./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 42712a480385f40caa20979fd35763a8ad414af5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 18:45:42,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:45:42,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:45:42,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:45:42,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:45:42,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:45:42,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:45:42,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:45:42,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:45:42,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:45:42,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:45:42,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:45:42,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:45:42,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:45:42,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:45:42,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:45:42,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:45:42,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:45:42,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:45:42,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:45:42,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:45:42,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:45:42,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:45:42,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:45:42,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:45:42,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:45:42,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:45:42,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:45:42,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:45:42,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:45:42,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:45:42,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:45:42,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:45:42,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:45:42,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:45:42,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:45:42,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:45:42,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:45:42,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:45:42,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:45:42,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:45:42,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:45:42,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:45:42,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:45:42,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:45:42,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:45:42,619 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:45:42,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:45:42,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:45:42,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:45:42,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:45:42,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:45:42,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:45:42,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:45:42,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:45:42,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:45:42,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:45:42,623 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:45:42,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:45:42,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:45:42,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:45:42,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:45:42,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:45:42,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:45:42,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:45:42,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:45:42,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:45:42,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:45:42,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:45:42,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:45:42,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:45:42,626 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_4ae9873e-b93b-450c-be4e-cde9eda7a714/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42712a480385f40caa20979fd35763a8ad414af5 [2020-11-29 18:45:42,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:45:42,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:45:42,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:45:42,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:45:42,906 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:45:42,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2020-11-29 18:45:42,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/data/eb29cb317/25488c96db024f6488c429bb7c68011f/FLAG91db1ed80 [2020-11-29 18:45:43,389 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:45:43,390 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2020-11-29 18:45:43,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/data/eb29cb317/25488c96db024f6488c429bb7c68011f/FLAG91db1ed80 [2020-11-29 18:45:43,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/data/eb29cb317/25488c96db024f6488c429bb7c68011f [2020-11-29 18:45:43,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:45:43,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:45:43,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:45:43,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:45:43,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:45:43,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:45:43" (1/1) ... [2020-11-29 18:45:43,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414c9b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:43, skipping insertion in model container [2020-11-29 18:45:43,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:45:43" (1/1) ... [2020-11-29 18:45:43,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:45:43,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:45:43,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:45:44,031 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:45:44,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:45:44,072 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:45:44,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44 WrapperNode [2020-11-29 18:45:44,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:45:44,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:45:44,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:45:44,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:45:44,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:45:44,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:45:44,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:45:44,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:45:44,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... [2020-11-29 18:45:44,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:45:44,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:45:44,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:45:44,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:45:44,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:45:44,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:45:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-29 18:45:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-29 18:45:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:45:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:45:44,565 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:45:44,565 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 18:45:44,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:45:44 BoogieIcfgContainer [2020-11-29 18:45:44,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:45:44,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:45:44,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:45:44,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:45:44,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:45:43" (1/3) ... [2020-11-29 18:45:44,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d8ddb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:45:44, skipping insertion in model container [2020-11-29 18:45:44,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:45:44" (2/3) ... [2020-11-29 18:45:44,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d8ddb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:45:44, skipping insertion in model container [2020-11-29 18:45:44,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:45:44" (3/3) ... [2020-11-29 18:45:44,578 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-11-29 18:45:44,594 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:45:44,598 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:45:44,610 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:45:44,633 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:45:44,634 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:45:44,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:45:44,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:45:44,634 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:45:44,634 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:45:44,634 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:45:44,643 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:45:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 18:45:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 18:45:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:44,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:44,662 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:44,667 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-29 18:45:44,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:44,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572304820] [2020-11-29 18:45:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:44,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:44,887 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 18:45:44,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572304820] [2020-11-29 18:45:44,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:45:44,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:45:44,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690877408] [2020-11-29 18:45:44,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:45:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:44,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:45:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:45:44,909 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-29 18:45:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:45,016 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-29 18:45:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:45:45,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 18:45:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:45,031 INFO L225 Difference]: With dead ends: 26 [2020-11-29 18:45:45,036 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 18:45:45,039 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 18:45:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 18:45:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 18:45:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 18:45:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-29 18:45:45,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-29 18:45:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:45,073 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-29 18:45:45,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:45:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-29 18:45:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 18:45:45,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:45,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:45,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:45:45,075 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:45,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:45,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-29 18:45:45,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:45,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104273302] [2020-11-29 18:45:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 18:45:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104273302] [2020-11-29 18:45:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432786852] [2020-11-29 18:45:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:45:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 18:45:45,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:45,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 18:45:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983811819] [2020-11-29 18:45:45,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:45:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:45:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:45:45,371 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-11-29 18:45:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:45,612 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-29 18:45:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:45:45,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-29 18:45:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:45,615 INFO L225 Difference]: With dead ends: 22 [2020-11-29 18:45:45,615 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 18:45:45,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:45:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 18:45:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 18:45:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 18:45:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 18:45:45,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-29 18:45:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:45,628 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 18:45:45,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:45:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 18:45:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 18:45:45,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:45,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:45,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 18:45:45,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:45,832 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-29 18:45:45,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:45,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64602553] [2020-11-29 18:45:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 18:45:45,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64602553] [2020-11-29 18:45:45,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579304335] [2020-11-29 18:45:45,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:46,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:45:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:46,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:45:46,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 18:45:46,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:46,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 18:45:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229546916] [2020-11-29 18:45:46,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 18:45:46,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:45:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:45:46,116 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-11-29 18:45:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:46,216 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-29 18:45:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:45:46,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-29 18:45:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:46,217 INFO L225 Difference]: With dead ends: 25 [2020-11-29 18:45:46,217 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 18:45:46,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:45:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 18:45:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 18:45:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 18:45:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-29 18:45:46,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-29 18:45:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:46,224 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-29 18:45:46,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 18:45:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-29 18:45:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 18:45:46,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:46,226 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:46,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:46,437 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-29 18:45:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:46,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193276146] [2020-11-29 18:45:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:46,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:46,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:45:46,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193276146] [2020-11-29 18:45:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948101068] [2020-11-29 18:45:46,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:46,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:45:46,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:45:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:45:46,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:46,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 18:45:46,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675946941] [2020-11-29 18:45:46,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 18:45:46,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:45:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:45:46,777 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-11-29 18:45:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:46,857 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-29 18:45:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:45:46,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-29 18:45:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:46,858 INFO L225 Difference]: With dead ends: 28 [2020-11-29 18:45:46,858 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 18:45:46,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:45:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 18:45:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 18:45:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:45:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 18:45:46,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-29 18:45:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:46,864 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 18:45:46,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 18:45:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 18:45:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 18:45:46,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:46,866 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:47,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:47,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-29 18:45:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:47,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863309300] [2020-11-29 18:45:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 18:45:47,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863309300] [2020-11-29 18:45:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310379800] [2020-11-29 18:45:47,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:47,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:45:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:45:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 18:45:47,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:47,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 18:45:47,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708606051] [2020-11-29 18:45:47,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:45:47,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:47,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:45:47,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:45:47,444 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-11-29 18:45:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:47,556 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-29 18:45:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:45:47,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-11-29 18:45:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:47,558 INFO L225 Difference]: With dead ends: 31 [2020-11-29 18:45:47,558 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 18:45:47,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:45:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 18:45:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 18:45:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 18:45:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 18:45:47,564 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-29 18:45:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:47,570 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 18:45:47,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:45:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 18:45:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 18:45:47,572 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:47,573 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:47,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:47,787 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-29 18:45:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:47,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017446427] [2020-11-29 18:45:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:47,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 18:45:48,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017446427] [2020-11-29 18:45:48,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914224509] [2020-11-29 18:45:48,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:48,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 18:45:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:45:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 18:45:48,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:48,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 18:45:48,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589995588] [2020-11-29 18:45:48,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:45:48,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:45:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:45:48,180 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-11-29 18:45:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:48,306 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 18:45:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:45:48,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-11-29 18:45:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:48,308 INFO L225 Difference]: With dead ends: 34 [2020-11-29 18:45:48,308 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 18:45:48,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:45:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 18:45:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-29 18:45:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 18:45:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 18:45:48,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-29 18:45:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:48,315 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 18:45:48,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:45:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 18:45:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 18:45:48,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:48,317 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 18:45:48,518 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-29 18:45:48,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:48,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097674958] [2020-11-29 18:45:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 18:45:48,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097674958] [2020-11-29 18:45:48,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365142522] [2020-11-29 18:45:48,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:48,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 18:45:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:48,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:45:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 18:45:48,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:48,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 18:45:48,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363986170] [2020-11-29 18:45:48,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:45:48,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:48,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:45:48,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:45:48,929 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-11-29 18:45:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:49,099 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-29 18:45:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:45:49,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-11-29 18:45:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:49,100 INFO L225 Difference]: With dead ends: 37 [2020-11-29 18:45:49,101 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 18:45:49,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:45:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 18:45:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-29 18:45:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 18:45:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-29 18:45:49,107 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-29 18:45:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:49,107 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-29 18:45:49,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:45:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-29 18:45:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 18:45:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:49,110 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:49,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:49,310 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-29 18:45:49,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:49,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588935403] [2020-11-29 18:45:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-29 18:45:49,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588935403] [2020-11-29 18:45:49,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006527641] [2020-11-29 18:45:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:45:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-29 18:45:49,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:49,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 18:45:49,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696295532] [2020-11-29 18:45:49,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:45:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:49,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:45:49,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:45:49,735 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-11-29 18:45:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:49,899 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-29 18:45:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:45:49,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-29 18:45:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:49,901 INFO L225 Difference]: With dead ends: 40 [2020-11-29 18:45:49,901 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 18:45:49,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-11-29 18:45:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 18:45:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 18:45:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 18:45:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 18:45:49,913 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-29 18:45:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:49,914 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 18:45:49,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:45:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 18:45:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 18:45:49,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:49,917 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:50,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:50,141 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-29 18:45:50,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:50,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76481529] [2020-11-29 18:45:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 18:45:50,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76481529] [2020-11-29 18:45:50,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144322229] [2020-11-29 18:45:50,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:50,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:45:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:45:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 18:45:50,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:50,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 18:45:50,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172184058] [2020-11-29 18:45:50,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 18:45:50,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:45:50,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:45:50,615 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-11-29 18:45:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:50,793 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-29 18:45:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:45:50,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-11-29 18:45:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:50,795 INFO L225 Difference]: With dead ends: 43 [2020-11-29 18:45:50,795 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 18:45:50,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:45:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 18:45:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 18:45:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 18:45:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-29 18:45:50,807 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-29 18:45:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:50,807 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-29 18:45:50,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 18:45:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-29 18:45:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-29 18:45:50,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:50,813 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:51,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 18:45:51,033 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-29 18:45:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:51,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419337756] [2020-11-29 18:45:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 18:45:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419337756] [2020-11-29 18:45:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244676339] [2020-11-29 18:45:51,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:51,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 18:45:51,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:51,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:45:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 18:45:51,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:51,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 18:45:51,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588238330] [2020-11-29 18:45:51,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:45:51,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:45:51,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:45:51,592 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-11-29 18:45:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:51,779 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-29 18:45:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 18:45:51,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-11-29 18:45:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:51,781 INFO L225 Difference]: With dead ends: 46 [2020-11-29 18:45:51,781 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 18:45:51,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-11-29 18:45:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 18:45:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 18:45:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 18:45:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-29 18:45:51,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-29 18:45:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:51,796 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-29 18:45:51,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:45:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-29 18:45:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-29 18:45:51,797 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:51,797 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:51,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:51,998 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-29 18:45:51,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:51,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499996405] [2020-11-29 18:45:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-29 18:45:52,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499996405] [2020-11-29 18:45:52,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774247737] [2020-11-29 18:45:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:52,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:45:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:52,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 18:45:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-29 18:45:52,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:52,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 18:45:52,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636515088] [2020-11-29 18:45:52,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 18:45:52,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:52,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 18:45:52,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-11-29 18:45:52,522 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-11-29 18:45:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:52,743 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-29 18:45:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 18:45:52,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-11-29 18:45:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:52,745 INFO L225 Difference]: With dead ends: 49 [2020-11-29 18:45:52,745 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 18:45:52,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-11-29 18:45:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 18:45:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-29 18:45:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 18:45:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-29 18:45:52,752 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-11-29 18:45:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:52,754 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-29 18:45:52,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 18:45:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-29 18:45:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-29 18:45:52,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:52,757 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:52,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:52,981 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-11-29 18:45:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:52,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226459326] [2020-11-29 18:45:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-29 18:45:53,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226459326] [2020-11-29 18:45:53,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838643724] [2020-11-29 18:45:53,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:53,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 18:45:53,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 18:45:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-29 18:45:53,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:53,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 18:45:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915377506] [2020-11-29 18:45:53,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 18:45:53,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 18:45:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:45:53,605 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-11-29 18:45:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:53,856 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-29 18:45:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 18:45:53,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-29 18:45:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:53,857 INFO L225 Difference]: With dead ends: 52 [2020-11-29 18:45:53,857 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 18:45:53,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-29 18:45:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 18:45:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-29 18:45:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 18:45:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-29 18:45:53,864 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-11-29 18:45:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:53,868 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-29 18:45:53,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 18:45:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-29 18:45:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-29 18:45:53,869 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:53,870 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:54,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 18:45:54,085 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-11-29 18:45:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:54,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581570872] [2020-11-29 18:45:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-29 18:45:54,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581570872] [2020-11-29 18:45:54,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946109056] [2020-11-29 18:45:54,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:54,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 18:45:54,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:45:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-29 18:45:54,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:54,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 18:45:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798873034] [2020-11-29 18:45:54,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 18:45:54,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 18:45:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-11-29 18:45:54,759 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-11-29 18:45:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:55,030 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-29 18:45:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 18:45:55,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-11-29 18:45:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:55,032 INFO L225 Difference]: With dead ends: 55 [2020-11-29 18:45:55,032 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 18:45:55,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-11-29 18:45:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 18:45:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-29 18:45:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 18:45:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-11-29 18:45:55,040 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-11-29 18:45:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:55,040 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-11-29 18:45:55,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 18:45:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-11-29 18:45:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-29 18:45:55,041 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:55,041 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:55,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 18:45:55,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:55,242 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-11-29 18:45:55,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:55,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843746149] [2020-11-29 18:45:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-29 18:45:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843746149] [2020-11-29 18:45:55,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987134454] [2020-11-29 18:45:55,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/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 18:45:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:45:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-29 18:45:55,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:55,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 18:45:55,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957440214] [2020-11-29 18:45:55,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 18:45:55,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 18:45:55,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:45:55,930 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-11-29 18:45:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:56,195 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-29 18:45:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 18:45:56,196 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-11-29 18:45:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:56,197 INFO L225 Difference]: With dead ends: 58 [2020-11-29 18:45:56,197 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 18:45:56,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 18:45:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 18:45:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-29 18:45:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 18:45:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-29 18:45:56,205 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-11-29 18:45:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:56,205 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-29 18:45:56,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 18:45:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-29 18:45:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-29 18:45:56,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:56,207 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:56,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 18:45:56,433 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-11-29 18:45:56,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:56,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464798399] [2020-11-29 18:45:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:56,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-29 18:45:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464798399] [2020-11-29 18:45:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136539959] [2020-11-29 18:45:57,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:57,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:45:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 18:45:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-29 18:45:57,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:57,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 18:45:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656134193] [2020-11-29 18:45:57,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 18:45:57,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:57,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 18:45:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-11-29 18:45:57,206 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-11-29 18:45:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:57,510 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-29 18:45:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 18:45:57,511 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-11-29 18:45:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:57,511 INFO L225 Difference]: With dead ends: 61 [2020-11-29 18:45:57,511 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 18:45:57,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 18:45:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 18:45:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-29 18:45:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 18:45:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-11-29 18:45:57,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-11-29 18:45:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:57,519 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-11-29 18:45:57,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 18:45:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-11-29 18:45:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-29 18:45:57,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:57,520 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:57,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:57,721 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-11-29 18:45:57,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:57,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008263987] [2020-11-29 18:45:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:57,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:57,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:57,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:57,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-29 18:45:58,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008263987] [2020-11-29 18:45:58,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246375567] [2020-11-29 18:45:58,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:45:58,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 18:45:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:45:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 18:45:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:45:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-29 18:45:58,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:45:58,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 18:45:58,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153433884] [2020-11-29 18:45:58,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 18:45:58,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:45:58,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 18:45:58,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-11-29 18:45:58,775 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-11-29 18:45:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:45:59,082 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-29 18:45:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 18:45:59,083 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-11-29 18:45:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:45:59,084 INFO L225 Difference]: With dead ends: 64 [2020-11-29 18:45:59,084 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 18:45:59,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 18:45:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 18:45:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-29 18:45:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 18:45:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-29 18:45:59,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-11-29 18:45:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:45:59,090 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-29 18:45:59,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 18:45:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-29 18:45:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 18:45:59,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:45:59,092 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:45:59,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 18:45:59,296 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:45:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:45:59,296 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-11-29 18:45:59,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:45:59,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544007514] [2020-11-29 18:45:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:45:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:45:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:45:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-29 18:45:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544007514] [2020-11-29 18:45:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437628522] [2020-11-29 18:45:59,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:00,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:46:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:46:00,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 18:46:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:46:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-29 18:46:00,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:46:00,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 18:46:00,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640763066] [2020-11-29 18:46:00,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 18:46:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:46:00,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 18:46:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-11-29 18:46:00,146 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-11-29 18:46:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:46:00,405 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-29 18:46:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 18:46:00,406 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-11-29 18:46:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:46:00,406 INFO L225 Difference]: With dead ends: 67 [2020-11-29 18:46:00,407 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 18:46:00,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 18:46:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 18:46:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-29 18:46:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 18:46:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-11-29 18:46:00,414 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-11-29 18:46:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:46:00,414 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-11-29 18:46:00,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 18:46:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-11-29 18:46:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-29 18:46:00,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:46:00,415 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:46:00,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 18:46:00,629 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:46:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:46:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-11-29 18:46:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:46:00,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450806371] [2020-11-29 18:46:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:46:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:00,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-29 18:46:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450806371] [2020-11-29 18:46:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734685434] [2020-11-29 18:46:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:01,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-29 18:46:01,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:46:01,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 18:46:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:46:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-29 18:46:01,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:46:01,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 18:46:01,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74694096] [2020-11-29 18:46:01,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 18:46:01,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:46:01,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 18:46:01,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:46:01,699 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-11-29 18:46:02,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:46:02,051 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-29 18:46:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 18:46:02,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-11-29 18:46:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:46:02,053 INFO L225 Difference]: With dead ends: 70 [2020-11-29 18:46:02,053 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 18:46:02,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 18:46:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 18:46:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-29 18:46:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 18:46:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-11-29 18:46:02,062 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-11-29 18:46:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:46:02,063 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-11-29 18:46:02,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 18:46:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-11-29 18:46:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-29 18:46:02,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:46:02,065 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:46:02,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 18:46:02,285 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:46:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:46:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-11-29 18:46:02,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:46:02,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92837101] [2020-11-29 18:46:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:46:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:02,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:03,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-29 18:46:03,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92837101] [2020-11-29 18:46:03,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814647702] [2020-11-29 18:46:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:03,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 18:46:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:46:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 18:46:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:46:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-29 18:46:03,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:46:03,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-29 18:46:03,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302722437] [2020-11-29 18:46:03,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 18:46:03,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:46:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 18:46:03,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:46:03,370 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-11-29 18:46:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:46:03,744 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-29 18:46:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 18:46:03,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2020-11-29 18:46:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:46:03,746 INFO L225 Difference]: With dead ends: 73 [2020-11-29 18:46:03,746 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 18:46:03,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 18:46:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 18:46:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-11-29 18:46:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-29 18:46:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-11-29 18:46:03,753 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-11-29 18:46:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:46:03,754 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-11-29 18:46:03,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 18:46:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-11-29 18:46:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-29 18:46:03,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:46:03,755 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:46:03,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:03,971 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:46:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:46:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-11-29 18:46:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:46:03,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682051281] [2020-11-29 18:46:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:46:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-29 18:46:04,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682051281] [2020-11-29 18:46:04,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073909588] [2020-11-29 18:46:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 18:46:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:46:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-29 18:46:05,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:46:05,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-29 18:46:05,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731308306] [2020-11-29 18:46:05,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 18:46:05,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:46:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 18:46:05,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-11-29 18:46:05,143 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-11-29 18:46:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:46:05,536 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-11-29 18:46:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 18:46:05,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-11-29 18:46:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:46:05,537 INFO L225 Difference]: With dead ends: 76 [2020-11-29 18:46:05,538 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 18:46:05,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 18:46:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 18:46:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-29 18:46:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 18:46:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-11-29 18:46:05,544 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-11-29 18:46:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:46:05,544 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-11-29 18:46:05,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 18:46:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-11-29 18:46:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-29 18:46:05,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:46:05,546 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:46:05,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:05,761 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:46:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:46:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-11-29 18:46:05,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:46:05,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503989263] [2020-11-29 18:46:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:46:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:05,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:08,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:46:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-11-29 18:46:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503989263] [2020-11-29 18:46:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489740508] [2020-11-29 18:46:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:46:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:46:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:46:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 177 conjunts are in the unsatisfiable core [2020-11-29 18:46:08,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:46:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2020-11-29 18:46:12,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:46:12,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 94 [2020-11-29 18:46:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417469561] [2020-11-29 18:46:12,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-29 18:46:12,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:46:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-29 18:46:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=8167, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 18:46:12,062 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 94 states. [2020-11-29 18:46:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:46:17,129 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-11-29 18:46:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-29 18:46:17,130 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 130 [2020-11-29 18:46:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:46:17,131 INFO L225 Difference]: With dead ends: 75 [2020-11-29 18:46:17,131 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 18:46:17,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3573 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1395, Invalid=18065, Unknown=0, NotChecked=0, Total=19460 [2020-11-29 18:46:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 18:46:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 18:46:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 18:46:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 18:46:17,140 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2020-11-29 18:46:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:46:17,140 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:46:17,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-29 18:46:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:46:17,140 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 18:46:17,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 18:46:17,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 20) (= ULTIMATE.start_main_~b~0 0)) [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-11-29 18:46:17,370 INFO L274 CegarLoopResult]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-11-29 18:46:17,371 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 18:46:17,371 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-11-29 18:46:17,371 INFO L270 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-11-29 18:46:17,371 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-11-29 18:46:17,371 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-11-29 18:46:17,371 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-11-29 18:46:17,371 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-11-29 18:46:17,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:46:17 BoogieIcfgContainer [2020-11-29 18:46:17,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:46:17,374 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:46:17,374 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:46:17,374 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:46:17,375 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:45:44" (3/4) ... [2020-11-29 18:46:17,377 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 18:46:17,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-11-29 18:46:17,385 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 18:46:17,386 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-29 18:46:17,386 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:46:17,386 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:46:17,425 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4ae9873e-b93b-450c-be4e-cde9eda7a714/bin/uautomizer/witness.graphml [2020-11-29 18:46:17,426 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:46:17,427 INFO L168 Benchmark]: Toolchain (without parser) took 33617.97 ms. Allocated memory was 92.3 MB in the beginning and 413.1 MB in the end (delta: 320.9 MB). Free memory was 62.4 MB in the beginning and 291.4 MB in the end (delta: -229.0 MB). Peak memory consumption was 93.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:17,427 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 92.3 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:46:17,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.24 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 62.0 MB in the beginning and 90.7 MB in the end (delta: -28.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:17,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.34 ms. Allocated memory is still 113.2 MB. Free memory was 90.7 MB in the beginning and 89.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:17,428 INFO L168 Benchmark]: Boogie Preprocessor took 37.32 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 88.6 MB in the end (delta: 558.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:46:17,429 INFO L168 Benchmark]: RCFGBuilder took 415.40 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 77.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:17,429 INFO L168 Benchmark]: TraceAbstraction took 32803.71 ms. Allocated memory was 113.2 MB in the beginning and 413.1 MB in the end (delta: 299.9 MB). Free memory was 76.5 MB in the beginning and 294.5 MB in the end (delta: -217.9 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:17,430 INFO L168 Benchmark]: Witness Printer took 51.39 ms. Allocated memory is still 413.1 MB. Free memory was 293.5 MB in the beginning and 291.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:17,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 92.3 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.24 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 62.0 MB in the beginning and 90.7 MB in the end (delta: -28.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.34 ms. Allocated memory is still 113.2 MB. Free memory was 90.7 MB in the beginning and 89.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.32 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 88.6 MB in the end (delta: 558.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 415.40 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 77.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32803.71 ms. Allocated memory was 113.2 MB in the beginning and 413.1 MB in the end (delta: 299.9 MB). Free memory was 76.5 MB in the beginning and 294.5 MB in the end (delta: -217.9 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. * Witness Printer took 51.39 ms. Allocated memory is still 413.1 MB. Free memory was 293.5 MB in the beginning and 291.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.7s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 208 SDtfs, 844 SDslu, 2078 SDs, 0 SdLazy, 3403 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2475 GetRequests, 1858 SyntacticMatches, 0 SemanticMatches, 617 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6233 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 2930 NumberOfCodeBlocks, 2930 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2889 ConstructedInterpolants, 0 QuantifiedInterpolants, 815562 SizeOfPredicates, 254 NumberOfNonLiveVariables, 4920 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 41 InterpolantComputations, 1 PerfectInterpolantSequences, 9390/17640 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...