./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer --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 c66b9d1e2f6d9fc677cf33b6edee94991686d987 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:58:38,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:58:38,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:58:38,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:58:38,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:58:38,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:58:38,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:58:38,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:58:38,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:58:38,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:58:38,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:58:38,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:58:38,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:58:38,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:58:38,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:58:38,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:58:38,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:58:38,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:58:38,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:58:38,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:58:38,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:58:38,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:58:38,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:58:38,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:58:38,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:58:38,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:58:38,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:58:38,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:58:38,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:58:38,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:58:38,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:58:38,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:58:38,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:58:38,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:58:38,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:58:38,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:58:38,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:58:38,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:58:38,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:58:38,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:58:38,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:58:38,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:58:38,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:58:38,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:58:38,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:58:38,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:58:38,987 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:58:38,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:58:38,988 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:58:38,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:58:38,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:58:38,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:58:38,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:58:38,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:58:38,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:58:38,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:58:38,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:58:38,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:58:38,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:58:38,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:58:38,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:58:38,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:58:38,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:58:38,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:58:38,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:58:38,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:58:38,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:58:38,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:58:38,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:58:38,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:58:38,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:58:38,994 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-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c66b9d1e2f6d9fc677cf33b6edee94991686d987 [2020-11-30 00:58:39,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:58:39,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:58:39,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:58:39,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:58:39,398 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:58:39,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2020-11-30 00:58:39,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/data/5b675f5df/361bed78e67f4a538b304ae7d7c87179/FLAG77e7c26b3 [2020-11-30 00:58:40,022 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:58:40,023 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2020-11-30 00:58:40,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/data/5b675f5df/361bed78e67f4a538b304ae7d7c87179/FLAG77e7c26b3 [2020-11-30 00:58:40,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/data/5b675f5df/361bed78e67f4a538b304ae7d7c87179 [2020-11-30 00:58:40,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:58:40,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:58:40,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:58:40,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:58:40,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:58:40,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5891dde0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40, skipping insertion in model container [2020-11-30 00:58:40,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:58:40,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:58:40,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:58:40,622 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:58:40,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:58:40,651 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:58:40,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40 WrapperNode [2020-11-30 00:58:40,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:58:40,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:58:40,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:58:40,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:58:40,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:58:40,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:58:40,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:58:40,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:58:40,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... [2020-11-30 00:58:40,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:58:40,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:58:40,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:58:40,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:58:40,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:58:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:58:40,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:58:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:58:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 00:58:40,781 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 00:58:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:58:41,014 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:58:41,014 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:58:41,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:58:41 BoogieIcfgContainer [2020-11-30 00:58:41,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:58:41,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:58:41,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:58:41,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:58:41,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:58:40" (1/3) ... [2020-11-30 00:58:41,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d595603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:58:41, skipping insertion in model container [2020-11-30 00:58:41,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:58:40" (2/3) ... [2020-11-30 00:58:41,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d595603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:58:41, skipping insertion in model container [2020-11-30 00:58:41,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:58:41" (3/3) ... [2020-11-30 00:58:41,053 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2020-11-30 00:58:41,066 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:58:41,071 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:58:41,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:58:41,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:58:41,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:58:41,131 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:58:41,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:58:41,131 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:58:41,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:58:41,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:58:41,132 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:58:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-30 00:58:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:58:41,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:41,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:41,157 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:41,164 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-30 00:58:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:41,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282102886] [2020-11-30 00:58:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:41,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:41,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282102886] [2020-11-30 00:58:41,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:58:41,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:58:41,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358773221] [2020-11-30 00:58:41,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:58:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:58:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:58:41,561 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-30 00:58:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:41,672 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 00:58:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:58:41,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:58:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:41,696 INFO L225 Difference]: With dead ends: 26 [2020-11-30 00:58:41,708 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 00:58:41,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:58:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 00:58:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 00:58:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 00:58:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 00:58:41,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-30 00:58:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:41,766 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 00:58:41,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:58:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 00:58:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:58:41,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:41,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:41,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:58:41,772 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-30 00:58:41,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:41,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618340614] [2020-11-30 00:58:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:41,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:41,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:58:41,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618340614] [2020-11-30 00:58:41,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119312518] [2020-11-30 00:58:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:58:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:58:42,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:42,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-30 00:58:42,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944450426] [2020-11-30 00:58:42,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:58:42,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:58:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:58:42,126 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-30 00:58:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:42,215 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-30 00:58:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:58:42,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 00:58:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:42,219 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:58:42,219 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 00:58:42,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:58:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 00:58:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 00:58:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:58:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 00:58:42,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-30 00:58:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:42,233 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 00:58:42,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:58:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 00:58:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:58:42,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:42,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:42,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 00:58:42,465 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-30 00:58:42,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:42,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748288602] [2020-11-30 00:58:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:42,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:42,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 00:58:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748288602] [2020-11-30 00:58:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262879879] [2020-11-30 00:58:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:42,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:58:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:58:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 00:58:42,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:42,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-30 00:58:42,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556930017] [2020-11-30 00:58:42,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:58:42,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:58:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:58:42,861 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-11-30 00:58:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:42,962 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-30 00:58:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:58:42,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-30 00:58:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:42,966 INFO L225 Difference]: With dead ends: 25 [2020-11-30 00:58:42,966 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 00:58:42,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:58:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 00:58:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 00:58:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:58:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 00:58:42,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-30 00:58:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:42,976 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 00:58:42,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:58:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 00:58:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:58:42,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:42,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:43,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:43,205 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:43,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-30 00:58:43,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:43,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826404790] [2020-11-30 00:58:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:43,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:43,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:43,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:43,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 00:58:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826404790] [2020-11-30 00:58:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964112283] [2020-11-30 00:58:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:43,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 00:58:43,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:58:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 00:58:43,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:43,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-30 00:58:43,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773229061] [2020-11-30 00:58:43,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 00:58:43,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:43,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 00:58:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:58:43,570 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-11-30 00:58:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:43,683 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-30 00:58:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:58:43,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-11-30 00:58:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:43,686 INFO L225 Difference]: With dead ends: 28 [2020-11-30 00:58:43,686 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 00:58:43,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:58:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 00:58:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 00:58:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 00:58:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-30 00:58:43,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-30 00:58:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:43,699 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-30 00:58:43,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 00:58:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-30 00:58:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 00:58:43,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:43,704 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:43,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:43,921 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-30 00:58:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:43,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5049964] [2020-11-30 00:58:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:43,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-30 00:58:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5049964] [2020-11-30 00:58:44,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316495094] [2020-11-30 00:58:44,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:44,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:58:44,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:44,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 00:58:44,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-30 00:58:44,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:44,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-30 00:58:44,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086006987] [2020-11-30 00:58:44,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 00:58:44,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:44,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 00:58:44,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:58:44,378 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-11-30 00:58:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:44,509 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-30 00:58:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:58:44,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-11-30 00:58:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:44,513 INFO L225 Difference]: With dead ends: 31 [2020-11-30 00:58:44,514 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 00:58:44,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:58:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 00:58:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 00:58:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:58:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-30 00:58:44,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-30 00:58:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:44,528 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-30 00:58:44,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 00:58:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-30 00:58:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 00:58:44,535 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:44,535 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:44,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:44,757 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-30 00:58:44,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:44,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582077266] [2020-11-30 00:58:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:44,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 00:58:45,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582077266] [2020-11-30 00:58:45,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675920474] [2020-11-30 00:58:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:45,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-30 00:58:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:58:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 00:58:45,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:45,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-30 00:58:45,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002399222] [2020-11-30 00:58:45,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:58:45,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:58:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:58:45,186 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-11-30 00:58:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:45,326 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-30 00:58:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:58:45,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-11-30 00:58:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:45,330 INFO L225 Difference]: With dead ends: 34 [2020-11-30 00:58:45,330 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 00:58:45,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:58:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 00:58:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-30 00:58:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 00:58:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-30 00:58:45,344 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-30 00:58:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:45,347 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-30 00:58:45,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:58:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-30 00:58:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 00:58:45,352 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:45,352 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:45,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 00:58:45,553 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-30 00:58:45,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:45,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586626195] [2020-11-30 00:58:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-30 00:58:45,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586626195] [2020-11-30 00:58:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443752375] [2020-11-30 00:58:45,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:45,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-30 00:58:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:58:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-30 00:58:46,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:46,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-30 00:58:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188518700] [2020-11-30 00:58:46,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 00:58:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 00:58:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:58:46,027 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-11-30 00:58:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:46,204 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-30 00:58:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 00:58:46,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-11-30 00:58:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:46,206 INFO L225 Difference]: With dead ends: 37 [2020-11-30 00:58:46,206 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 00:58:46,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:58:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 00:58:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 00:58:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 00:58:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-30 00:58:46,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-30 00:58:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:46,212 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-30 00:58:46,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 00:58:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-30 00:58:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 00:58:46,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:46,213 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:46,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:46,414 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-30 00:58:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:46,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175770922] [2020-11-30 00:58:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-30 00:58:46,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175770922] [2020-11-30 00:58:46,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468954374] [2020-11-30 00:58:46,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 00:58:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-30 00:58:46,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:46,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-30 00:58:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682338309] [2020-11-30 00:58:46,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 00:58:46,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:58:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:58:46,860 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2020-11-30 00:58:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:47,052 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-30 00:58:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:58:47,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-11-30 00:58:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:47,054 INFO L225 Difference]: With dead ends: 40 [2020-11-30 00:58:47,054 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 00:58:47,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-11-30 00:58:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 00:58:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 00:58:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 00:58:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-30 00:58:47,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-30 00:58:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:47,067 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-30 00:58:47,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 00:58:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-30 00:58:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-30 00:58:47,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:47,070 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:47,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:47,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-30 00:58:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:47,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779627826] [2020-11-30 00:58:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 00:58:47,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779627826] [2020-11-30 00:58:47,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427371647] [2020-11-30 00:58:47,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:47,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:58:47,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:58:47,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 00:58:47,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:47,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-30 00:58:47,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381977449] [2020-11-30 00:58:47,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 00:58:47,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:47,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 00:58:47,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-30 00:58:47,796 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-11-30 00:58:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:47,971 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-30 00:58:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 00:58:47,972 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-11-30 00:58:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:47,974 INFO L225 Difference]: With dead ends: 43 [2020-11-30 00:58:47,974 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 00:58:47,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:58:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 00:58:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-30 00:58:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 00:58:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-30 00:58:47,982 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-30 00:58:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:47,982 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-30 00:58:47,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 00:58:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-30 00:58:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-30 00:58:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:47,988 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:48,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-30 00:58:48,217 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-30 00:58:48,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:48,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560818931] [2020-11-30 00:58:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-30 00:58:48,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560818931] [2020-11-30 00:58:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035438366] [2020-11-30 00:58:48,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:48,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 00:58:48,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 00:58:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-30 00:58:48,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:48,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-11-30 00:58:48,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653295880] [2020-11-30 00:58:48,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 00:58:48,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 00:58:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:58:48,823 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-11-30 00:58:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:49,040 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-30 00:58:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 00:58:49,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-11-30 00:58:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:49,043 INFO L225 Difference]: With dead ends: 46 [2020-11-30 00:58:49,043 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 00:58:49,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-11-30 00:58:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 00:58:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 00:58:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 00:58:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-30 00:58:49,055 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-30 00:58:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:49,055 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-30 00:58:49,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 00:58:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-30 00:58:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-30 00:58:49,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:49,060 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:49,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:49,281 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-30 00:58:49,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:49,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444079970] [2020-11-30 00:58:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:49,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:50,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:50,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-30 00:58:50,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444079970] [2020-11-30 00:58:50,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589599428] [2020-11-30 00:58:50,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:50,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:58:50,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-30 00:58:50,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-30 00:58:50,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:50,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-30 00:58:50,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451887291] [2020-11-30 00:58:50,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-30 00:58:50,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-30 00:58:50,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-11-30 00:58:50,387 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 25 states. [2020-11-30 00:58:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:50,745 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-30 00:58:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-30 00:58:50,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2020-11-30 00:58:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:50,748 INFO L225 Difference]: With dead ends: 49 [2020-11-30 00:58:50,748 INFO L226 Difference]: Without dead ends: 45 [2020-11-30 00:58:50,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-11-30 00:58:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-30 00:58:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-30 00:58:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 00:58:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-30 00:58:50,771 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-11-30 00:58:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:50,771 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-30 00:58:50,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-30 00:58:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-30 00:58:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-30 00:58:50,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:50,779 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:50,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:50,993 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-11-30 00:58:50,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:50,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733794673] [2020-11-30 00:58:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:58:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-30 00:58:51,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733794673] [2020-11-30 00:58:51,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262946238] [2020-11-30 00:58:51,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:51,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-30 00:58:51,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 00:58:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-30 00:58:51,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:58:51,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 18 [2020-11-30 00:58:51,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378985054] [2020-11-30 00:58:51,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 00:58:51,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 00:58:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:58:51,674 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-11-30 00:58:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:52,050 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-11-30 00:58:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 00:58:52,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-11-30 00:58:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:52,058 INFO L225 Difference]: With dead ends: 45 [2020-11-30 00:58:52,058 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:58:52,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-30 00:58:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:58:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:58:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:58:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:58:52,060 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2020-11-30 00:58:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:52,061 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:58:52,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 00:58:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:58:52,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:58:52,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 00:58:52,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 00:58:52,285 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 00:58:52,286 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 00:58:52,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 00:58:52,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 00:58:52,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 00:58:52,286 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-30 00:58:52,286 INFO L274 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-11-30 00:58:52,287 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 10 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 10)) [2020-11-30 00:58:52,287 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-30 00:58:52,287 INFO L274 CegarLoopResult]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-11-30 00:58:52,287 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-30 00:58:52,287 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-11-30 00:58:52,287 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-11-30 00:58:52,287 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-11-30 00:58:52,287 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-11-30 00:58:52,288 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-30 00:58:52,288 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-30 00:58:52,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:58:52 BoogieIcfgContainer [2020-11-30 00:58:52,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:58:52,295 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:58:52,295 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:58:52,295 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:58:52,296 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:58:41" (3/4) ... [2020-11-30 00:58:52,300 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:58:52,307 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-30 00:58:52,312 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 00:58:52,313 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:58:52,313 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:58:52,313 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:58:52,352 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3fcc7e58-aaf6-4ed5-be9c-0bd0a69cdbad/bin/uautomizer/witness.graphml [2020-11-30 00:58:52,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:58:52,355 INFO L168 Benchmark]: Toolchain (without parser) took 11962.72 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.3 MB in the beginning and 42.9 MB in the end (delta: 18.3 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:52,355 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:58:52,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.02 ms. Allocated memory is still 92.3 MB. Free memory was 61.1 MB in the beginning and 69.2 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:52,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.33 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 68.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:58:52,357 INFO L168 Benchmark]: Boogie Preprocessor took 18.64 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 67.1 MB in the end (delta: 900.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:58:52,358 INFO L168 Benchmark]: RCFGBuilder took 318.21 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 56.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:52,359 INFO L168 Benchmark]: TraceAbstraction took 11249.49 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 56.0 MB in the beginning and 45.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:52,359 INFO L168 Benchmark]: Witness Printer took 58.38 ms. Allocated memory is still 111.1 MB. Free memory was 45.0 MB in the beginning and 42.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:52,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.02 ms. Allocated memory is still 92.3 MB. Free memory was 61.1 MB in the beginning and 69.2 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.33 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 68.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.64 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 67.1 MB in the end (delta: 900.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 318.21 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 56.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11249.49 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 56.0 MB in the beginning and 45.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. * Witness Printer took 58.38 ms. Allocated memory is still 111.1 MB. Free memory was 45.0 MB in the beginning and 42.9 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: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.1s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 163 SDtfs, 262 SDslu, 1017 SDs, 0 SdLazy, 714 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 843 GetRequests, 642 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1022 NumberOfCodeBlocks, 1016 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 999 ConstructedInterpolants, 0 QuantifiedInterpolants, 144735 SizeOfPredicates, 77 NumberOfNonLiveVariables, 1447 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 1936/3168 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...