./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.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_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 9c7ba5c9f0a7a42e8e0568f3ec0114957a740d2b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:38:02,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:38:02,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:38:02,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:38:02,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:38:02,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:38:02,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:38:02,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:38:02,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:38:02,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:38:02,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:38:02,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:38:02,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:38:02,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:38:02,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:38:02,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:38:02,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:38:02,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:38:02,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:38:02,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:38:02,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:38:02,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:38:02,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:38:02,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:38:02,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:38:02,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:38:02,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:38:02,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:38:02,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:38:02,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:38:02,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:38:02,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:38:02,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:38:02,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:38:02,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:38:02,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:38:02,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:38:02,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:38:02,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:38:02,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:38:02,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:38:02,846 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:38:02,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:38:02,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:38:02,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:38:02,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:38:02,871 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:38:02,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:38:02,871 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:38:02,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:38:02,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:38:02,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:38:02,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:38:02,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:38:02,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:38:02,873 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:38:02,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:38:02,873 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:38:02,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:38:02,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:38:02,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:38:02,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:38:02,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:38:02,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:38:02,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:38:02,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:38:02,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:38:02,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:38:02,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:38:02,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:38:02,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:38:02,877 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_176cf82d-00e7-430c-b3a1-0d081174ba41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c7ba5c9f0a7a42e8e0568f3ec0114957a740d2b [2020-11-29 21:38:03,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:38:03,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:38:03,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:38:03,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:38:03,244 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:38:03,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann03.c [2020-11-29 21:38:03,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/data/4751cad37/dc266f7014b740689f81dee21aa79b13/FLAG9f98e7f22 [2020-11-29 21:38:03,839 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:38:03,840 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/sv-benchmarks/c/recursive/Ackermann03.c [2020-11-29 21:38:03,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/data/4751cad37/dc266f7014b740689f81dee21aa79b13/FLAG9f98e7f22 [2020-11-29 21:38:04,205 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/data/4751cad37/dc266f7014b740689f81dee21aa79b13 [2020-11-29 21:38:04,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:38:04,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:38:04,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:38:04,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:38:04,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:38:04,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c027c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04, skipping insertion in model container [2020-11-29 21:38:04,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:38:04,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:38:04,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:38:04,436 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:38:04,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:38:04,481 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:38:04,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04 WrapperNode [2020-11-29 21:38:04,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:38:04,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:38:04,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:38:04,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:38:04,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:38:04,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:38:04,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:38:04,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:38:04,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... [2020-11-29 21:38:04,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:38:04,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:38:04,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:38:04,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:38:04,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:38:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:38:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-11-29 21:38:04,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-11-29 21:38:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:38:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:38:04,864 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:38:04,865 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 21:38:04,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:38:04 BoogieIcfgContainer [2020-11-29 21:38:04,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:38:04,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:38:04,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:38:04,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:38:04,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:38:04" (1/3) ... [2020-11-29 21:38:04,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f328d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:38:04, skipping insertion in model container [2020-11-29 21:38:04,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:38:04" (2/3) ... [2020-11-29 21:38:04,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f328d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:38:04, skipping insertion in model container [2020-11-29 21:38:04,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:38:04" (3/3) ... [2020-11-29 21:38:04,890 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-11-29 21:38:04,902 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:38:04,921 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:38:04,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:38:04,971 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:38:04,971 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:38:04,971 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:38:04,971 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:38:04,972 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:38:04,972 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:38:04,972 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:38:04,972 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:38:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-29 21:38:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 21:38:05,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:05,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:05,007 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1799437593, now seen corresponding path program 1 times [2020-11-29 21:38:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:05,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861965936] [2020-11-29 21:38:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:05,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:38:05,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861965936] [2020-11-29 21:38:05,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:38:05,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:38:05,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010222597] [2020-11-29 21:38:05,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:38:05,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:38:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:38:05,312 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-11-29 21:38:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:05,532 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2020-11-29 21:38:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:38:05,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 21:38:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:05,551 INFO L225 Difference]: With dead ends: 52 [2020-11-29 21:38:05,551 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 21:38:05,557 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 [2020-11-29 21:38:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 21:38:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 21:38:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 21:38:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-11-29 21:38:05,605 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2020-11-29 21:38:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:05,605 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-11-29 21:38:05,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:38:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-11-29 21:38:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:38:05,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:05,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:05,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:38:05,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash 335222435, now seen corresponding path program 1 times [2020-11-29 21:38:05,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:05,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334296727] [2020-11-29 21:38:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:05,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:05,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:38:05,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334296727] [2020-11-29 21:38:05,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097483875] [2020-11-29 21:38:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 21:38:05,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:38:05,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:05,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-29 21:38:05,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722979562] [2020-11-29 21:38:05,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 21:38:05,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:05,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:38:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:38:05,985 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 8 states. [2020-11-29 21:38:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:06,141 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2020-11-29 21:38:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:38:06,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 21:38:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:06,146 INFO L225 Difference]: With dead ends: 49 [2020-11-29 21:38:06,146 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 21:38:06,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:38:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 21:38:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 21:38:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 21:38:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-11-29 21:38:06,158 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2020-11-29 21:38:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:06,158 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-11-29 21:38:06,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 21:38:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-11-29 21:38:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 21:38:06,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:06,161 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:06,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 21:38:06,386 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:06,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:06,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1209780356, now seen corresponding path program 1 times [2020-11-29 21:38:06,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:06,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273642738] [2020-11-29 21:38:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:06,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:06,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:06,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:06,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 21:38:06,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273642738] [2020-11-29 21:38:06,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773502] [2020-11-29 21:38:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:38:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 21:38:06,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:06,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-29 21:38:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942048891] [2020-11-29 21:38:06,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 21:38:06,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:38:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:38:06,729 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2020-11-29 21:38:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:06,932 INFO L93 Difference]: Finished difference Result 74 states and 134 transitions. [2020-11-29 21:38:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 21:38:06,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-29 21:38:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:06,937 INFO L225 Difference]: With dead ends: 74 [2020-11-29 21:38:06,937 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 21:38:06,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:38:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 21:38:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 21:38:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 21:38:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2020-11-29 21:38:06,971 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 32 [2020-11-29 21:38:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:06,971 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2020-11-29 21:38:06,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 21:38:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2020-11-29 21:38:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 21:38:06,975 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:06,975 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:07,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:07,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 578809375, now seen corresponding path program 2 times [2020-11-29 21:38:07,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:07,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668802943] [2020-11-29 21:38:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 21:38:07,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668802943] [2020-11-29 21:38:07,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413574928] [2020-11-29 21:38:07,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:07,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:38:07,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:07,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:38:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 21:38:07,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:07,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-29 21:38:07,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874943809] [2020-11-29 21:38:07,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 21:38:07,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:38:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:38:07,655 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 8 states. [2020-11-29 21:38:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:07,855 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2020-11-29 21:38:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:38:07,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-11-29 21:38:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:07,860 INFO L225 Difference]: With dead ends: 120 [2020-11-29 21:38:07,860 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 21:38:07,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:38:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 21:38:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-29 21:38:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 21:38:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2020-11-29 21:38:07,882 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2020-11-29 21:38:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:07,882 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2020-11-29 21:38:07,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 21:38:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2020-11-29 21:38:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 21:38:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:07,887 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:08,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:08,090 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1534840636, now seen corresponding path program 3 times [2020-11-29 21:38:08,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:08,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612240366] [2020-11-29 21:38:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-29 21:38:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-11-29 21:38:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612240366] [2020-11-29 21:38:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919383397] [2020-11-29 21:38:08,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:08,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 21:38:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:38:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-11-29 21:38:08,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:08,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2020-11-29 21:38:08,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473047544] [2020-11-29 21:38:08,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 21:38:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 21:38:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-11-29 21:38:08,795 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand 18 states. [2020-11-29 21:38:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:09,612 INFO L93 Difference]: Finished difference Result 119 states and 222 transitions. [2020-11-29 21:38:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 21:38:09,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-11-29 21:38:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:09,617 INFO L225 Difference]: With dead ends: 119 [2020-11-29 21:38:09,618 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 21:38:09,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 21:38:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 21:38:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-11-29 21:38:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 21:38:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-11-29 21:38:09,654 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 79 [2020-11-29 21:38:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:09,657 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-11-29 21:38:09,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 21:38:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-11-29 21:38:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-29 21:38:09,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:09,664 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:09,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:09,890 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -113129588, now seen corresponding path program 4 times [2020-11-29 21:38:09,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:09,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755047532] [2020-11-29 21:38:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-11-29 21:38:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-11-29 21:38:10,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755047532] [2020-11-29 21:38:10,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367310100] [2020-11-29 21:38:10,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:10,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 21:38:10,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:10,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 21:38:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-11-29 21:38:10,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:10,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-11-29 21:38:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584496948] [2020-11-29 21:38:10,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 21:38:10,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:10,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 21:38:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-11-29 21:38:10,780 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 18 states. [2020-11-29 21:38:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:11,856 INFO L93 Difference]: Finished difference Result 135 states and 257 transitions. [2020-11-29 21:38:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 21:38:11,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2020-11-29 21:38:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:11,861 INFO L225 Difference]: With dead ends: 135 [2020-11-29 21:38:11,862 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 21:38:11,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 21:38:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 21:38:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-11-29 21:38:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 21:38:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2020-11-29 21:38:11,884 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 131 [2020-11-29 21:38:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:11,884 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2020-11-29 21:38:11,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 21:38:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2020-11-29 21:38:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-11-29 21:38:11,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:11,894 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:12,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 21:38:12,095 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1068197804, now seen corresponding path program 5 times [2020-11-29 21:38:12,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:12,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161982901] [2020-11-29 21:38:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-11-29 21:38:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 258 proven. 609 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-11-29 21:38:12,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161982901] [2020-11-29 21:38:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088576831] [2020-11-29 21:38:12,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:13,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 21:38:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 21:38:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 972 proven. 226 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2020-11-29 21:38:13,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:13,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2020-11-29 21:38:13,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308329985] [2020-11-29 21:38:13,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 21:38:13,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:13,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 21:38:13,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-11-29 21:38:13,457 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand 30 states. [2020-11-29 21:38:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:14,933 INFO L93 Difference]: Finished difference Result 176 states and 323 transitions. [2020-11-29 21:38:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-29 21:38:14,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 183 [2020-11-29 21:38:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:14,937 INFO L225 Difference]: With dead ends: 176 [2020-11-29 21:38:14,937 INFO L226 Difference]: Without dead ends: 110 [2020-11-29 21:38:14,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 21:38:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-29 21:38:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-11-29 21:38:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 21:38:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 160 transitions. [2020-11-29 21:38:14,981 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 160 transitions. Word has length 183 [2020-11-29 21:38:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:14,983 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 160 transitions. [2020-11-29 21:38:14,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 21:38:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 160 transitions. [2020-11-29 21:38:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-29 21:38:14,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:14,990 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:15,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:15,206 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1103077029, now seen corresponding path program 6 times [2020-11-29 21:38:15,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:15,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104954255] [2020-11-29 21:38:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-29 21:38:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-11-29 21:38:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-29 21:38:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-11-29 21:38:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 192 proven. 575 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-11-29 21:38:15,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104954255] [2020-11-29 21:38:15,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097437723] [2020-11-29 21:38:15,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:15,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 21:38:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:38:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 952 proven. 18 refuted. 0 times theorem prover too weak. 1337 trivial. 0 not checked. [2020-11-29 21:38:16,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:16,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-11-29 21:38:16,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284013779] [2020-11-29 21:38:16,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 21:38:16,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:16,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 21:38:16,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:38:16,005 INFO L87 Difference]: Start difference. First operand 107 states and 160 transitions. Second operand 12 states. [2020-11-29 21:38:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:16,237 INFO L93 Difference]: Finished difference Result 216 states and 392 transitions. [2020-11-29 21:38:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 21:38:16,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 210 [2020-11-29 21:38:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:16,240 INFO L225 Difference]: With dead ends: 216 [2020-11-29 21:38:16,241 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 21:38:16,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-29 21:38:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 21:38:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-11-29 21:38:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 21:38:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 156 transitions. [2020-11-29 21:38:16,272 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 156 transitions. Word has length 210 [2020-11-29 21:38:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:16,273 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 156 transitions. [2020-11-29 21:38:16,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 21:38:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 156 transitions. [2020-11-29 21:38:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-11-29 21:38:16,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:16,282 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:16,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:16,506 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1207590662, now seen corresponding path program 7 times [2020-11-29 21:38:16,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:16,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374337627] [2020-11-29 21:38:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 21:38:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:16,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 21:38:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-11-29 21:38:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374337627] [2020-11-29 21:38:17,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977601816] [2020-11-29 21:38:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:17,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 79 conjunts are in the unsatisfiable core [2020-11-29 21:38:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-11-29 21:38:18,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:18,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 25 [2020-11-29 21:38:18,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44119850] [2020-11-29 21:38:18,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 21:38:18,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:18,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 21:38:18,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-11-29 21:38:18,025 INFO L87 Difference]: Start difference. First operand 106 states and 156 transitions. Second operand 25 states. [2020-11-29 21:38:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:20,539 INFO L93 Difference]: Finished difference Result 246 states and 539 transitions. [2020-11-29 21:38:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-29 21:38:20,539 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 183 [2020-11-29 21:38:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:20,546 INFO L225 Difference]: With dead ends: 246 [2020-11-29 21:38:20,546 INFO L226 Difference]: Without dead ends: 242 [2020-11-29 21:38:20,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 235 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=350, Invalid=3682, Unknown=0, NotChecked=0, Total=4032 [2020-11-29 21:38:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-29 21:38:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2020-11-29 21:38:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-29 21:38:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 203 transitions. [2020-11-29 21:38:20,608 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 203 transitions. Word has length 183 [2020-11-29 21:38:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:20,610 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 203 transitions. [2020-11-29 21:38:20,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 21:38:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 203 transitions. [2020-11-29 21:38:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-29 21:38:20,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:20,613 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:20,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 21:38:20,838 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash -290564854, now seen corresponding path program 8 times [2020-11-29 21:38:20,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:20,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429689873] [2020-11-29 21:38:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:20,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:20,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 21:38:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-11-29 21:38:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429689873] [2020-11-29 21:38:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828487913] [2020-11-29 21:38:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:21,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:38:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 21:38:21,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-11-29 21:38:21,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:21,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-11-29 21:38:21,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099273151] [2020-11-29 21:38:21,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 21:38:21,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 21:38:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-11-29 21:38:21,855 INFO L87 Difference]: Start difference. First operand 125 states and 203 transitions. Second operand 24 states. [2020-11-29 21:38:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:22,807 INFO L93 Difference]: Finished difference Result 261 states and 480 transitions. [2020-11-29 21:38:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 21:38:22,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 157 [2020-11-29 21:38:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:22,816 INFO L225 Difference]: With dead ends: 261 [2020-11-29 21:38:22,816 INFO L226 Difference]: Without dead ends: 145 [2020-11-29 21:38:22,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 21:38:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-29 21:38:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2020-11-29 21:38:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-29 21:38:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 194 transitions. [2020-11-29 21:38:22,837 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 194 transitions. Word has length 157 [2020-11-29 21:38:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:22,838 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 194 transitions. [2020-11-29 21:38:22,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 21:38:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 194 transitions. [2020-11-29 21:38:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-11-29 21:38:22,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:22,842 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:23,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:23,059 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash 810495023, now seen corresponding path program 9 times [2020-11-29 21:38:23,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:23,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259146508] [2020-11-29 21:38:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 21:38:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-11-29 21:38:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259146508] [2020-11-29 21:38:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811922107] [2020-11-29 21:38:23,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 21:38:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:23,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 21:38:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-11-29 21:38:24,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:24,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-11-29 21:38:24,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092490317] [2020-11-29 21:38:24,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 21:38:24,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 21:38:24,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-11-29 21:38:24,031 INFO L87 Difference]: Start difference. First operand 125 states and 194 transitions. Second operand 25 states. [2020-11-29 21:38:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:25,210 INFO L93 Difference]: Finished difference Result 273 states and 493 transitions. [2020-11-29 21:38:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 21:38:25,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2020-11-29 21:38:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:25,214 INFO L225 Difference]: With dead ends: 273 [2020-11-29 21:38:25,214 INFO L226 Difference]: Without dead ends: 157 [2020-11-29 21:38:25,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 21:38:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-29 21:38:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2020-11-29 21:38:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-29 21:38:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 210 transitions. [2020-11-29 21:38:25,234 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 210 transitions. Word has length 170 [2020-11-29 21:38:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:25,235 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 210 transitions. [2020-11-29 21:38:25,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 21:38:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 210 transitions. [2020-11-29 21:38:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-11-29 21:38:25,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:25,238 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:25,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:25,454 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1892619059, now seen corresponding path program 10 times [2020-11-29 21:38:25,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:25,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852452825] [2020-11-29 21:38:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 21:38:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:25,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 21:38:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-29 21:38:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 665 proven. 517 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2020-11-29 21:38:26,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852452825] [2020-11-29 21:38:26,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113481680] [2020-11-29 21:38:26,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/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 [2020-11-29 21:38:26,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 21:38:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 21:38:26,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-11-29 21:38:26,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:26,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2020-11-29 21:38:26,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421726723] [2020-11-29 21:38:26,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 21:38:26,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 21:38:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-11-29 21:38:26,527 INFO L87 Difference]: Start difference. First operand 133 states and 210 transitions. Second operand 27 states. [2020-11-29 21:38:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:27,554 INFO L93 Difference]: Finished difference Result 272 states and 497 transitions. [2020-11-29 21:38:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 21:38:27,555 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 196 [2020-11-29 21:38:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:27,558 INFO L225 Difference]: With dead ends: 272 [2020-11-29 21:38:27,558 INFO L226 Difference]: Without dead ends: 148 [2020-11-29 21:38:27,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 21:38:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-29 21:38:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-11-29 21:38:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-29 21:38:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 250 transitions. [2020-11-29 21:38:27,582 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 250 transitions. Word has length 196 [2020-11-29 21:38:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:27,585 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 250 transitions. [2020-11-29 21:38:27,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 21:38:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 250 transitions. [2020-11-29 21:38:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-11-29 21:38:27,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:27,591 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 24, 19, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:27,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 21:38:27,818 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:27,818 INFO L82 PathProgramCache]: Analyzing trace with hash 316929099, now seen corresponding path program 11 times [2020-11-29 21:38:27,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:27,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319303653] [2020-11-29 21:38:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:27,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-11-29 21:38:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 21:38:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-11-29 21:38:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 21:38:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-29 21:38:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 557 proven. 1428 refuted. 0 times theorem prover too weak. 2545 trivial. 0 not checked. [2020-11-29 21:38:28,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319303653] [2020-11-29 21:38:28,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100395479] [2020-11-29 21:38:28,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:28,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-29 21:38:28,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:28,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:38:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 2558 proven. 405 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2020-11-29 21:38:29,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:29,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2020-11-29 21:38:29,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846975576] [2020-11-29 21:38:29,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 21:38:29,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:29,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 21:38:29,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-29 21:38:29,046 INFO L87 Difference]: Start difference. First operand 146 states and 250 transitions. Second operand 14 states. [2020-11-29 21:38:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:29,411 INFO L93 Difference]: Finished difference Result 339 states and 815 transitions. [2020-11-29 21:38:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 21:38:29,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 288 [2020-11-29 21:38:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:29,415 INFO L225 Difference]: With dead ends: 339 [2020-11-29 21:38:29,415 INFO L226 Difference]: Without dead ends: 136 [2020-11-29 21:38:29,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-29 21:38:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-29 21:38:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2020-11-29 21:38:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 21:38:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2020-11-29 21:38:29,434 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 288 [2020-11-29 21:38:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:29,435 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2020-11-29 21:38:29,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 21:38:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2020-11-29 21:38:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-11-29 21:38:29,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:38:29,439 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:38:29,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 21:38:29,666 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:38:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:38:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1889223363, now seen corresponding path program 12 times [2020-11-29 21:38:29,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:38:29,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878897212] [2020-11-29 21:38:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:38:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:38:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 21:38:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:29,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 21:38:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 21:38:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-11-29 21:38:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:38:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 21:38:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 21:38:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 21:38:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 21:38:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 21:38:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-29 21:38:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:38:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 513 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-11-29 21:38:30,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878897212] [2020-11-29 21:38:30,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273573845] [2020-11-29 21:38:30,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:38:30,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-11-29 21:38:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:38:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 21:38:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:38:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 210 proven. 398 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2020-11-29 21:38:30,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:38:30,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-11-29 21:38:30,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838305152] [2020-11-29 21:38:30,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 21:38:30,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:38:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 21:38:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:38:30,706 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 12 states. [2020-11-29 21:38:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:38:30,960 INFO L93 Difference]: Finished difference Result 112 states and 133 transitions. [2020-11-29 21:38:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:38:30,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 281 [2020-11-29 21:38:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:38:30,961 INFO L225 Difference]: With dead ends: 112 [2020-11-29 21:38:30,962 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:38:30,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-11-29 21:38:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:38:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:38:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:38:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:38:30,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2020-11-29 21:38:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:38:30,963 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:38:30,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 21:38:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:38:30,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:38:31,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 21:38:31,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 21:38:31,846 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 86 [2020-11-29 21:38:32,694 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 91 [2020-11-29 21:38:33,585 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 90 [2020-11-29 21:38:33,758 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 94 [2020-11-29 21:38:34,085 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 89 [2020-11-29 21:38:34,782 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 19 [2020-11-29 21:38:36,678 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 209 DAG size of output: 62 [2020-11-29 21:38:36,823 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 9 [2020-11-29 21:38:36,886 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 21:38:36,886 INFO L274 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L277 CegarLoopResult]: At program point L27(lines 27 47) the Hoare annotation is: true [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point L42(lines 42 46) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L277 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: true [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point L35(lines 35 40) no Hoare annotation was computed. [2020-11-29 21:38:36,887 INFO L274 CegarLoopResult]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2020-11-29 21:38:36,888 INFO L270 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (or (not (<= 1 |ackermann_#in~n|)) (not (<= 0 |ackermann_#in~m|)) (not (<= |ackermann_#in~n| 1)) (<= 1 |ackermann_#in~m|)) (not (= |ackermann_#in~n| 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-11-29 21:38:36,888 INFO L274 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-11-29 21:38:36,888 INFO L277 CegarLoopResult]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2020-11-29 21:38:36,888 INFO L270 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-11-29 21:38:36,888 INFO L270 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= |ackermann_#in~m| 1)) (.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse15 (<= 1 |ackermann_#in~m|))) (let ((.cse5 (<= 6 |ackermann_#in~n|)) (.cse7 (not .cse15)) (.cse8 (and .cse0 (<= 6 |ackermann_#t~ret8|) (<= 5 |ackermann_#in~n|) (<= |ackermann_#t~ret8| 6) .cse1 .cse2 .cse15)) (.cse6 (<= |ackermann_#t~ret8| 5)) (.cse3 (<= 5 |ackermann_#t~ret8|)) (.cse11 (<= 3 |ackermann_#in~n|)) (.cse9 (and .cse1 .cse2 (= |ackermann_#in~m| 0))) (.cse10 (<= |ackermann_#in~n| 1)) (.cse12 (= |ackermann_#t~ret8| 3)) (.cse4 (<= 2 |ackermann_#in~m|)) (.cse13 (<= 3 |ackermann_#in~m|))) (and (or (and .cse0 (<= |ackermann_#in~n| 3) (<= |ackermann_#t~ret8| 4) (<= 4 |ackermann_#t~ret8|) .cse1 .cse2) (and .cse1 .cse3 .cse2 .cse4) (and .cse5 .cse3) (and (<= 4 |ackermann_#in~n|) .cse6 .cse1 .cse2 .cse3) (and (<= |ackermann_#in~n| 2) .cse1 .cse2) .cse7 .cse8) (or (not (<= |ackermann_#in~m| 0)) .cse9) (or .cse10 (and .cse11 (<= |ackermann_#in~n| 4)) .cse12 (and .cse5 .cse1 .cse2) (and .cse1 .cse2 .cse4) .cse7 .cse8) (or .cse10 (and .cse6 .cse3) (and .cse13 .cse3) .cse0 .cse11) (let ((.cse14 (<= 1 |ackermann_#in~n|))) (or .cse9 (and .cse0 (= |ackermann_#t~ret8| 2) .cse14) (not .cse10) (and .cse12 .cse14 .cse4) (and .cse14 (<= 3 |ackermann_#t~ret8|) .cse13)))))) [2020-11-29 21:38:36,889 INFO L274 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-11-29 21:38:36,889 INFO L274 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-29 21:38:36,889 INFO L274 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-11-29 21:38:36,889 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-11-29 21:38:36,889 INFO L274 CegarLoopResult]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2020-11-29 21:38:36,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:38:36 BoogieIcfgContainer [2020-11-29 21:38:36,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:38:36,899 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:38:36,899 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:38:36,899 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:38:36,900 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:38:04" (3/4) ... [2020-11-29 21:38:36,903 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:38:36,910 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2020-11-29 21:38:36,914 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 21:38:36,914 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-29 21:38:36,915 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:38:36,915 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:38:36,949 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_176cf82d-00e7-430c-b3a1-0d081174ba41/bin/uautomizer/witness.graphml [2020-11-29 21:38:36,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:38:36,951 INFO L168 Benchmark]: Toolchain (without parser) took 32742.20 ms. Allocated memory was 92.3 MB in the beginning and 534.8 MB in the end (delta: 442.5 MB). Free memory was 61.5 MB in the beginning and 382.1 MB in the end (delta: -320.6 MB). Peak memory consumption was 120.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:38:36,951 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 92.3 MB. Free memory was 48.9 MB in the beginning and 48.8 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:38:36,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.67 ms. Allocated memory is still 92.3 MB. Free memory was 61.3 MB in the beginning and 70.4 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:38:36,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.75 ms. Allocated memory is still 92.3 MB. Free memory was 70.4 MB in the beginning and 69.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:38:36,952 INFO L168 Benchmark]: Boogie Preprocessor took 21.87 ms. Allocated memory is still 92.3 MB. Free memory was 69.1 MB in the beginning and 68.2 MB in the end (delta: 890.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:38:36,953 INFO L168 Benchmark]: RCFGBuilder took 333.26 ms. Allocated memory is still 92.3 MB. Free memory was 67.8 MB in the beginning and 55.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:38:36,953 INFO L168 Benchmark]: TraceAbstraction took 32024.23 ms. Allocated memory was 92.3 MB in the beginning and 534.8 MB in the end (delta: 442.5 MB). Free memory was 54.8 MB in the beginning and 385.2 MB in the end (delta: -330.5 MB). Peak memory consumption was 310.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:38:36,954 INFO L168 Benchmark]: Witness Printer took 50.83 ms. Allocated memory is still 534.8 MB. Free memory was 385.2 MB in the beginning and 382.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:38:36,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 92.3 MB. Free memory was 48.9 MB in the beginning and 48.8 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.67 ms. Allocated memory is still 92.3 MB. Free memory was 61.3 MB in the beginning and 70.4 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.75 ms. Allocated memory is still 92.3 MB. Free memory was 70.4 MB in the beginning and 69.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.87 ms. Allocated memory is still 92.3 MB. Free memory was 69.1 MB in the beginning and 68.2 MB in the end (delta: 890.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 333.26 ms. Allocated memory is still 92.3 MB. Free memory was 67.8 MB in the beginning and 55.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32024.23 ms. Allocated memory was 92.3 MB in the beginning and 534.8 MB in the end (delta: 442.5 MB). Free memory was 54.8 MB in the beginning and 385.2 MB in the end (delta: -330.5 MB). Peak memory consumption was 310.3 MB. Max. memory is 16.1 GB. * Witness Printer took 50.83 ms. Allocated memory is still 534.8 MB. Free memory was 385.2 MB in the beginning and 382.1 MB in the end (delta: 3.1 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: 3]: 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 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.2s, OverallIterations: 14, TraceHistogramMax: 43, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 391 SDtfs, 512 SDslu, 2168 SDs, 0 SdLazy, 6352 SolverSat, 1113 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3002 GetRequests, 2555 SyntacticMatches, 7 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4582 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 226 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 714 PreInvPairs, 2023 NumberOfFragments, 277 HoareAnnotationTreeSize, 714 FomulaSimplifications, 599083 FormulaSimplificationTreeSizeReduction, 3.3s HoareSimplificationTime, 6 FomulaSimplificationsInter, 15013 FormulaSimplificationTreeSizeReductionInter, 2.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 3960 NumberOfCodeBlocks, 3659 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 3933 ConstructedInterpolants, 0 QuantifiedInterpolants, 1318751 SizeOfPredicates, 97 NumberOfNonLiveVariables, 5257 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 33825/41186 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...