./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.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_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 45294379b83c6b60e0b0199955cdf7244f057430 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2018-10-26 23:34:48,313 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:34:48,315 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:34:48,326 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:34:48,326 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:34:48,327 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:34:48,328 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:34:48,330 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:34:48,332 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:34:48,334 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:34:48,334 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:34:48,335 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:34:48,336 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:34:48,337 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:34:48,338 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:34:48,339 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:34:48,340 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:34:48,342 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:34:48,344 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:34:48,346 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:34:48,347 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:34:48,348 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:34:48,351 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:34:48,352 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:34:48,352 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:34:48,353 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:34:48,354 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:34:48,355 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:34:48,356 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:34:48,357 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:34:48,357 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:34:48,358 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:34:48,358 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:34:48,359 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:34:48,360 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:34:48,360 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:34:48,361 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 23:34:48,375 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:34:48,376 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:34:48,377 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:34:48,377 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 23:34:48,378 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 23:34:48,378 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 23:34:48,379 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 23:34:48,379 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:34:48,379 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:34:48,379 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:34:48,380 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:34:48,380 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:34:48,380 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:34:48,380 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:34:48,381 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:34:48,381 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:34:48,383 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:34:48,383 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:34:48,383 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:34:48,383 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:34:48,384 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:34:48,384 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:34:48,384 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:34:48,385 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:34:48,385 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:34:48,385 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:34:48,385 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 23:34:48,385 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:34:48,386 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:34:48,386 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_7702fa56-78d1-4177-b35e-da168009f207/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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2018-10-26 23:34:48,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:34:48,432 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:34:48,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:34:48,436 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:34:48,436 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:34:48,437 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c [2018-10-26 23:34:48,490 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/data/1bced1d52/193b1d7cff1947968f4b771678986646/FLAG6fe7bc640 [2018-10-26 23:34:48,903 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:34:48,904 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c [2018-10-26 23:34:48,912 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/data/1bced1d52/193b1d7cff1947968f4b771678986646/FLAG6fe7bc640 [2018-10-26 23:34:48,932 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/data/1bced1d52/193b1d7cff1947968f4b771678986646 [2018-10-26 23:34:48,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:34:48,938 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:34:48,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:34:48,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:34:48,946 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:34:48,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:34:48" (1/1) ... [2018-10-26 23:34:48,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77053e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:48, skipping insertion in model container [2018-10-26 23:34:48,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:34:48" (1/1) ... [2018-10-26 23:34:48,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:34:48,990 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:34:49,163 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:34:49,172 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:34:49,192 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:34:49,207 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:34:49,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49 WrapperNode [2018-10-26 23:34:49,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:34:49,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:34:49,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:34:49,208 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:34:49,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... [2018-10-26 23:34:49,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:34:49,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:34:49,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:34:49,247 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:34:49,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:49,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:34:49,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:34:49,388 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-10-26 23:34:49,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:34:49,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 23:34:49,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-10-26 23:34:49,389 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-10-26 23:34:49,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-26 23:34:49,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:34:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-26 23:34:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-26 23:34:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-26 23:34:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:34:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:34:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-10-26 23:34:49,968 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:34:49,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:34:49 BoogieIcfgContainer [2018-10-26 23:34:49,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:34:49,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:34:49,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:34:49,973 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:34:49,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:34:48" (1/3) ... [2018-10-26 23:34:49,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa626bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:34:49, skipping insertion in model container [2018-10-26 23:34:49,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:34:49" (2/3) ... [2018-10-26 23:34:49,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa626bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:34:49, skipping insertion in model container [2018-10-26 23:34:49,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:34:49" (3/3) ... [2018-10-26 23:34:49,977 INFO L112 eAbstractionObserver]: Analyzing ICFG test24_false-unreach-call.c [2018-10-26 23:34:49,987 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:34:49,995 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:34:50,012 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:34:50,048 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 23:34:50,049 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:34:50,049 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:34:50,049 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:34:50,050 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:34:50,050 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:34:50,050 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:34:50,050 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:34:50,051 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:34:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-10-26 23:34:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-26 23:34:50,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:50,092 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:50,094 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:50,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash 668273826, now seen corresponding path program 1 times [2018-10-26 23:34:50,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:50,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:50,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:50,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:50,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:34:50,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 23:34:50,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 23:34:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 23:34:50,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:34:50,264 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2018-10-26 23:34:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:50,285 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2018-10-26 23:34:50,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 23:34:50,287 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-10-26 23:34:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:50,297 INFO L225 Difference]: With dead ends: 68 [2018-10-26 23:34:50,297 INFO L226 Difference]: Without dead ends: 33 [2018-10-26 23:34:50,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:34:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-26 23:34:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-26 23:34:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 23:34:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-26 23:34:50,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2018-10-26 23:34:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:50,338 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-26 23:34:50,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 23:34:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-26 23:34:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 23:34:50,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:50,339 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:50,340 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:50,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash 577953026, now seen corresponding path program 1 times [2018-10-26 23:34:50,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:50,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:50,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:50,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:50,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:34:50,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:34:50,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:34:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:34:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:34:50,406 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 3 states. [2018-10-26 23:34:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:50,472 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-26 23:34:50,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:34:50,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-10-26 23:34:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:50,474 INFO L225 Difference]: With dead ends: 59 [2018-10-26 23:34:50,474 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 23:34:50,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:34:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 23:34:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2018-10-26 23:34:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-26 23:34:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-26 23:34:50,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 27 [2018-10-26 23:34:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:50,482 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-26 23:34:50,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:34:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-26 23:34:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 23:34:50,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:50,483 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:50,483 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:50,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash 701201730, now seen corresponding path program 1 times [2018-10-26 23:34:50,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:50,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:50,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:50,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:50,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:50,597 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:50,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:50,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:50,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:50,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-26 23:34:50,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:34:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:34:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:34:50,809 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 5 states. [2018-10-26 23:34:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:50,901 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-26 23:34:50,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 23:34:50,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-10-26 23:34:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:50,903 INFO L225 Difference]: With dead ends: 66 [2018-10-26 23:34:50,903 INFO L226 Difference]: Without dead ends: 47 [2018-10-26 23:34:50,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:34:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-26 23:34:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2018-10-26 23:34:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 23:34:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-26 23:34:50,911 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 34 [2018-10-26 23:34:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:50,911 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-26 23:34:50,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:34:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-26 23:34:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 23:34:50,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:50,913 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:50,914 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:50,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1674188034, now seen corresponding path program 2 times [2018-10-26 23:34:50,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:50,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:50,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:50,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:51,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:51,149 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 23:34:51,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:34:51,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:34:51,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:51,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:51,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:51,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-26 23:34:51,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:34:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:34:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:34:51,272 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 6 states. [2018-10-26 23:34:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:51,337 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2018-10-26 23:34:51,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:34:51,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-10-26 23:34:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:51,340 INFO L225 Difference]: With dead ends: 73 [2018-10-26 23:34:51,340 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 23:34:51,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:34:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 23:34:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2018-10-26 23:34:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-26 23:34:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-26 23:34:51,350 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 41 [2018-10-26 23:34:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:51,350 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-26 23:34:51,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:34:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-26 23:34:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-26 23:34:51,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:51,353 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:51,354 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:51,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:51,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1248150850, now seen corresponding path program 3 times [2018-10-26 23:34:51,354 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:51,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:51,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:51,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:51,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:51,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:51,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:51,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:34:51,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 23:34:51,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:51,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:51,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:51,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-26 23:34:51,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:34:51,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:34:51,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:34:51,734 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 7 states. [2018-10-26 23:34:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:51,806 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-26 23:34:51,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:34:51,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2018-10-26 23:34:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:51,808 INFO L225 Difference]: With dead ends: 80 [2018-10-26 23:34:51,809 INFO L226 Difference]: Without dead ends: 61 [2018-10-26 23:34:51,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:34:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-26 23:34:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-10-26 23:34:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 23:34:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-26 23:34:51,819 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 48 [2018-10-26 23:34:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:51,820 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-26 23:34:51,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 23:34:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-26 23:34:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-26 23:34:51,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:51,821 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:51,821 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:51,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2051330, now seen corresponding path program 4 times [2018-10-26 23:34:51,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:51,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:51,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:51,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:51,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:51,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:51,957 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:51,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:34:52,027 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:34:52,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:52,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:52,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:52,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-26 23:34:52,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 23:34:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 23:34:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:34:52,120 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 8 states. [2018-10-26 23:34:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:52,405 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-26 23:34:52,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:34:52,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2018-10-26 23:34:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:52,407 INFO L225 Difference]: With dead ends: 87 [2018-10-26 23:34:52,407 INFO L226 Difference]: Without dead ends: 68 [2018-10-26 23:34:52,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:34:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-26 23:34:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2018-10-26 23:34:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 23:34:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-26 23:34:52,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 55 [2018-10-26 23:34:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:52,416 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-26 23:34:52,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 23:34:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-26 23:34:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 23:34:52,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:52,419 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:52,419 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:52,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1447103810, now seen corresponding path program 5 times [2018-10-26 23:34:52,420 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:52,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:52,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:52,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:52,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:52,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:52,532 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:52,542 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:34:52,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 23:34:52,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:52,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:52,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:52,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-26 23:34:52,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 23:34:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 23:34:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:34:52,821 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2018-10-26 23:34:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:53,231 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2018-10-26 23:34:53,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 23:34:53,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2018-10-26 23:34:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:53,242 INFO L225 Difference]: With dead ends: 94 [2018-10-26 23:34:53,243 INFO L226 Difference]: Without dead ends: 75 [2018-10-26 23:34:53,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:34:53,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-26 23:34:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2018-10-26 23:34:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-26 23:34:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-26 23:34:53,251 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 62 [2018-10-26 23:34:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:53,252 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-26 23:34:53,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 23:34:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-26 23:34:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-26 23:34:53,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:53,255 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:53,256 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:53,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -487422718, now seen corresponding path program 6 times [2018-10-26 23:34:53,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:53,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:53,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:53,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:53,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:53,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:53,516 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:53,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:34:53,648 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 23:34:53,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:53,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:53,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:53,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-26 23:34:53,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 23:34:53,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 23:34:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:34:53,716 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 10 states. [2018-10-26 23:34:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:53,775 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-26 23:34:53,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 23:34:53,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2018-10-26 23:34:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:53,777 INFO L225 Difference]: With dead ends: 101 [2018-10-26 23:34:53,777 INFO L226 Difference]: Without dead ends: 82 [2018-10-26 23:34:53,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:34:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-26 23:34:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2018-10-26 23:34:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-26 23:34:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-26 23:34:53,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 69 [2018-10-26 23:34:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:53,787 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-26 23:34:53,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 23:34:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-26 23:34:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-26 23:34:53,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:53,788 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:53,789 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:53,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1910428994, now seen corresponding path program 7 times [2018-10-26 23:34:53,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:53,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:53,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:53,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:53,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:54,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:54,021 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:54,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:54,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:54,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:54,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-26 23:34:54,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 23:34:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 23:34:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:34:54,139 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 11 states. [2018-10-26 23:34:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:54,199 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-26 23:34:54,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 23:34:54,200 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2018-10-26 23:34:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:54,201 INFO L225 Difference]: With dead ends: 108 [2018-10-26 23:34:54,202 INFO L226 Difference]: Without dead ends: 89 [2018-10-26 23:34:54,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:34:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-26 23:34:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2018-10-26 23:34:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-26 23:34:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-26 23:34:54,210 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 76 [2018-10-26 23:34:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:54,211 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-26 23:34:54,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 23:34:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-26 23:34:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-26 23:34:54,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:54,212 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:54,212 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:54,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash -675037950, now seen corresponding path program 8 times [2018-10-26 23:34:54,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:54,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:54,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:54,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:34:54,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:55,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:55,082 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:55,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:34:55,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:34:55,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:55,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:55,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:55,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-26 23:34:55,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 23:34:55,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 23:34:55,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:34:55,220 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2018-10-26 23:34:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:55,296 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-26 23:34:55,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 23:34:55,297 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2018-10-26 23:34:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:55,298 INFO L225 Difference]: With dead ends: 115 [2018-10-26 23:34:55,298 INFO L226 Difference]: Without dead ends: 96 [2018-10-26 23:34:55,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:34:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-26 23:34:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2018-10-26 23:34:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-26 23:34:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-26 23:34:55,311 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 83 [2018-10-26 23:34:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:55,312 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-26 23:34:55,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 23:34:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-26 23:34:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-26 23:34:55,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:55,313 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:55,313 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:55,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:55,313 INFO L82 PathProgramCache]: Analyzing trace with hash -507601598, now seen corresponding path program 9 times [2018-10-26 23:34:55,313 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:55,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:55,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:55,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:55,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:55,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:55,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:55,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:34:55,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 23:34:55,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:55,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:55,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:55,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-26 23:34:55,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 23:34:55,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 23:34:55,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 23:34:55,853 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 13 states. [2018-10-26 23:34:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:55,927 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-26 23:34:55,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 23:34:55,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2018-10-26 23:34:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:55,929 INFO L225 Difference]: With dead ends: 122 [2018-10-26 23:34:55,929 INFO L226 Difference]: Without dead ends: 103 [2018-10-26 23:34:55,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 23:34:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-26 23:34:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2018-10-26 23:34:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 23:34:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-26 23:34:55,936 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 90 [2018-10-26 23:34:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:55,937 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-26 23:34:55,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 23:34:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-26 23:34:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 23:34:55,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:55,938 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:55,939 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:55,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1978469118, now seen corresponding path program 10 times [2018-10-26 23:34:55,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:55,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:55,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:55,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:55,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:56,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:56,285 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:56,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:34:56,510 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:34:56,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:56,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:56,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:56,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-26 23:34:56,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 23:34:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 23:34:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 23:34:56,568 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 14 states. [2018-10-26 23:34:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:56,691 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-26 23:34:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 23:34:56,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2018-10-26 23:34:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:56,694 INFO L225 Difference]: With dead ends: 129 [2018-10-26 23:34:56,694 INFO L226 Difference]: Without dead ends: 110 [2018-10-26 23:34:56,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 23:34:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-26 23:34:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2018-10-26 23:34:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-26 23:34:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-26 23:34:56,711 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 97 [2018-10-26 23:34:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:56,711 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-26 23:34:56,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 23:34:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-26 23:34:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-26 23:34:56,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:56,713 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:56,721 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:56,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash 174089538, now seen corresponding path program 11 times [2018-10-26 23:34:56,722 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:56,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:56,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:56,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:56,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:57,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:57,540 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:57,549 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:34:57,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 23:34:57,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:34:57,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:34:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:57,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:34:57,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-26 23:34:57,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 23:34:57,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 23:34:57,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 23:34:57,901 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 15 states. [2018-10-26 23:34:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:34:57,995 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2018-10-26 23:34:57,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 23:34:57,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2018-10-26 23:34:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:34:57,996 INFO L225 Difference]: With dead ends: 136 [2018-10-26 23:34:57,996 INFO L226 Difference]: Without dead ends: 117 [2018-10-26 23:34:57,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 23:34:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-26 23:34:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2018-10-26 23:34:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-26 23:34:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-26 23:34:58,000 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 104 [2018-10-26 23:34:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:34:58,000 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-26 23:34:58,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 23:34:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-26 23:34:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-26 23:34:58,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:34:58,006 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:34:58,007 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:34:58,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:34:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2057294590, now seen corresponding path program 12 times [2018-10-26 23:34:58,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:34:58,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:34:58,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:58,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:34:58,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:34:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:34:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:34:58,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:34:58,339 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:34:58,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:35:02,361 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 23:35:02,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:02,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:02,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:02,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-26 23:35:02,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 23:35:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 23:35:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 23:35:02,416 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 16 states. [2018-10-26 23:35:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:02,536 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-26 23:35:02,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 23:35:02,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2018-10-26 23:35:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:02,538 INFO L225 Difference]: With dead ends: 143 [2018-10-26 23:35:02,538 INFO L226 Difference]: Without dead ends: 124 [2018-10-26 23:35:02,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 23:35:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-26 23:35:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2018-10-26 23:35:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-26 23:35:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-26 23:35:02,545 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 111 [2018-10-26 23:35:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:02,545 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-26 23:35:02,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 23:35:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-26 23:35:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-26 23:35:02,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:02,546 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:02,546 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:02,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:02,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1883516226, now seen corresponding path program 13 times [2018-10-26 23:35:02,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:02,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:02,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:02,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:02,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:02,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:02,848 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:02,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:02,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:02,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:02,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-26 23:35:02,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 23:35:02,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 23:35:02,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 23:35:02,927 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 17 states. [2018-10-26 23:35:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:02,989 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-26 23:35:02,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 23:35:02,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2018-10-26 23:35:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:02,992 INFO L225 Difference]: With dead ends: 150 [2018-10-26 23:35:02,992 INFO L226 Difference]: Without dead ends: 131 [2018-10-26 23:35:02,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 23:35:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-26 23:35:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2018-10-26 23:35:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-26 23:35:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-26 23:35:02,996 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 118 [2018-10-26 23:35:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:02,996 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-26 23:35:02,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 23:35:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-26 23:35:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-26 23:35:03,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:03,006 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:03,007 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:03,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash 892036354, now seen corresponding path program 14 times [2018-10-26 23:35:03,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:03,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:03,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:03,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:03,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:03,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:03,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:03,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:35:03,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:35:03,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:03,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:03,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:03,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-26 23:35:03,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 23:35:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 23:35:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 23:35:03,416 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 18 states. [2018-10-26 23:35:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:03,634 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2018-10-26 23:35:03,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 23:35:03,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2018-10-26 23:35:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:03,636 INFO L225 Difference]: With dead ends: 157 [2018-10-26 23:35:03,636 INFO L226 Difference]: Without dead ends: 138 [2018-10-26 23:35:03,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 23:35:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-26 23:35:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2018-10-26 23:35:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-26 23:35:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-26 23:35:03,643 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 125 [2018-10-26 23:35:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:03,643 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-26 23:35:03,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 23:35:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-26 23:35:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-26 23:35:03,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:03,645 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:03,645 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:03,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1209404094, now seen corresponding path program 15 times [2018-10-26 23:35:03,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:03,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:03,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:04,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:04,112 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:04,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:35:06,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 23:35:06,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:06,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:06,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:06,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-26 23:35:06,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 23:35:06,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 23:35:06,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 23:35:06,958 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 19 states. [2018-10-26 23:35:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:07,124 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-26 23:35:07,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 23:35:07,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2018-10-26 23:35:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:07,127 INFO L225 Difference]: With dead ends: 164 [2018-10-26 23:35:07,127 INFO L226 Difference]: Without dead ends: 145 [2018-10-26 23:35:07,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 23:35:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-26 23:35:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2018-10-26 23:35:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-26 23:35:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2018-10-26 23:35:07,136 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 132 [2018-10-26 23:35:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:07,136 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2018-10-26 23:35:07,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 23:35:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2018-10-26 23:35:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 23:35:07,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:07,140 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:07,141 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:07,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:07,142 INFO L82 PathProgramCache]: Analyzing trace with hash -453731070, now seen corresponding path program 16 times [2018-10-26 23:35:07,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:07,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:07,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:07,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:07,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:07,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:07,495 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:07,506 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:35:07,983 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:35:07,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:07,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:08,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:08,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-26 23:35:08,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 23:35:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 23:35:08,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 23:35:08,079 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 20 states. [2018-10-26 23:35:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:08,209 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-26 23:35:08,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 23:35:08,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2018-10-26 23:35:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:08,211 INFO L225 Difference]: With dead ends: 171 [2018-10-26 23:35:08,211 INFO L226 Difference]: Without dead ends: 152 [2018-10-26 23:35:08,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 23:35:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-26 23:35:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2018-10-26 23:35:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-26 23:35:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-26 23:35:08,216 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 139 [2018-10-26 23:35:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:08,216 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-26 23:35:08,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 23:35:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-26 23:35:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-26 23:35:08,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:08,221 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:08,221 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:08,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1512981182, now seen corresponding path program 17 times [2018-10-26 23:35:08,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:08,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:08,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:08,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:08,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:08,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:08,489 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:08,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:35:09,745 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 23:35:09,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:09,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:09,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:09,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-26 23:35:09,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 23:35:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 23:35:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 23:35:09,831 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 21 states. [2018-10-26 23:35:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:10,031 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-10-26 23:35:10,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 23:35:10,033 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2018-10-26 23:35:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:10,034 INFO L225 Difference]: With dead ends: 178 [2018-10-26 23:35:10,035 INFO L226 Difference]: Without dead ends: 159 [2018-10-26 23:35:10,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 23:35:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-26 23:35:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2018-10-26 23:35:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-26 23:35:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-10-26 23:35:10,042 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 146 [2018-10-26 23:35:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:10,042 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-10-26 23:35:10,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 23:35:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-10-26 23:35:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-26 23:35:10,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:10,044 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:10,044 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:10,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1069820670, now seen corresponding path program 18 times [2018-10-26 23:35:10,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:10,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:10,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:10,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:10,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:10,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:10,333 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:10,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:35:31,417 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 23:35:31,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:31,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:31,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:31,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-26 23:35:31,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 23:35:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 23:35:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 23:35:31,491 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 22 states. [2018-10-26 23:35:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:31,593 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-10-26 23:35:31,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 23:35:31,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2018-10-26 23:35:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:31,595 INFO L225 Difference]: With dead ends: 185 [2018-10-26 23:35:31,595 INFO L226 Difference]: Without dead ends: 166 [2018-10-26 23:35:31,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 23:35:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-26 23:35:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2018-10-26 23:35:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-26 23:35:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-26 23:35:31,600 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 153 [2018-10-26 23:35:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:31,600 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-26 23:35:31,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 23:35:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-26 23:35:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-26 23:35:31,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:31,606 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:31,606 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:31,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 511411522, now seen corresponding path program 19 times [2018-10-26 23:35:31,607 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:31,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:31,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:31,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:31,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:32,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:32,397 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/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 [2018-10-26 23:35:32,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:32,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:32,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:32,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-26 23:35:32,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 23:35:32,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 23:35:32,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 23:35:32,543 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 23 states. [2018-10-26 23:35:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:32,663 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-10-26 23:35:32,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 23:35:32,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2018-10-26 23:35:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:32,667 INFO L225 Difference]: With dead ends: 187 [2018-10-26 23:35:32,668 INFO L226 Difference]: Without dead ends: 168 [2018-10-26 23:35:32,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 23:35:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-26 23:35:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-26 23:35:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-26 23:35:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-26 23:35:32,673 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 160 [2018-10-26 23:35:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:32,676 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-26 23:35:32,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 23:35:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-26 23:35:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-26 23:35:32,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:32,678 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:32,678 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:32,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash -763294462, now seen corresponding path program 20 times [2018-10-26 23:35:32,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:32,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:32,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:32,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:32,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:35:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:35:32,823 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 23:35:32,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:35:32 BoogieIcfgContainer [2018-10-26 23:35:32,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:35:32,896 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:35:32,896 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:35:32,897 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:35:32,898 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:34:49" (3/4) ... [2018-10-26 23:35:32,900 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 23:35:32,991 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7702fa56-78d1-4177-b35e-da168009f207/bin-2019/uautomizer/witness.graphml [2018-10-26 23:35:32,992 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:35:32,993 INFO L168 Benchmark]: Toolchain (without parser) took 44055.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 193.5 MB). Free memory was 954.4 MB in the beginning and 1.0 GB in the end (delta: -48.6 MB). Peak memory consumption was 144.9 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:32,994 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:35:32,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.08 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:32,995 INFO L168 Benchmark]: Boogie Preprocessor took 37.97 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:32,995 INFO L168 Benchmark]: RCFGBuilder took 722.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:32,996 INFO L168 Benchmark]: TraceAbstraction took 42925.86 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 115.5 MB). Peak memory consumption was 161.1 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:32,996 INFO L168 Benchmark]: Witness Printer took 95.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:33,007 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 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 268.08 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.97 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 722.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 42925.86 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 115.5 MB). Peak memory consumption was 161.1 MB. Max. memory is 11.5 GB. * Witness Printer took 95.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] FCALL struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={163:0}, j=0] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=0] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=0] [L17] j++ VAL [ad1={163:0}, j=1] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=1] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=1] [L17] j++ VAL [ad1={163:0}, j=2] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=2] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=2] [L17] j++ VAL [ad1={163:0}, j=3] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=3] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=3] [L17] j++ VAL [ad1={163:0}, j=4] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=4] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=4] [L17] j++ VAL [ad1={163:0}, j=5] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=5] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=5] [L17] j++ VAL [ad1={163:0}, j=6] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=6] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=6] [L17] j++ VAL [ad1={163:0}, j=7] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=7] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=7] [L17] j++ VAL [ad1={163:0}, j=8] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=8] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=8] [L17] j++ VAL [ad1={163:0}, j=9] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=9] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=9] [L17] j++ VAL [ad1={163:0}, j=10] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=10] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=10] [L17] j++ VAL [ad1={163:0}, j=11] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=11] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=11] [L17] j++ VAL [ad1={163:0}, j=12] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=12] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=12] [L17] j++ VAL [ad1={163:0}, j=13] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=13] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=13] [L17] j++ VAL [ad1={163:0}, j=14] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=14] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=14] [L17] j++ VAL [ad1={163:0}, j=15] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=15] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=15] [L17] j++ VAL [ad1={163:0}, j=16] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=16] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=16] [L17] j++ VAL [ad1={163:0}, j=17] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=17] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=17] [L17] j++ VAL [ad1={163:0}, j=18] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=18] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=18] [L17] j++ VAL [ad1={163:0}, j=19] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=19] [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={163:0}, j=19] [L17] j++ VAL [ad1={163:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={163:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 VAL [ad1={163:0}, ad2={163:0}, i=0, j=20] [L24] FCALL ad1[i].a = i VAL [ad1={163:0}, ad2={163:0}, i=0, j=20] [L25] pa = &ad1[i].a VAL [ad1={163:0}, ad2={163:0}, i=0, j=20, pa={163:0}] [L26] EXPR, FCALL ad2[i].a VAL [ad1={163:0}, ad2={163:0}, ad2[i].a=0, i=0, j=20, pa={163:0}] [L26] i = ad2[i].a + 10 [L27] EXPR, FCALL \read(*pa) VAL [\read(*pa)=0, ad1={163:0}, ad2={163:0}, i=10, j=20, pa={163:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={163:0}] [L10] EXPR, FCALL ad1[b].a VAL [\old(b)=10, ad1={163:0}, ad1={163:0}, ad1[b].a=0, b=10] [L10] RET return ad1[b].a == b; [L30] EXPR check(ad1, i) VAL [ad1={163:0}, ad2={163:0}, check(ad1, i)=0, i=10, j=20, pa={163:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={163:0}, ad2={163:0}, i=10, j=20, pa={163:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. UNSAFE Result, 42.8s OverallTime, 22 OverallIterations, 21 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 642 SDtfs, 1050 SDslu, 5014 SDs, 0 SdLazy, 1139 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2076 GetRequests, 1847 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=21, 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: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 95 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 31.2s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 3904 NumberOfCodeBlocks, 3904 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 3697 ConstructedInterpolants, 0 QuantifiedInterpolants, 1044409 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3743 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/16720 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...