./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be --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 b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:29:34,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:29:34,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:29:34,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:29:34,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:29:34,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:29:34,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:29:34,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:29:34,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:29:34,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:29:34,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:29:34,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:29:34,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:29:34,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:29:34,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:29:34,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:29:34,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:29:34,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:29:34,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:29:34,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:29:34,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:29:34,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:29:34,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:29:34,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:29:34,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:29:34,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:29:34,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:29:34,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:29:34,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:29:34,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:29:34,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:29:34,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:29:34,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:29:34,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:29:34,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:29:34,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:29:34,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:29:34,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:29:34,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:29:34,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:29:34,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:29:34,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:29:34,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:29:34,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:29:34,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:29:34,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:29:34,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:29:34,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:29:34,493 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:29:34,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:29:34,494 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:29:34,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:29:34,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:29:34,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:29:34,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:29:34,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:29:34,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:29:34,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:29:34,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:29:34,497 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:29:34,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:29:34,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:29:34,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:29:34,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:29:34,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:29:34,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:29:34,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:29:34,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:29:34,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:29:34,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:29:34,499 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:29:34,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:29:34,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:29:34,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:29:34,502 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_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 [2021-10-21 19:29:34,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:29:34,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:29:34,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:29:34,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:29:34,775 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:29:34,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2021-10-21 19:29:34,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/data/38659e628/7e748572f9474bcfbf1a254619bf46d5/FLAGab2f5f2bc [2021-10-21 19:29:35,258 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:29:35,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2021-10-21 19:29:35,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/data/38659e628/7e748572f9474bcfbf1a254619bf46d5/FLAGab2f5f2bc [2021-10-21 19:29:35,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/data/38659e628/7e748572f9474bcfbf1a254619bf46d5 [2021-10-21 19:29:35,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:29:35,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:29:35,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:29:35,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:29:35,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:29:35,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4660bacd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35, skipping insertion in model container [2021-10-21 19:29:35,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:29:35,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:29:35,876 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_feb45c85-877a-4e7b-8259-f425c3e677fc/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2021-10-21 19:29:35,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:29:35,888 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:29:35,900 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_feb45c85-877a-4e7b-8259-f425c3e677fc/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2021-10-21 19:29:35,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:29:35,913 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:29:35,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35 WrapperNode [2021-10-21 19:29:35,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:29:35,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:29:35,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:29:35,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:29:35,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:29:35,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:29:35,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:29:35,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:29:35,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:29:35,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:29:35,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:29:35,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:29:35,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (1/1) ... [2021-10-21 19:29:35,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:29:35,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:36,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:36,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:29:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:29:36,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:29:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-10-21 19:29:36,048 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-10-21 19:29:36,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:29:36,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:29:36,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:29:36,211 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 19:29:36,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:29:36 BoogieIcfgContainer [2021-10-21 19:29:36,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:29:36,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:29:36,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:29:36,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:29:36,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:29:35" (1/3) ... [2021-10-21 19:29:36,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245e3114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:29:36, skipping insertion in model container [2021-10-21 19:29:36,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:29:35" (2/3) ... [2021-10-21 19:29:36,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245e3114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:29:36, skipping insertion in model container [2021-10-21 19:29:36,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:29:36" (3/3) ... [2021-10-21 19:29:36,223 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2021-10-21 19:29:36,228 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:29:36,228 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:29:36,272 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:29:36,278 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 [2021-10-21 19:29:36,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:29:36,292 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) [2021-10-21 19:29:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:29:36,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:36,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:36,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-21 19:29:36,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:36,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489893719] [2021-10-21 19:29:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:36,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:29:36,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:36,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489893719] [2021-10-21 19:29:36,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489893719] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:29:36,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:29:36,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:29:36,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983117180] [2021-10-21 19:29:36,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:29:36,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:36,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:29:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:29:36,518 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) [2021-10-21 19:29:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:36,575 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-21 19:29:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:29:36,577 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 [2021-10-21 19:29:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:36,585 INFO L225 Difference]: With dead ends: 25 [2021-10-21 19:29:36,585 INFO L226 Difference]: Without dead ends: 15 [2021-10-21 19:29:36,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:29:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-21 19:29:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-21 19:29:36,642 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) [2021-10-21 19:29:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-21 19:29:36,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-21 19:29:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:36,658 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-21 19:29:36,658 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) [2021-10-21 19:29:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-21 19:29:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:29:36,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:36,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:36,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:29:36,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:36,662 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-21 19:29:36,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:36,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845232678] [2021-10-21 19:29:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:36,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:36,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:29:36,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:36,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845232678] [2021-10-21 19:29:36,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845232678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:36,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261780630] [2021-10-21 19:29:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:36,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:36,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:36,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:29:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:29:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:29:36,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261780630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:36,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:36,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 19:29:36,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95366123] [2021-10-21 19:29:36,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:29:36,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:29:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:29:37,000 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:29:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:37,046 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-21 19:29:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:29:37,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-21 19:29:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:37,048 INFO L225 Difference]: With dead ends: 22 [2021-10-21 19:29:37,048 INFO L226 Difference]: Without dead ends: 18 [2021-10-21 19:29:37,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:29:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-21 19:29:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-21 19:29:37,054 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) [2021-10-21 19:29:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-21 19:29:37,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-21 19:29:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:37,056 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-21 19:29:37,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:29:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-21 19:29:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:29:37,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:37,058 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:37,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-21 19:29:37,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:37,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-21 19:29:37,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:37,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832172932] [2021-10-21 19:29:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:37,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:37,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:37,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:29:37,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832172932] [2021-10-21 19:29:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832172932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454035979] [2021-10-21 19:29:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:29:37,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:37,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:37,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:29:37,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:29:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:29:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:29:37,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454035979] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:37,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:37,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 19:29:37,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881913622] [2021-10-21 19:29:37,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:29:37,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:29:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:29:37,674 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:29:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:37,719 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-21 19:29:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:29:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-21 19:29:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:37,721 INFO L225 Difference]: With dead ends: 25 [2021-10-21 19:29:37,721 INFO L226 Difference]: Without dead ends: 21 [2021-10-21 19:29:37,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:29:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-21 19:29:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-21 19:29:37,726 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) [2021-10-21 19:29:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-21 19:29:37,728 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-21 19:29:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:37,728 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-21 19:29:37,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:29:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-21 19:29:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:29:37,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:37,732 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:37,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:37,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:37,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:37,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-21 19:29:37,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:37,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399724625] [2021-10-21 19:29:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:37,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:29:38,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:38,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399724625] [2021-10-21 19:29:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399724625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:38,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320446636] [2021-10-21 19:29:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:29:38,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:38,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:38,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:38,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:29:38,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:29:38,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:29:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:29:38,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320446636] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:38,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:38,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 19:29:38,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342585784] [2021-10-21 19:29:38,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:29:38,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:29:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:29:38,434 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:29:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:38,517 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-21 19:29:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:29:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2021-10-21 19:29:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:38,520 INFO L225 Difference]: With dead ends: 28 [2021-10-21 19:29:38,520 INFO L226 Difference]: Without dead ends: 24 [2021-10-21 19:29:38,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:29:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-21 19:29:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-21 19:29:38,531 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) [2021-10-21 19:29:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-21 19:29:38,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-21 19:29:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:38,534 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-21 19:29:38,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:29:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-21 19:29:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:29:38,538 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:38,541 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:38,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:38,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:38,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:38,756 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-21 19:29:38,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:38,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476172205] [2021-10-21 19:29:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:38,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:29:38,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:38,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476172205] [2021-10-21 19:29:38,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476172205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:38,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449850810] [2021-10-21 19:29:38,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:29:38,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:38,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:38,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:38,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:29:39,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:29:39,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:29:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:29:39,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449850810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:39,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:39,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-21 19:29:39,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2186949] [2021-10-21 19:29:39,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:29:39,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:29:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:29:39,191 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-21 19:29:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:39,256 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-21 19:29:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:29:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-21 19:29:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:39,259 INFO L225 Difference]: With dead ends: 31 [2021-10-21 19:29:39,260 INFO L226 Difference]: Without dead ends: 27 [2021-10-21 19:29:39,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:29:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-21 19:29:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-21 19:29:39,272 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) [2021-10-21 19:29:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 19:29:39,274 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-21 19:29:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:39,275 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 19:29:39,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-21 19:29:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 19:29:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:29:39,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:39,279 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:39,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:39,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:39,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-21 19:29:39,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:39,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196469155] [2021-10-21 19:29:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:39,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:29:39,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:39,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196469155] [2021-10-21 19:29:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196469155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:39,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057792612] [2021-10-21 19:29:39,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:29:39,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:39,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:39,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:39,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:29:39,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:29:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:29:39,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:29:39,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057792612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:39,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:39,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-21 19:29:39,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511993317] [2021-10-21 19:29:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:29:39,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:29:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:29:39,978 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-21 19:29:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:40,054 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-21 19:29:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:29:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-21 19:29:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:40,055 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:29:40,056 INFO L226 Difference]: Without dead ends: 30 [2021-10-21 19:29:40,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:29:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-21 19:29:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-21 19:29:40,060 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) [2021-10-21 19:29:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-21 19:29:40,061 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-21 19:29:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:40,062 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-21 19:29:40,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-21 19:29:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-21 19:29:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:29:40,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:40,064 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:40,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:40,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:40,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-21 19:29:40,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:40,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725335442] [2021-10-21 19:29:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:40,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-21 19:29:40,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:40,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725335442] [2021-10-21 19:29:40,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725335442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:40,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870272833] [2021-10-21 19:29:40,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:29:40,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:40,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:40,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:29:40,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 19:29:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:29:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-21 19:29:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870272833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:40,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:40,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 19:29:40,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769622574] [2021-10-21 19:29:40,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:29:40,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:29:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:29:40,739 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-21 19:29:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:40,819 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-21 19:29:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:29:40,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2021-10-21 19:29:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:40,821 INFO L225 Difference]: With dead ends: 37 [2021-10-21 19:29:40,821 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:29:40,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:29:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:29:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-21 19:29:40,826 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) [2021-10-21 19:29:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-21 19:29:40,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-21 19:29:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:40,827 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-21 19:29:40,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-21 19:29:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-21 19:29:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:29:40,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:40,829 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:40,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:41,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:29:41,035 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-21 19:29:41,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:41,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15905723] [2021-10-21 19:29:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:41,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-21 19:29:41,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:41,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15905723] [2021-10-21 19:29:41,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15905723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:41,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620909784] [2021-10-21 19:29:41,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:29:41,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:41,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:41,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:41,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:29:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:29:41,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-21 19:29:41,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620909784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:41,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:41,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-21 19:29:41,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980307792] [2021-10-21 19:29:41,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:29:41,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:29:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:29:41,566 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-21 19:29:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:41,658 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-21 19:29:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:29:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-21 19:29:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:41,659 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:29:41,660 INFO L226 Difference]: Without dead ends: 36 [2021-10-21 19:29:41,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:29:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-21 19:29:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-21 19:29:41,664 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) [2021-10-21 19:29:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-21 19:29:41,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-21 19:29:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:41,666 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-21 19:29:41,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-21 19:29:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-21 19:29:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:29:41,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:41,668 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:41,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:41,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:29:41,883 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-21 19:29:41,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:41,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359745248] [2021-10-21 19:29:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:41,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 19:29:42,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:42,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359745248] [2021-10-21 19:29:42,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359745248] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:42,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827947531] [2021-10-21 19:29:42,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:29:42,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:42,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:42,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:42,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:29:42,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:29:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:29:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 19:29:42,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827947531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:42,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:42,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-21 19:29:42,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186714241] [2021-10-21 19:29:42,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:29:42,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:29:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:29:42,517 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-21 19:29:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:42,634 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-21 19:29:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:29:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-21 19:29:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:42,635 INFO L225 Difference]: With dead ends: 43 [2021-10-21 19:29:42,635 INFO L226 Difference]: Without dead ends: 39 [2021-10-21 19:29:42,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:29:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-21 19:29:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-21 19:29:42,639 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) [2021-10-21 19:29:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-21 19:29:42,640 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-21 19:29:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:42,640 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-21 19:29:42,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-21 19:29:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-21 19:29:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:29:42,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:42,642 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:42,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:42,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:42,851 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-21 19:29:42,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:42,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478756541] [2021-10-21 19:29:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:42,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:42,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-21 19:29:43,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:43,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478756541] [2021-10-21 19:29:43,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478756541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:43,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122282030] [2021-10-21 19:29:43,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:29:43,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:43,118 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:43,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:29:43,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 19:29:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:29:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-21 19:29:43,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122282030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:43,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:43,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-21 19:29:43,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32721653] [2021-10-21 19:29:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:29:43,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:29:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:29:43,526 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-21 19:29:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:43,633 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-21 19:29:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:29:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) Word has length 64 [2021-10-21 19:29:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:43,634 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:29:43,634 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 19:29:43,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:29:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 19:29:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-21 19:29:43,639 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) [2021-10-21 19:29:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-21 19:29:43,640 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-21 19:29:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:43,640 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-21 19:29:43,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-21 19:29:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-21 19:29:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:29:43,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:43,642 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:43,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:43,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:29:43,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-21 19:29:43,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:43,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499148353] [2021-10-21 19:29:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:43,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:43,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-21 19:29:44,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:44,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499148353] [2021-10-21 19:29:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499148353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:44,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909790780] [2021-10-21 19:29:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:29:44,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:44,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:44,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:29:44,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:29:44,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:29:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-21 19:29:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909790780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:44,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:44,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-21 19:29:44,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178667575] [2021-10-21 19:29:44,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:29:44,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:29:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:29:44,596 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-21 19:29:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:44,710 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-21 19:29:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:29:44,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-10-21 19:29:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:44,712 INFO L225 Difference]: With dead ends: 49 [2021-10-21 19:29:44,712 INFO L226 Difference]: Without dead ends: 45 [2021-10-21 19:29:44,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:29:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-21 19:29:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-21 19:29:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-21 19:29:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-21 19:29:44,717 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-10-21 19:29:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:44,718 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-21 19:29:44,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-21 19:29:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-21 19:29:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:29:44,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:44,719 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:44,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:44,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:44,943 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:44,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-10-21 19:29:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:44,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289285957] [2021-10-21 19:29:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:44,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-21 19:29:45,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:45,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289285957] [2021-10-21 19:29:45,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289285957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:45,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345670930] [2021-10-21 19:29:45,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:29:45,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:45,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:45,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:29:45,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-21 19:29:45,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:29:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-21 19:29:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345670930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:45,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:45,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-21 19:29:45,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484048910] [2021-10-21 19:29:45,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:29:45,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:29:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:29:45,781 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-21 19:29:45,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:45,966 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-21 19:29:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:29:45,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-10-21 19:29:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:45,968 INFO L225 Difference]: With dead ends: 52 [2021-10-21 19:29:45,968 INFO L226 Difference]: Without dead ends: 48 [2021-10-21 19:29:45,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:29:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-21 19:29:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-21 19:29:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-10-21 19:29:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-21 19:29:45,976 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-10-21 19:29:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:45,977 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-21 19:29:45,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-21 19:29:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-21 19:29:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:29:45,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:45,979 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:46,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:29:46,207 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-10-21 19:29:46,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:46,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55356315] [2021-10-21 19:29:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:46,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-21 19:29:46,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:46,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55356315] [2021-10-21 19:29:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55356315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:46,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093480946] [2021-10-21 19:29:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:29:46,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:46,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:46,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:46,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:29:46,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-21 19:29:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:29:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-21 19:29:47,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093480946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:47,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:47,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-21 19:29:47,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17507805] [2021-10-21 19:29:47,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:29:47,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:29:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:29:47,190 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-21 19:29:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:47,343 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-21 19:29:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:29:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-10-21 19:29:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:47,345 INFO L225 Difference]: With dead ends: 55 [2021-10-21 19:29:47,345 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:29:47,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:29:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:29:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-21 19:29:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-21 19:29:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-21 19:29:47,351 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-10-21 19:29:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:47,352 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-21 19:29:47,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-21 19:29:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-21 19:29:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-21 19:29:47,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:47,353 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:47,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:47,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:29:47,578 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-10-21 19:29:47,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:47,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699467733] [2021-10-21 19:29:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:47,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-21 19:29:48,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:48,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699467733] [2021-10-21 19:29:48,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699467733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:48,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869907579] [2021-10-21 19:29:48,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:29:48,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:48,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:48,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:48,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:29:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:48,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:29:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-21 19:29:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869907579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:48,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-21 19:29:48,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048673059] [2021-10-21 19:29:48,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:29:48,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:29:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:29:48,590 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-21 19:29:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:48,745 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-21 19:29:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:29:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-10-21 19:29:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:48,747 INFO L225 Difference]: With dead ends: 58 [2021-10-21 19:29:48,747 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:29:48,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:29:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:29:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-21 19:29:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-10-21 19:29:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-21 19:29:48,755 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-10-21 19:29:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:48,756 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-21 19:29:48,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-21 19:29:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-21 19:29:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 19:29:48,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:48,758 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:48,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:48,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:48,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-10-21 19:29:48,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:48,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110999412] [2021-10-21 19:29:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:48,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-21 19:29:49,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:49,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110999412] [2021-10-21 19:29:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110999412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:49,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274913306] [2021-10-21 19:29:49,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:29:49,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:49,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:49,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:29:49,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:29:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:29:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-21 19:29:50,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274913306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:50,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:50,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-21 19:29:50,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979511087] [2021-10-21 19:29:50,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:29:50,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:29:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:29:50,066 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-21 19:29:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:50,250 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-21 19:29:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:29:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-10-21 19:29:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:50,251 INFO L225 Difference]: With dead ends: 61 [2021-10-21 19:29:50,252 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:29:50,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:29:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:29:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-21 19:29:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-21 19:29:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-21 19:29:50,258 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-10-21 19:29:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:50,259 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-21 19:29:50,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-21 19:29:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-21 19:29:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:29:50,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:29:50,261 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:29:50,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:50,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:29:50,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:29:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-10-21 19:29:50,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:50,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903521244] [2021-10-21 19:29:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:50,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:50,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:50,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:50,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:29:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-10-21 19:29:51,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:51,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903521244] [2021-10-21 19:29:51,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903521244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:51,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885021074] [2021-10-21 19:29:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:29:51,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:51,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:51,815 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:51,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:29:52,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-21 19:29:52,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 137 conjunts are in the unsatisfiable core [2021-10-21 19:29:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-10-21 19:29:54,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885021074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:54,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:54,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2021-10-21 19:29:54,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505658055] [2021-10-21 19:29:54,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-10-21 19:29:54,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-10-21 19:29:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5037, Unknown=0, NotChecked=0, Total=5402 [2021-10-21 19:29:54,325 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 74 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 42 states have internal predecessors, (78), 6 states have call successors, (6), 1 states have call predecessors, (6), 31 states have return successors, (32), 32 states have call predecessors, (32), 6 states have call successors, (32) [2021-10-21 19:29:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:57,091 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-21 19:29:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 19:29:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 42 states have internal predecessors, (78), 6 states have call successors, (6), 1 states have call predecessors, (6), 31 states have return successors, (32), 32 states have call predecessors, (32), 6 states have call successors, (32) Word has length 100 [2021-10-21 19:29:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:29:57,093 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:29:57,093 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:29:57,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 3959.3ms TimeCoverageRelationStatistics Valid=915, Invalid=11075, Unknown=0, NotChecked=0, Total=11990 [2021-10-21 19:29:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:29:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:29:57,097 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) [2021-10-21 19:29:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:29:57,097 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-10-21 19:29:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:29:57,097 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:29:57,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 42 states have internal predecessors, (78), 6 states have call successors, (6), 1 states have call predecessors, (6), 31 states have return successors, (32), 32 states have call predecessors, (32), 6 states have call successors, (32) [2021-10-21 19:29:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:29:57,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:29:57,100 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:29:57,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 19:29:57,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:29:57,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:29:57,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:29:57,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:29:57,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:29:57,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:29:57,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:29:57,344 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:29:57,344 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:29:57,344 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:29:57,344 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:29:57,344 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-10-21 19:29:57,344 INFO L857 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2021-10-21 19:29:57,345 INFO L857 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-10-21 19:29:57,345 INFO L853 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 0) (= ULTIMATE.start_main_~a~0 15)) [2021-10-21 19:29:57,345 INFO L857 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-10-21 19:29:57,345 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-10-21 19:29:57,345 INFO L857 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2021-10-21 19:29:57,346 INFO L853 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)) [2021-10-21 19:29:57,346 INFO L857 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2021-10-21 19:29:57,346 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2021-10-21 19:29:57,346 INFO L857 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2021-10-21 19:29:57,346 INFO L860 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-10-21 19:29:57,355 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:29:57,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:29:57 BoogieIcfgContainer [2021-10-21 19:29:57,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:29:57,364 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:29:57,364 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:29:57,364 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:29:57,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:29:36" (3/4) ... [2021-10-21 19:29:57,367 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:29:57,385 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-10-21 19:29:57,397 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-21 19:29:57,410 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-21 19:29:57,410 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:29:57,410 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:29:57,444 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:29:57,445 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:29:57,446 INFO L168 Benchmark]: Toolchain (without parser) took 21782.13 ms. Allocated memory was 96.5 MB in the beginning and 220.2 MB in the end (delta: 123.7 MB). Free memory was 64.8 MB in the beginning and 164.8 MB in the end (delta: -100.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:57,447 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory is still 50.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:29:57,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.77 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.8 MB in the beginning and 92.6 MB in the end (delta: -27.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:57,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.51 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:57,448 INFO L168 Benchmark]: Boogie Preprocessor took 17.18 ms. Allocated memory is still 117.4 MB. Free memory was 91.3 MB in the beginning and 90.5 MB in the end (delta: 791.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:29:57,449 INFO L168 Benchmark]: RCFGBuilder took 256.02 ms. Allocated memory is still 117.4 MB. Free memory was 90.1 MB in the beginning and 81.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:57,449 INFO L168 Benchmark]: TraceAbstraction took 21147.47 ms. Allocated memory was 117.4 MB in the beginning and 220.2 MB in the end (delta: 102.8 MB). Free memory was 80.9 MB in the beginning and 166.9 MB in the end (delta: -86.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:57,450 INFO L168 Benchmark]: Witness Printer took 80.79 ms. Allocated memory is still 220.2 MB. Free memory was 166.9 MB in the beginning and 164.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:57,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory is still 50.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.77 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.8 MB in the beginning and 92.6 MB in the end (delta: -27.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.51 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.18 ms. Allocated memory is still 117.4 MB. Free memory was 91.3 MB in the beginning and 90.5 MB in the end (delta: 791.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 256.02 ms. Allocated memory is still 117.4 MB. Free memory was 90.1 MB in the beginning and 81.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21147.47 ms. Allocated memory was 117.4 MB in the beginning and 220.2 MB in the end (delta: 102.8 MB). Free memory was 80.9 MB in the beginning and 166.9 MB in the end (delta: -86.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * Witness Printer took 80.79 ms. Allocated memory is still 220.2 MB. Free memory was 166.9 MB in the beginning and 164.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 21080.5ms, OverallIterations: 16, TraceHistogramMax: 16, EmptinessCheckTime: 30.2ms, AutomataDifference: 4408.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 42.6ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 158 SDtfs, 476 SDslu, 1372 SDs, 0 SdLazy, 2229 SolverSat, 213 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1227.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1485 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 5771.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.0ms AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 25.3ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 10.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 149.4ms SsaConstructionTime, 771.5ms SatisfiabilityAnalysisTime, 9982.8ms InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1719 ConstructedInterpolants, 0 QuantifiedInterpolants, 5293 SizeOfPredicates, 140 NumberOfNonLiveVariables, 3015 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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! [2021-10-21 19:29:57,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feb45c85-877a-4e7b-8259-f425c3e677fc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...