49:44,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:49:44,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:49:44,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:49:44,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:49:44,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:49:44,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:49:44,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:49:44,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:49:44,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:49:44,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:49:44,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:49:44,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:49:44,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:49:44,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:49:44,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:49:44,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:49:44,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:49:44,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:49:44,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:49:44,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:49:44,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:49:44,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:49:44,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:49:44,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:49:44,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:49:44,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:49:44,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:49:44,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:49:44,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:49:44,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:49:44,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:49:44,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:49:44,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:49:44,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:49:44,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:49:44,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:49:44,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:49:44,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:49:44,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:49:44,659 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:49:44,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:49:44,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:49:44,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:49:44,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:49:44,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:49:44,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:49:44,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:49:44,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:49:44,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:49:44,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:49:44,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:49:44,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:49:44,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:49:44,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:49:44,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:49:44,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:49:44,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:49:44,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:49:44,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:49:44,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:49:44,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:49:44,666 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:49:44,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:49:44,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:49:44,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:49:44,667 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_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68d0cd7d514b491e1404560081afc21267eb1b3dae98cdb9832a8634357d65e4 [2021-11-13 18:49:44,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:49:45,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:49:45,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:49:45,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:49:45,005 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:49:45,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2021-11-13 18:49:45,094 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/data/e8e993820/560a4e868c4d4c4f99c6b37a15dd8557/FLAGe405df360 [2021-11-13 18:49:45,610 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:49:45,611 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2021-11-13 18:49:45,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/data/e8e993820/560a4e868c4d4c4f99c6b37a15dd8557/FLAGe405df360 [2021-11-13 18:49:45,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/data/e8e993820/560a4e868c4d4c4f99c6b37a15dd8557 [2021-11-13 18:49:45,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:49:45,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:49:45,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:49:45,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:49:45,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:49:45,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:49:45" (1/1) ... [2021-11-13 18:49:45,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756f7db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:45, skipping insertion in model container [2021-11-13 18:49:45,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:49:45" (1/1) ... [2021-11-13 18:49:45,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:49:46,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:49:46,208 WARN L228 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_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2021-11-13 18:49:46,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:49:46,221 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:49:46,236 WARN L228 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_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2021-11-13 18:49:46,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:49:46,251 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:49:46,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46 WrapperNode [2021-11-13 18:49:46,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:49:46,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:49:46,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:49:46,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:49:46,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:49:46,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:49:46,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:49:46,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:49:46,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:49:46,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:49:46,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:49:46,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:49:46,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (1/1) ... [2021-11-13 18:49:46,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:49:46,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:46,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:49:46,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:49:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:49:46,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:49:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-11-13 18:49:46,394 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-11-13 18:49:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:49:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:49:46,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:49:46,645 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:49:46,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:46 BoogieIcfgContainer [2021-11-13 18:49:46,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:49:46,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:49:46,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:49:46,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:49:46,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:49:45" (1/3) ... [2021-11-13 18:49:46,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21715fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:49:46, skipping insertion in model container [2021-11-13 18:49:46,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:46" (2/3) ... [2021-11-13 18:49:46,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21715fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:49:46, skipping insertion in model container [2021-11-13 18:49:46,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:46" (3/3) ... [2021-11-13 18:49:46,665 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2021-11-13 18:49:46,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:49:46,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:49:46,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:49:46,761 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 [2021-11-13 18:49:46,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:49:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:49:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:49:46,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:46,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:46,795 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-11-13 18:49:46,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:46,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590363072] [2021-11-13 18:49:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:46,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:47,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:47,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590363072] [2021-11-13 18:49:47,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590363072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:47,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:47,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:49:47,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238109428] [2021-11-13 18:49:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:47,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:47,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:47,169 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:49:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:47,260 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-13 18:49:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:49:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 18:49:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:47,270 INFO L225 Difference]: With dead ends: 25 [2021-11-13 18:49:47,271 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 18:49:47,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:49:47,283 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:47,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 54.27ms Time] [2021-11-13 18:49:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 18:49:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-13 18:49:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:49:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-13 18:49:47,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-13 18:49:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:47,330 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-13 18:49:47,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:49:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-13 18:49:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:49:47,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:47,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:47,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:49:47,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-11-13 18:49:47,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:47,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308330283] [2021-11-13 18:49:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:47,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:49:47,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:47,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308330283] [2021-11-13 18:49:47,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308330283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:47,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223116079] [2021-11-13 18:49:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:47,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:47,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:47,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:47,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:49:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:49:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:49:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:48,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223116079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:48,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:48,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2021-11-13 18:49:48,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154738191] [2021-11-13 18:49:48,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:48,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:49:48,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:49:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:49:48,026 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:49:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:48,084 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-13 18:49:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-11-13 18:49:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:48,089 INFO L225 Difference]: With dead ends: 22 [2021-11-13 18:49:48,089 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:49:48,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:49:48,092 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.84ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:48,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 3.84ms Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 28.84ms Time] [2021-11-13 18:49:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:49:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-13 18:49:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:49:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-13 18:49:48,111 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-13 18:49:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:48,111 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-13 18:49:48,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:49:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-13 18:49:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:49:48,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:48,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:48,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:48,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:48,342 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-11-13 18:49:48,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:48,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241331800] [2021-11-13 18:49:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:48,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:48,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:48,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:48,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:49:48,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:48,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241331800] [2021-11-13 18:49:48,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241331800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:48,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391454209] [2021-11-13 18:49:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:48,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:48,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:48,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:49:48,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:49:48,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:49:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:49:48,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:49:49,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391454209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:49,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2021-11-13 18:49:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159198271] [2021-11-13 18:49:49,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:49:49,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:49:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:49:49,022 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:49:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:49,095 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-13 18:49:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:49:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-11-13 18:49:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:49,097 INFO L225 Difference]: With dead ends: 25 [2021-11-13 18:49:49,097 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 18:49:49,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:49:49,101 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.80ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:49,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 40 Unknown, 0 Unchecked, 3.80ms Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 33.99ms Time] [2021-11-13 18:49:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 18:49:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 18:49:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:49:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-13 18:49:49,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-11-13 18:49:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-13 18:49:49,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:49:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-13 18:49:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:49:49,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:49,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:49,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:49,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-13 18:49:49,334 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-11-13 18:49:49,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:49,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038928067] [2021-11-13 18:49:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:49,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:49:49,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:49,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038928067] [2021-11-13 18:49:49,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038928067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:49,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147413619] [2021-11-13 18:49:49,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:49,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:49,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:49,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:49:49,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:49:49,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:49:49,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:49:49,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:49:50,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147413619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:50,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:50,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2021-11-13 18:49:50,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521775387] [2021-11-13 18:49:50,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:50,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:49:50,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:49:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:49:50,213 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-13 18:49:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:50,279 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-13 18:49:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:49:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2021-11-13 18:49:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:50,281 INFO L225 Difference]: With dead ends: 28 [2021-11-13 18:49:50,281 INFO L226 Difference]: Without dead ends: 24 [2021-11-13 18:49:50,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:49:50,282 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:50,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 32.62ms Time] [2021-11-13 18:49:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-13 18:49:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-13 18:49:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:49:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-13 18:49:50,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-11-13 18:49:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:50,289 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-13 18:49:50,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-13 18:49:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-13 18:49:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:49:50,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:50,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:50,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:50,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:50,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-11-13 18:49:50,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:50,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229060501] [2021-11-13 18:49:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:50,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:49:50,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:50,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229060501] [2021-11-13 18:49:50,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229060501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:50,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211051148] [2021-11-13 18:49:50,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:49:50,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:50,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:50,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:50,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:49:50,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:49:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:49:50,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:49:51,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211051148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:51,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:51,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2021-11-13 18:49:51,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828431510] [2021-11-13 18:49:51,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:51,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:49:51,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:49:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:49:51,629 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-13 18:49:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:51,702 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-13 18:49:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:49:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-11-13 18:49:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:51,704 INFO L225 Difference]: With dead ends: 31 [2021-11-13 18:49:51,704 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 18:49:51,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:49:51,705 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:51,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 33.74ms Time] [2021-11-13 18:49:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 18:49:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-13 18:49:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-13 18:49:51,712 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-11-13 18:49:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:51,712 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-13 18:49:51,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-13 18:49:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-13 18:49:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:49:51,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:51,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:51,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-13 18:49:51,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:51,937 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-11-13 18:49:51,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:51,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142173611] [2021-11-13 18:49:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:51,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:51,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:49:52,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:52,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142173611] [2021-11-13 18:49:52,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142173611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:52,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630002368] [2021-11-13 18:49:52,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:49:52,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:52,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:49:52,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 18:49:52,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:49:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:49:52,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:49:53,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630002368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:53,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:53,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2021-11-13 18:49:53,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886279156] [2021-11-13 18:49:53,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:53,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:49:53,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:49:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:49:53,596 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-13 18:49:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:53,706 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-13 18:49:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:49:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-11-13 18:49:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:53,711 INFO L225 Difference]: With dead ends: 34 [2021-11-13 18:49:53,711 INFO L226 Difference]: Without dead ends: 30 [2021-11-13 18:49:53,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:49:53,713 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:53,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 65 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [16 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 56.66ms Time] [2021-11-13 18:49:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-13 18:49:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-13 18:49:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-13 18:49:53,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-11-13 18:49:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:53,733 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-13 18:49:53,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-13 18:49:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-13 18:49:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:49:53,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:53,736 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:53,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:53,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:49:53,950 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-11-13 18:49:53,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:53,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575078353] [2021-11-13 18:49:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:53,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:53,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 18:49:54,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575078353] [2021-11-13 18:49:54,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575078353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132165400] [2021-11-13 18:49:54,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:49:54,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:54,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:54,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:49:54,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:49:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:49:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 18:49:54,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:49:56,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132165400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:56,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:56,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2021-11-13 18:49:56,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752348801] [2021-11-13 18:49:56,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:56,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:49:56,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:56,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:49:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:49:56,068 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-13 18:49:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:56,231 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-13 18:49:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:49:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2021-11-13 18:49:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:56,236 INFO L225 Difference]: With dead ends: 37 [2021-11-13 18:49:56,236 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:49:56,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:49:56,239 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:56,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 69 Invalid, 105 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [41 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 90.58ms Time] [2021-11-13 18:49:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:49:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-13 18:49:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:49:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-13 18:49:56,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-11-13 18:49:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:56,258 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-13 18:49:56,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-13 18:49:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-13 18:49:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 18:49:56,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:56,262 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:56,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:49:56,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:56,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-11-13 18:49:56,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:56,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382928309] [2021-11-13 18:49:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:56,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-13 18:49:56,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:56,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382928309] [2021-11-13 18:49:56,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382928309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:56,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067794620] [2021-11-13 18:49:56,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:49:56,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:56,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:56,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:56,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:49:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-13 18:49:57,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:49:59,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067794620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:59,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:59,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2021-11-13 18:49:59,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367956065] [2021-11-13 18:49:59,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:59,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:49:59,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:49:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:49:59,186 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-11-13 18:49:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:59,351 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-13 18:49:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:49:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-11-13 18:49:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:59,356 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:49:59,356 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 18:49:59,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:49:59,359 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.19ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:59,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 62 Invalid, 120 Unknown, 0 Unchecked, 4.19ms Time], IncrementalHoareTripleChecker [67 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 81.06ms Time] [2021-11-13 18:49:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 18:49:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-13 18:49:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:49:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-13 18:49:59,374 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-11-13 18:49:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:59,374 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-13 18:49:59,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-11-13 18:49:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-13 18:49:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:49:59,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:59,380 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:59,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:59,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:59,594 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:59,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-11-13 18:49:59,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:59,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614543572] [2021-11-13 18:49:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:59,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:49:59,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:59,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614543572] [2021-11-13 18:49:59,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614543572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:59,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279315259] [2021-11-13 18:49:59,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:59,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:59,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:59,898 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:59,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:50:00,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:50:00,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:00,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:50:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:50:00,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:50:03,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279315259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:03,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:03,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2021-11-13 18:50:03,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105460796] [2021-11-13 18:50:03,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:03,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:50:03,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:50:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:50:03,166 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-13 18:50:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:03,352 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-13 18:50:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:50:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-11-13 18:50:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:03,354 INFO L225 Difference]: With dead ends: 43 [2021-11-13 18:50:03,354 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:50:03,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:50:03,356 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:03,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 81 Invalid, 93 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 75.44ms Time] [2021-11-13 18:50:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:50:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-13 18:50:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:50:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-13 18:50:03,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-11-13 18:50:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:03,373 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-13 18:50:03,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-13 18:50:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-13 18:50:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:50:03,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:03,374 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:03,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:03,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:50:03,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-11-13 18:50:03,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:03,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469964195] [2021-11-13 18:50:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:03,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 18:50:03,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:03,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469964195] [2021-11-13 18:50:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469964195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:03,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882908454] [2021-11-13 18:50:03,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:50:03,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:03,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:03,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:03,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:50:04,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-13 18:50:04,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:04,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:50:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 18:50:04,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:50:08,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882908454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:08,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:08,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2021-11-13 18:50:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264487804] [2021-11-13 18:50:08,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:08,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:50:08,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:50:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:50:08,112 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2021-11-13 18:50:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:08,297 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-13 18:50:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:50:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 64 [2021-11-13 18:50:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:08,299 INFO L225 Difference]: With dead ends: 46 [2021-11-13 18:50:08,299 INFO L226 Difference]: Without dead ends: 42 [2021-11-13 18:50:08,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:50:08,301 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:08,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 90 Invalid, 129 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [46 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 92.45ms Time] [2021-11-13 18:50:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-13 18:50:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-13 18:50:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:50:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-13 18:50:08,309 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-11-13 18:50:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:08,309 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-13 18:50:08,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2021-11-13 18:50:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-13 18:50:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:50:08,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:08,312 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:08,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:08,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:50:08,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-11-13 18:50:08,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:08,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982356006] [2021-11-13 18:50:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:08,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-13 18:50:09,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:09,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982356006] [2021-11-13 18:50:09,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982356006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:09,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729439316] [2021-11-13 18:50:09,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:50:09,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:09,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:09,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:09,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:50:09,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:50:09,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-13 18:50:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 18:50:10,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 18:50:15,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729439316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:15,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:15,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2021-11-13 18:50:15,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708111647] [2021-11-13 18:50:15,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:15,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 18:50:15,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 18:50:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3195, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:50:15,290 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 59 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 36 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 22 states have return successors, (24), 23 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-13 18:50:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:16,848 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-11-13 18:50:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:50:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 36 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 22 states have return successors, (24), 23 states have call predecessors, (24), 7 states have call successors, (24) Word has length 70 [2021-11-13 18:50:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:16,849 INFO L225 Difference]: With dead ends: 45 [2021-11-13 18:50:16,849 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 18:50:16,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=605, Invalid=6535, Unknown=0, NotChecked=0, Total=7140 [2021-11-13 18:50:16,853 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 436.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.74ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 531.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:16,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 429 Invalid, 997 Unknown, 0 Unchecked, 6.74ms Time], IncrementalHoareTripleChecker [99 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 531.70ms Time] [2021-11-13 18:50:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 18:50:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 18:50:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 18:50:16,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2021-11-13 18:50:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:16,855 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 18:50:16,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 36 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 22 states have return successors, (24), 23 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-13 18:50:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 18:50:16,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 18:50:16,858 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:50:16,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:17,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:50:17,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 18:50:17,078 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 18:50:17,078 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| 10)) [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L854 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2021-11-13 18:50:17,079 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2021-11-13 18:50:17,080 INFO L858 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2021-11-13 18:50:17,080 INFO L861 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-11-13 18:50:17,083 INFO L732 BasicCegarLoop]: Path program histogram: [10, 1] [2021-11-13 18:50:17,085 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:50:17,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:50:17 BoogieIcfgContainer [2021-11-13 18:50:17,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:50:17,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:50:17,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:50:17,089 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:50:17,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:46" (3/4) ... [2021-11-13 18:50:17,093 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 18:50:17,100 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-11-13 18:50:17,104 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-13 18:50:17,104 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-13 18:50:17,105 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-13 18:50:17,105 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 18:50:17,133 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:50:17,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:50:17,134 INFO L158 Benchmark]: Toolchain (without parser) took 31158.77ms. Allocated memory was 98.6MB in the beginning and 209.7MB in the end (delta: 111.1MB). Free memory was 60.1MB in the beginning and 132.9MB in the end (delta: -72.8MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2021-11-13 18:50:17,134 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory was 76.3MB in the beginning and 76.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:50:17,135 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.73ms. Allocated memory is still 98.6MB. Free memory was 60.0MB in the beginning and 75.5MB in the end (delta: -15.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:50:17,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.49ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 73.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:50:17,136 INFO L158 Benchmark]: Boogie Preprocessor took 29.73ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.9MB in the end (delta: 887.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:50:17,136 INFO L158 Benchmark]: RCFGBuilder took 330.44ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 63.8MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:50:17,136 INFO L158 Benchmark]: TraceAbstraction took 30439.34ms. Allocated memory was 98.6MB in the beginning and 209.7MB in the end (delta: 111.1MB). Free memory was 63.4MB in the beginning and 135.0MB in the end (delta: -71.6MB). Peak memory consumption was 39.9MB. Max. memory is 16.1GB. [2021-11-13 18:50:17,137 INFO L158 Benchmark]: Witness Printer took 44.41ms. Allocated memory is still 209.7MB. Free memory was 135.0MB in the beginning and 132.9MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:50:17,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory was 76.3MB in the beginning and 76.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.73ms. Allocated memory is still 98.6MB. Free memory was 60.0MB in the beginning and 75.5MB in the end (delta: -15.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.49ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 73.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.73ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.9MB in the end (delta: 887.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 330.44ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 63.8MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 30439.34ms. Allocated memory was 98.6MB in the beginning and 209.7MB in the end (delta: 111.1MB). Free memory was 63.4MB in the beginning and 135.0MB in the end (delta: -71.6MB). Peak memory consumption was 39.9MB. Max. memory is 16.1GB. * Witness Printer took 44.41ms. Allocated memory is still 209.7MB. Free memory was 135.0MB in the beginning and 132.9MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.3s, OverallIterations: 11, TraceHistogramMax: 11, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 715 SdHoareTripleChecker+Valid, 1111.36ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 628 mSDsluCounter, 972 SdHoareTripleChecker+Invalid, 918.90ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 864 mSDsCounter, 321 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1378 IncrementalHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 321 mSolverCounterUnsat, 108 mSDtfsCounter, 1378 mSolverCounterSat, 34.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1165 GetRequests, 867 SyntacticMatches, 14 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, InterpolantAutomatonStates: 125, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 23.4s InterpolantComputationTime, 870 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1269 ConstructedInterpolants, 0 QuantifiedInterpolants, 4527 SizeOfPredicates, 72 NumberOfNonLiveVariables, 1511 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 1646/3630 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-13 18:50:17,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbfc70-de08-4fd1-bdf7-c5868330f0d4/bin/uautomizer-YU5uOKAj3y/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 Result: TRUE