./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 12:40:36,196 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:40:36,197 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:40:36,205 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:40:36,205 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:40:36,205 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:40:36,206 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:40:36,207 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:40:36,208 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:40:36,209 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:40:36,209 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:40:36,209 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:40:36,210 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:40:36,211 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:40:36,212 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:40:36,212 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:40:36,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:40:36,214 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:40:36,215 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:40:36,216 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:40:36,216 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:40:36,217 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:40:36,219 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:40:36,219 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:40:36,219 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:40:36,220 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:40:36,220 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:40:36,221 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:40:36,221 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:40:36,222 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:40:36,222 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:40:36,222 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:40:36,223 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:40:36,223 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:40:36,223 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:40:36,224 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:40:36,224 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 12:40:36,231 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:40:36,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:40:36,232 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:40:36,232 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:40:36,233 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:40:36,233 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:40:36,233 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:40:36,233 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:40:36,233 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:40:36,233 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:40:36,233 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:40:36,234 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:40:36,235 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:40:36,235 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:40:36,235 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:40:36,235 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 12:40:36,235 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:40:36,235 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:40:36,235 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:40:36,236 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:40:36,236 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:40:36,236 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:40:36,236 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 12:40:36,236 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/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(__VERIFIER_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 -> 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b [2018-11-10 12:40:36,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:40:36,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:40:36,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:40:36,277 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:40:36,277 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:40:36,278 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c [2018-11-10 12:40:36,326 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/data/9607791f6/1c4b2a117c98422c9baa46b1241b2201/FLAGdf667fc5e [2018-11-10 12:40:36,660 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:40:36,660 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c [2018-11-10 12:40:36,665 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/data/9607791f6/1c4b2a117c98422c9baa46b1241b2201/FLAGdf667fc5e [2018-11-10 12:40:36,678 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/data/9607791f6/1c4b2a117c98422c9baa46b1241b2201 [2018-11-10 12:40:36,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:40:36,682 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 12:40:36,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:40:36,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:40:36,686 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:40:36,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9d5d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36, skipping insertion in model container [2018-11-10 12:40:36,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:40:36,713 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:40:36,827 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:40:36,830 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:40:36,841 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:40:36,851 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:40:36,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36 WrapperNode [2018-11-10 12:40:36,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:40:36,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:40:36,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:40:36,852 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:40:36,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... [2018-11-10 12:40:36,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:40:36,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:40:36,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:40:36,870 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:40:36,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/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 [2018-11-10 12:40:36,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 12:40:36,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:40:36,950 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-10 12:40:36,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 12:40:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 12:40:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 12:40:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-10 12:40:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 12:40:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 12:40:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:40:37,039 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:40:37,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:37 BoogieIcfgContainer [2018-11-10 12:40:37,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:40:37,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 12:40:37,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 12:40:37,043 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 12:40:37,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:40:36" (1/3) ... [2018-11-10 12:40:37,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e7e1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:40:37, skipping insertion in model container [2018-11-10 12:40:37,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:36" (2/3) ... [2018-11-10 12:40:37,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e7e1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:40:37, skipping insertion in model container [2018-11-10 12:40:37,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:37" (3/3) ... [2018-11-10 12:40:37,046 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20_false-unreach-call_true-termination.c [2018-11-10 12:40:37,054 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 12:40:37,059 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 12:40:37,068 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 12:40:37,090 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:40:37,090 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 12:40:37,091 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 12:40:37,091 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 12:40:37,091 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:40:37,091 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:40:37,091 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 12:40:37,091 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:40:37,091 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 12:40:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 12:40:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 12:40:37,107 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:37,107 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:37,109 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:37,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 12:40:37,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:37,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:37,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:37,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:37,228 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:40:37,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 12:40:37,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 12:40:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 12:40:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:40:37,240 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 12:40:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:37,301 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 12:40:37,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:40:37,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 12:40:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:37,310 INFO L225 Difference]: With dead ends: 30 [2018-11-10 12:40:37,310 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 12:40:37,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:40:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 12:40:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 12:40:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 12:40:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 12:40:37,339 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 12:40:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:37,339 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 12:40:37,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 12:40:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 12:40:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 12:40:37,341 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:37,341 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:37,341 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:37,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 12:40:37,342 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:37,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:37,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:37,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:40:37,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:37,387 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:37,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:37,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:40:37,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:37,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 12:40:37,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 12:40:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 12:40:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:40:37,467 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 12:40:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:37,547 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 12:40:37,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 12:40:37,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 12:40:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:37,548 INFO L225 Difference]: With dead ends: 25 [2018-11-10 12:40:37,548 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 12:40:37,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 12:40:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 12:40:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 12:40:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 12:40:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 12:40:37,554 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 12:40:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:37,555 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 12:40:37,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 12:40:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 12:40:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 12:40:37,556 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:37,556 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:37,556 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:37,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 12:40:37,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:37,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:37,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:37,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 12:40:37,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:37,625 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:37,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:40:37,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:40:37,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:37,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 12:40:37,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:37,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 12:40:37,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 12:40:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 12:40:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-10 12:40:37,687 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 12:40:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:37,739 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 12:40:37,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 12:40:37,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 12:40:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:37,740 INFO L225 Difference]: With dead ends: 28 [2018-11-10 12:40:37,740 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 12:40:37,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 12:40:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 12:40:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 12:40:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 12:40:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 12:40:37,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 12:40:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:37,746 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 12:40:37,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 12:40:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 12:40:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 12:40:37,747 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:37,747 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:37,747 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:37,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 12:40:37,748 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:37,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:37,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 12:40:37,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:37,839 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:37,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:40:37,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 12:40:37,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:37,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 12:40:37,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:37,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 12:40:37,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 12:40:37,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 12:40:37,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:40:37,904 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-10 12:40:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:37,922 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 12:40:37,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 12:40:37,923 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-10 12:40:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:37,924 INFO L225 Difference]: With dead ends: 31 [2018-11-10 12:40:37,924 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 12:40:37,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:40:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 12:40:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 12:40:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 12:40:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 12:40:37,927 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 12:40:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:37,928 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 12:40:37,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 12:40:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 12:40:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 12:40:37,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:37,929 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:37,929 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:37,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 12:40:37,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:37,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:37,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:37,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 12:40:38,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:38,016 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:38,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:40:38,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:40:38,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:38,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 12:40:38,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:38,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 12:40:38,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 12:40:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 12:40:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 12:40:38,076 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 12:40:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:38,141 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 12:40:38,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 12:40:38,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 12:40:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:38,143 INFO L225 Difference]: With dead ends: 34 [2018-11-10 12:40:38,143 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 12:40:38,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-10 12:40:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 12:40:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 12:40:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 12:40:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 12:40:38,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 12:40:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:38,148 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 12:40:38,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 12:40:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 12:40:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 12:40:38,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:38,149 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:38,149 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:38,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 12:40:38,150 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:38,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:38,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:38,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:38,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 12:40:38,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:38,269 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:38,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:40:38,288 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 12:40:38,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:38,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 12:40:38,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:38,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 12:40:38,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 12:40:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 12:40:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-10 12:40:38,316 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-10 12:40:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:38,347 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 12:40:38,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 12:40:38,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-10 12:40:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:38,349 INFO L225 Difference]: With dead ends: 37 [2018-11-10 12:40:38,349 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 12:40:38,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-10 12:40:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 12:40:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 12:40:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 12:40:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 12:40:38,353 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 12:40:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:38,353 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 12:40:38,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 12:40:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 12:40:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 12:40:38,354 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:38,355 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:38,355 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:38,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:38,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 12:40:38,355 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:38,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:38,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:38,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:38,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 12:40:38,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:38,497 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:38,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:40:38,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 12:40:38,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:38,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 12:40:38,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:38,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-11-10 12:40:38,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 12:40:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 12:40:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-11-10 12:40:38,650 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-11-10 12:40:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:38,874 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 12:40:38,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 12:40:38,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-11-10 12:40:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:38,875 INFO L225 Difference]: With dead ends: 40 [2018-11-10 12:40:38,875 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 12:40:38,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 12:40:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 12:40:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 12:40:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 12:40:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 12:40:38,879 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 12:40:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:38,879 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 12:40:38,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 12:40:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 12:40:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 12:40:38,880 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:38,880 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:38,880 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:38,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-10 12:40:38,880 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:38,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:38,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:38,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:38,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 12:40:38,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:38,983 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:38,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:39,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 12:40:39,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:39,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-11-10 12:40:39,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 12:40:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 12:40:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-11-10 12:40:39,146 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-11-10 12:40:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:39,389 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 12:40:39,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 12:40:39,390 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-11-10 12:40:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:39,391 INFO L225 Difference]: With dead ends: 43 [2018-11-10 12:40:39,391 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 12:40:39,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 12:40:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 12:40:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 12:40:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 12:40:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 12:40:39,397 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 12:40:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:39,397 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 12:40:39,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 12:40:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 12:40:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 12:40:39,398 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:39,398 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:39,399 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:39,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:39,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-10 12:40:39,399 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:39,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:39,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 12:40:39,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:39,489 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:39,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:40:39,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:40:39,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:39,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 12:40:39,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:39,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 12:40:39,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 12:40:39,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 12:40:39,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 12:40:39,542 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 12:40:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:39,611 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 12:40:39,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 12:40:39,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 12:40:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:39,612 INFO L225 Difference]: With dead ends: 46 [2018-11-10 12:40:39,612 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 12:40:39,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-10 12:40:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 12:40:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 12:40:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 12:40:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 12:40:39,616 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 12:40:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:39,617 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 12:40:39,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 12:40:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 12:40:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 12:40:39,618 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:39,618 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:39,618 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:39,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-10 12:40:39,618 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:39,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:39,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 12:40:39,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:39,710 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:39,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:40:39,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 12:40:39,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:39,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 12:40:40,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:40,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-11-10 12:40:40,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-10 12:40:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-10 12:40:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 12:40:40,004 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-11-10 12:40:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:40,280 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 12:40:40,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 12:40:40,280 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-11-10 12:40:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:40,281 INFO L225 Difference]: With dead ends: 49 [2018-11-10 12:40:40,281 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 12:40:40,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 12:40:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 12:40:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 12:40:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 12:40:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 12:40:40,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 12:40:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:40,285 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 12:40:40,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-10 12:40:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 12:40:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 12:40:40,285 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:40,285 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:40,285 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:40,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-10 12:40:40,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:40,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:40,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:40,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:40,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 12:40:40,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:40,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:40,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:40:40,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:40:40,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:40,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 12:40:40,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:40,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 12:40:40,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 12:40:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 12:40:40,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-10 12:40:40,442 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 12:40:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:40,549 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 12:40:40,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 12:40:40,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 12:40:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:40,550 INFO L225 Difference]: With dead ends: 52 [2018-11-10 12:40:40,551 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 12:40:40,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-10 12:40:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 12:40:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 12:40:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 12:40:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 12:40:40,555 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 12:40:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:40,555 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 12:40:40,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 12:40:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 12:40:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 12:40:40,557 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:40,557 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:40,557 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:40,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-10 12:40:40,558 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:40,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:40,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:40,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:40,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 12:40:40,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:40,657 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:40,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:40:40,682 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-10 12:40:40,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:40,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 12:40:40,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:40,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 12:40:40,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 12:40:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 12:40:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-10 12:40:40,724 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 12:40:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:40,862 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 12:40:40,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 12:40:40,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 12:40:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:40,866 INFO L225 Difference]: With dead ends: 55 [2018-11-10 12:40:40,867 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 12:40:40,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-10 12:40:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 12:40:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 12:40:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 12:40:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 12:40:40,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 12:40:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:40,875 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 12:40:40,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 12:40:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 12:40:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 12:40:40,876 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:40,876 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:40,876 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:40,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-10 12:40:40,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:40,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:40,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:40,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:40,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 12:40:41,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:41,091 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:41,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:40:41,129 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-10 12:40:41,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:41,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 12:40:41,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:41,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-10 12:40:41,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 12:40:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 12:40:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-10 12:40:41,162 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-11-10 12:40:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:41,206 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 12:40:41,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 12:40:41,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-11-10 12:40:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:41,207 INFO L225 Difference]: With dead ends: 58 [2018-11-10 12:40:41,207 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 12:40:41,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-10 12:40:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 12:40:41,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 12:40:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 12:40:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 12:40:41,211 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 12:40:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:41,211 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 12:40:41,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 12:40:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 12:40:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 12:40:41,212 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:41,212 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:41,212 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:41,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-10 12:40:41,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:41,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:41,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:41,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:41,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 12:40:41,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:41,475 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:41,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:41,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 12:40:41,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:41,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-11-10 12:40:41,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-10 12:40:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-10 12:40:41,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 12:40:41,780 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-11-10 12:40:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:42,228 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 12:40:42,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 12:40:42,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-11-10 12:40:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:42,229 INFO L225 Difference]: With dead ends: 61 [2018-11-10 12:40:42,229 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 12:40:42,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-11-10 12:40:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 12:40:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 12:40:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 12:40:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 12:40:42,234 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 12:40:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:42,235 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 12:40:42,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-10 12:40:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 12:40:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 12:40:42,236 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:42,236 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:42,236 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:42,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-10 12:40:42,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:42,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:42,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:42,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:42,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 12:40:42,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:42,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:42,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:40:42,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:40:42,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:42,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 12:40:42,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:42,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-11-10 12:40:42,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-10 12:40:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-10 12:40:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 12:40:42,786 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-11-10 12:40:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:43,265 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 12:40:43,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-10 12:40:43,265 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-11-10 12:40:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:43,266 INFO L225 Difference]: With dead ends: 64 [2018-11-10 12:40:43,266 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 12:40:43,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-11-10 12:40:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 12:40:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 12:40:43,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 12:40:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 12:40:43,273 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 12:40:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:43,274 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 12:40:43,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-10 12:40:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 12:40:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 12:40:43,275 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:43,275 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:43,275 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:43,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:43,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-10 12:40:43,276 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:43,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:43,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:43,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:43,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 12:40:43,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:43,549 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:43,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:40:43,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-10 12:40:43,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:43,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 12:40:43,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:43,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2018-11-10 12:40:43,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-10 12:40:43,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-10 12:40:43,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 12:40:43,881 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 53 states. [2018-11-10 12:40:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:44,390 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-10 12:40:44,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-10 12:40:44,390 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-11-10 12:40:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:44,391 INFO L225 Difference]: With dead ends: 67 [2018-11-10 12:40:44,391 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 12:40:44,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=5694, Unknown=0, NotChecked=0, Total=6972 [2018-11-10 12:40:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 12:40:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-10 12:40:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 12:40:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-10 12:40:44,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-10 12:40:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:44,396 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-10 12:40:44,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-10 12:40:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-10 12:40:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 12:40:44,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:44,397 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:44,397 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:44,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-10 12:40:44,398 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:44,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:44,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 12:40:44,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:44,658 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:44,664 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:40:44,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:40:44,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:44,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 12:40:45,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:45,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2018-11-10 12:40:45,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-10 12:40:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-10 12:40:45,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2579, Unknown=0, NotChecked=0, Total=3080 [2018-11-10 12:40:45,006 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 56 states. [2018-11-10 12:40:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:45,579 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-10 12:40:45,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-10 12:40:45,579 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-11-10 12:40:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:45,580 INFO L225 Difference]: With dead ends: 70 [2018-11-10 12:40:45,580 INFO L226 Difference]: Without dead ends: 66 [2018-11-10 12:40:45,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1434, Invalid=6398, Unknown=0, NotChecked=0, Total=7832 [2018-11-10 12:40:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-10 12:40:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-10 12:40:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 12:40:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-10 12:40:45,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-10 12:40:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:45,585 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-10 12:40:45,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-10 12:40:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-10 12:40:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-10 12:40:45,585 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:45,585 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:45,585 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:45,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-10 12:40:45,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:45,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:45,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:45,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:45,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 12:40:45,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:45,771 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:45,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:40:45,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-10 12:40:45,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:45,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 12:40:46,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:46,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2018-11-10 12:40:46,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-10 12:40:46,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-10 12:40:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2018-11-10 12:40:46,307 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2018-11-10 12:40:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:46,931 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-10 12:40:46,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-10 12:40:46,932 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-11-10 12:40:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:46,932 INFO L225 Difference]: With dead ends: 73 [2018-11-10 12:40:46,932 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 12:40:46,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2018-11-10 12:40:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 12:40:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-10 12:40:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-10 12:40:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-10 12:40:46,937 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-10 12:40:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:46,937 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-10 12:40:46,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-10 12:40:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-10 12:40:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-10 12:40:46,938 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:46,938 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:46,938 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:46,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-10 12:40:46,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:46,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:46,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:46,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:46,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 12:40:47,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:47,138 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:47,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:40:47,174 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-10 12:40:47,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:47,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 12:40:47,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:47,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2018-11-10 12:40:47,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-10 12:40:47,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-10 12:40:47,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2018-11-10 12:40:47,699 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2018-11-10 12:40:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:48,388 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-10 12:40:48,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-10 12:40:48,389 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-11-10 12:40:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:48,389 INFO L225 Difference]: With dead ends: 76 [2018-11-10 12:40:48,389 INFO L226 Difference]: Without dead ends: 72 [2018-11-10 12:40:48,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2018-11-10 12:40:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-10 12:40:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-10 12:40:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-10 12:40:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-10 12:40:48,398 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-10 12:40:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:48,398 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-10 12:40:48,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-10 12:40:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-10 12:40:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-10 12:40:48,399 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:48,399 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:48,399 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:48,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:48,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-10 12:40:48,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:48,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:48,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:48,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:40:48,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 12:40:48,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:40:48,584 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:40:48,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:48,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 12:40:48,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:48,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-10 12:40:48,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 12:40:48,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 12:40:48,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-10 12:40:48,653 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-10 12:40:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:48,885 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-10 12:40:48,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 12:40:48,885 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-10 12:40:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:48,886 INFO L225 Difference]: With dead ends: 79 [2018-11-10 12:40:48,886 INFO L226 Difference]: Without dead ends: 75 [2018-11-10 12:40:48,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 12:40:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-10 12:40:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-10 12:40:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-10 12:40:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-10 12:40:48,890 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-10 12:40:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:48,890 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-10 12:40:48,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 12:40:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-10 12:40:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-10 12:40:48,891 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:48,891 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:48,891 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:48,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:48,891 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-10 12:40:48,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:48,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:48,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:48,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:48,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:40:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:40:48,919 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 12:40:48,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 12:40:48 BoogieIcfgContainer [2018-11-10 12:40:48,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 12:40:48,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:40:48,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:40:48,947 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:40:48,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:37" (3/4) ... [2018-11-10 12:40:48,950 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 12:40:48,997 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5b6d8ad6-5007-469f-abee-64975b28a95b/bin-2019/uautomizer/witness.graphml [2018-11-10 12:40:48,997 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:40:48,998 INFO L168 Benchmark]: Toolchain (without parser) took 12317.32 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 303.0 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -134.3 MB). Peak memory consumption was 168.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:49,000 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:40:49,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.97 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:49,001 INFO L168 Benchmark]: Boogie Preprocessor took 17.87 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:40:49,001 INFO L168 Benchmark]: RCFGBuilder took 169.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -184.8 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:49,001 INFO L168 Benchmark]: TraceAbstraction took 11906.53 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 160.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.6 MB). Peak memory consumption was 200.0 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:49,002 INFO L168 Benchmark]: Witness Printer took 50.47 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:40:49,003 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.97 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.87 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 169.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -184.8 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11906.53 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 160.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.6 MB). Peak memory consumption was 200.0 MB. Max. memory is 11.5 GB. * Witness Printer took 50.47 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 11.8s OverallTime, 21 OverallIterations, 21 TraceHistogramMax, 5.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 261 SDtfs, 347 SDslu, 3966 SDs, 0 SdLazy, 2237 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2150 GetRequests, 1321 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9629 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 547176 SizeOfPredicates, 158 NumberOfNonLiveVariables, 3268 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...