./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/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 595c6555624af5bbcf79585a20acb2500e3eeee8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:49:43,922 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:49:43,923 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:49:43,931 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:49:43,931 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:49:43,932 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:49:43,933 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:49:43,934 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:49:43,935 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:49:43,936 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:49:43,936 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:49:43,937 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:49:43,937 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:49:43,938 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:49:43,939 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:49:43,939 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:49:43,940 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:49:43,941 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:49:43,943 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:49:43,944 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:49:43,944 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:49:43,945 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:49:43,947 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:49:43,947 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:49:43,947 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:49:43,948 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:49:43,949 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:49:43,949 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:49:43,950 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:49:43,951 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:49:43,951 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:49:43,951 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:49:43,952 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:49:43,952 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:49:43,952 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:49:43,953 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:49:43,953 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 15:49:43,963 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:49:43,963 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:49:43,963 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:49:43,964 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 15:49:43,964 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:49:43,964 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:49:43,964 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 15:49:43,965 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:49:43,965 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:49:43,966 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:49:43,966 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:49:43,967 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:49:43,967 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:49:43,967 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:49:43,967 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:49:43,967 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 15:49:43,967 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:49:43,968 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:49:43,968 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_08f23139-9062-43c4-b0f9-7a357e43aad3/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-18 15:49:43,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:49:43,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:49:44,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:49:44,000 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:49:44,001 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:49:44,001 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 15:49:44,046 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/data/8ec9e21ed/ac41c11b2de04a96bdc079e78fb7a3a1/FLAGd67a7286c [2018-11-18 15:49:44,379 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:49:44,380 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 15:49:44,386 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/data/8ec9e21ed/ac41c11b2de04a96bdc079e78fb7a3a1/FLAGd67a7286c [2018-11-18 15:49:44,804 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/data/8ec9e21ed/ac41c11b2de04a96bdc079e78fb7a3a1 [2018-11-18 15:49:44,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:49:44,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 15:49:44,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:49:44,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:49:44,811 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:49:44,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e013f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44, skipping insertion in model container [2018-11-18 15:49:44,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:49:44,830 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:49:44,933 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:49:44,935 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:49:44,945 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:49:44,953 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:49:44,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44 WrapperNode [2018-11-18 15:49:44,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:49:44,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:49:44,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:49:44,954 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:49:44,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... [2018-11-18 15:49:44,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:49:44,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:49:44,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:49:44,970 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:49:44,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:49:45,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:49:45,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:49:45,042 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-18 15:49:45,042 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-18 15:49:45,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:49:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 15:49:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 15:49:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-18 15:49:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-18 15:49:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:49:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:49:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:49:45,141 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:49:45,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:49:45 BoogieIcfgContainer [2018-11-18 15:49:45,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:49:45,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:49:45,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:49:45,145 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:49:45,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:49:44" (1/3) ... [2018-11-18 15:49:45,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a77040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:49:45, skipping insertion in model container [2018-11-18 15:49:45,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:49:44" (2/3) ... [2018-11-18 15:49:45,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a77040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:49:45, skipping insertion in model container [2018-11-18 15:49:45,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:49:45" (3/3) ... [2018-11-18 15:49:45,147 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 15:49:45,153 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:49:45,158 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 15:49:45,166 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 15:49:45,184 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:49:45,184 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:49:45,185 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:49:45,185 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:49:45,185 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:49:45,185 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:49:45,185 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:49:45,185 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:49:45,185 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:49:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-18 15:49:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 15:49:45,199 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:45,199 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:45,201 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:45,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:45,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-18 15:49:45,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:45,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:45,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:45,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:49:45,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:49:45,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:49:45,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:49:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:49:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:49:45,328 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-18 15:49:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:45,386 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-18 15:49:45,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:49:45,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 15:49:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:45,394 INFO L225 Difference]: With dead ends: 44 [2018-11-18 15:49:45,394 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 15:49:45,396 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:49:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 15:49:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 15:49:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 15:49:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-18 15:49:45,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-18 15:49:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:45,426 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-18 15:49:45,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:49:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-18 15:49:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 15:49:45,428 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:45,428 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:45,428 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:45,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-18 15:49:45,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:45,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:45,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:45,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:49:45,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:49:45,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:49:45,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:49:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:49:45,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:49:45,469 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-18 15:49:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:45,531 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-18 15:49:45,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:49:45,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 15:49:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:45,532 INFO L225 Difference]: With dead ends: 36 [2018-11-18 15:49:45,532 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 15:49:45,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:49:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 15:49:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 15:49:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 15:49:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-18 15:49:45,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-18 15:49:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:45,539 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-18 15:49:45,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:49:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-18 15:49:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 15:49:45,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:45,540 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:45,541 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:45,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-18 15:49:45,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:45,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:49:45,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:45,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:45,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:45,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:49:45,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:45,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-18 15:49:45,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 15:49:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:49:45,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-18 15:49:45,726 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-18 15:49:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:45,860 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-18 15:49:45,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:49:45,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-18 15:49:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:45,861 INFO L225 Difference]: With dead ends: 58 [2018-11-18 15:49:45,861 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 15:49:45,862 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:49:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 15:49:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-18 15:49:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 15:49:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-18 15:49:45,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-18 15:49:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:45,867 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-18 15:49:45,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 15:49:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-18 15:49:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 15:49:45,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:45,869 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-18 15:49:45,869 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:45,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-18 15:49:45,870 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:45,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:45,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:45,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:49:45,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:45,920 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:45,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:45,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:49:45,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:45,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 15:49:45,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:49:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:49:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 15:49:45,962 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-18 15:49:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:46,041 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-18 15:49:46,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:49:46,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-18 15:49:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:46,043 INFO L225 Difference]: With dead ends: 43 [2018-11-18 15:49:46,043 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 15:49:46,043 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 15:49:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 15:49:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-18 15:49:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 15:49:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-18 15:49:46,053 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-18 15:49:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:46,054 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-18 15:49:46,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:49:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-18 15:49:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 15:49:46,055 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:46,055 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2018-11-18 15:49:46,055 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:46,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:46,056 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-18 15:49:46,056 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:46,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:46,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 15:49:46,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:46,117 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:46,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 15:49:46,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:46,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-18 15:49:46,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:49:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:49:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:49:46,201 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-18 15:49:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:46,354 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-18 15:49:46,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:49:46,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-18 15:49:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:46,355 INFO L225 Difference]: With dead ends: 70 [2018-11-18 15:49:46,355 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 15:49:46,356 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:49:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 15:49:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 15:49:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 15:49:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-18 15:49:46,361 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-18 15:49:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:46,361 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-18 15:49:46,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:49:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-18 15:49:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 15:49:46,362 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:46,362 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2018-11-18 15:49:46,362 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:46,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:46,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-18 15:49:46,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:46,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:46,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:49:46,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:46,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:46,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 15:49:46,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:46,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-18 15:49:46,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:49:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:49:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:49:46,480 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-18 15:49:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:46,575 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-18 15:49:46,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:49:46,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-18 15:49:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:46,577 INFO L225 Difference]: With dead ends: 61 [2018-11-18 15:49:46,577 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 15:49:46,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:49:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 15:49:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-18 15:49:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 15:49:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-18 15:49:46,586 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-18 15:49:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:46,586 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-18 15:49:46,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:49:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-18 15:49:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-18 15:49:46,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:46,588 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 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] [2018-11-18 15:49:46,589 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:46,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-18 15:49:46,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:46,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:46,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 15:49:46,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:46,642 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:46,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 15:49:46,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:46,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-18 15:49:46,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:49:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:49:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:49:46,716 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-18 15:49:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:46,802 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-18 15:49:46,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:49:46,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-18 15:49:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:46,804 INFO L225 Difference]: With dead ends: 71 [2018-11-18 15:49:46,804 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 15:49:46,805 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:49:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 15:49:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-18 15:49:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 15:49:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-18 15:49:46,815 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-18 15:49:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:46,815 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-18 15:49:46,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:49:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-18 15:49:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 15:49:46,819 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:46,819 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:46,819 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:46,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:46,819 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-18 15:49:46,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:46,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:46,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:46,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-18 15:49:46,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:46,928 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:46,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:49:46,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:49:46,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:46,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-18 15:49:47,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:47,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-18 15:49:47,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 15:49:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 15:49:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:49:47,079 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-18 15:49:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:47,450 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-18 15:49:47,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 15:49:47,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-18 15:49:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:47,453 INFO L225 Difference]: With dead ends: 146 [2018-11-18 15:49:47,453 INFO L226 Difference]: Without dead ends: 103 [2018-11-18 15:49:47,455 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-18 15:49:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-18 15:49:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-18 15:49:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-18 15:49:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-18 15:49:47,469 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-18 15:49:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:47,470 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-18 15:49:47,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 15:49:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-18 15:49:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-18 15:49:47,473 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:47,473 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:47,473 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:47,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2059253460, now seen corresponding path program 1 times [2018-11-18 15:49:47,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:47,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:47,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:47,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:49:47,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 66 proven. 113 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-18 15:49:47,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:47,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:47,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:47,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 42 proven. 134 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2018-11-18 15:49:47,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:47,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-18 15:49:47,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 15:49:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 15:49:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:49:47,746 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-18 15:49:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:48,223 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2018-11-18 15:49:48,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 15:49:48,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2018-11-18 15:49:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:48,225 INFO L225 Difference]: With dead ends: 239 [2018-11-18 15:49:48,225 INFO L226 Difference]: Without dead ends: 158 [2018-11-18 15:49:48,226 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2018-11-18 15:49:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-18 15:49:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-11-18 15:49:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-18 15:49:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 243 transitions. [2018-11-18 15:49:48,245 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 243 transitions. Word has length 135 [2018-11-18 15:49:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:48,245 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 243 transitions. [2018-11-18 15:49:48,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 15:49:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 243 transitions. [2018-11-18 15:49:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-18 15:49:48,247 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:48,248 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:48,248 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:48,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash -789289505, now seen corresponding path program 2 times [2018-11-18 15:49:48,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:48,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:48,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:48,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:48,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 169 proven. 13 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-11-18 15:49:48,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:48,363 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:48,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:49:48,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:49:48,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:48,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 83 proven. 92 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-18 15:49:48,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:48,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2018-11-18 15:49:48,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 15:49:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 15:49:48,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:49:48,505 INFO L87 Difference]: Start difference. First operand 139 states and 243 transitions. Second operand 17 states. [2018-11-18 15:49:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:48,909 INFO L93 Difference]: Finished difference Result 349 states and 782 transitions. [2018-11-18 15:49:48,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 15:49:48,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2018-11-18 15:49:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:48,912 INFO L225 Difference]: With dead ends: 349 [2018-11-18 15:49:48,913 INFO L226 Difference]: Without dead ends: 201 [2018-11-18 15:49:48,914 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 15:49:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-18 15:49:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2018-11-18 15:49:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-18 15:49:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 309 transitions. [2018-11-18 15:49:48,930 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 309 transitions. Word has length 150 [2018-11-18 15:49:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:48,931 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 309 transitions. [2018-11-18 15:49:48,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 15:49:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 309 transitions. [2018-11-18 15:49:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-18 15:49:48,933 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:48,933 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:48,934 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:48,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash -950882599, now seen corresponding path program 1 times [2018-11-18 15:49:48,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:48,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:48,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:48,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:49:48,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 85 proven. 85 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-11-18 15:49:48,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:48,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:49,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:49,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2018-11-18 15:49:49,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:49,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2018-11-18 15:49:49,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 15:49:49,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 15:49:49,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:49:49,123 INFO L87 Difference]: Start difference. First operand 174 states and 309 transitions. Second operand 13 states. [2018-11-18 15:49:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:49,360 INFO L93 Difference]: Finished difference Result 341 states and 649 transitions. [2018-11-18 15:49:49,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 15:49:49,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 152 [2018-11-18 15:49:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:49,362 INFO L225 Difference]: With dead ends: 341 [2018-11-18 15:49:49,362 INFO L226 Difference]: Without dead ends: 133 [2018-11-18 15:49:49,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-11-18 15:49:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-18 15:49:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2018-11-18 15:49:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-18 15:49:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2018-11-18 15:49:49,370 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 152 [2018-11-18 15:49:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:49,371 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2018-11-18 15:49:49,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 15:49:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2018-11-18 15:49:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-18 15:49:49,372 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:49,373 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:49,373 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:49,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2018-11-18 15:49:49,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:49,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:49,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:49,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:49,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-18 15:49:49,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:49,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:49,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:49:49,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 15:49:49,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:49,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 109 proven. 27 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-11-18 15:49:49,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:49,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-11-18 15:49:49,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:49:49,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:49:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:49:49,518 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand 10 states. [2018-11-18 15:49:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:49,593 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2018-11-18 15:49:49,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:49:49,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2018-11-18 15:49:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:49,595 INFO L225 Difference]: With dead ends: 134 [2018-11-18 15:49:49,595 INFO L226 Difference]: Without dead ends: 127 [2018-11-18 15:49:49,596 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:49:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-18 15:49:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2018-11-18 15:49:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-18 15:49:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2018-11-18 15:49:49,604 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 150 [2018-11-18 15:49:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:49,604 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2018-11-18 15:49:49,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:49:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2018-11-18 15:49:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-18 15:49:49,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:49,607 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:49,608 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:49,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:49,608 INFO L82 PathProgramCache]: Analyzing trace with hash -678687486, now seen corresponding path program 4 times [2018-11-18 15:49:49,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:49,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:49,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:49,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:49:49,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 250 proven. 120 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked. [2018-11-18 15:49:49,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:49,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:49,767 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:49:49,793 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:49:49,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:49,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 250 proven. 118 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-11-18 15:49:49,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:49,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2018-11-18 15:49:49,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:49:49,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:49:49,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:49:49,858 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand 14 states. [2018-11-18 15:49:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:49,951 INFO L93 Difference]: Finished difference Result 132 states and 174 transitions. [2018-11-18 15:49:49,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:49:49,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 218 [2018-11-18 15:49:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:49,952 INFO L225 Difference]: With dead ends: 132 [2018-11-18 15:49:49,953 INFO L226 Difference]: Without dead ends: 125 [2018-11-18 15:49:49,953 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:49:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-18 15:49:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-11-18 15:49:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-18 15:49:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2018-11-18 15:49:49,958 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 218 [2018-11-18 15:49:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:49,959 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2018-11-18 15:49:49,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:49:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2018-11-18 15:49:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-18 15:49:49,960 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:49,961 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:49,961 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:49,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash -455828779, now seen corresponding path program 5 times [2018-11-18 15:49:49,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:49,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:49,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:49,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:49:49,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 157 proven. 290 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-11-18 15:49:50,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:50,090 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:50,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:49:50,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-18 15:49:50,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:50,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 612 proven. 126 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2018-11-18 15:49:50,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:50,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2018-11-18 15:49:50,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 15:49:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 15:49:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:49:50,214 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 17 states. [2018-11-18 15:49:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:50,582 INFO L93 Difference]: Finished difference Result 298 states and 434 transitions. [2018-11-18 15:49:50,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 15:49:50,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2018-11-18 15:49:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:50,584 INFO L225 Difference]: With dead ends: 298 [2018-11-18 15:49:50,584 INFO L226 Difference]: Without dead ends: 171 [2018-11-18 15:49:50,585 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 15:49:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-18 15:49:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2018-11-18 15:49:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-11-18 15:49:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2018-11-18 15:49:50,593 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 204 [2018-11-18 15:49:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:50,593 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2018-11-18 15:49:50,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 15:49:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2018-11-18 15:49:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-18 15:49:50,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:50,595 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:50,595 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:50,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 6 times [2018-11-18 15:49:50,595 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:50,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:50,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:50,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:49:50,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-18 15:49:50,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:50,977 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:50,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:49:51,013 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-18 15:49:51,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:51,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-18 15:49:51,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:51,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-18 15:49:51,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 15:49:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 15:49:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 15:49:51,376 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand 36 states. [2018-11-18 15:49:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:51,634 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2018-11-18 15:49:51,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 15:49:51,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-11-18 15:49:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:51,636 INFO L225 Difference]: With dead ends: 185 [2018-11-18 15:49:51,636 INFO L226 Difference]: Without dead ends: 178 [2018-11-18 15:49:51,636 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2018-11-18 15:49:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-18 15:49:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2018-11-18 15:49:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-11-18 15:49:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 231 transitions. [2018-11-18 15:49:51,644 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 231 transitions. Word has length 177 [2018-11-18 15:49:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:51,645 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 231 transitions. [2018-11-18 15:49:51,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 15:49:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 231 transitions. [2018-11-18 15:49:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-18 15:49:51,646 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:51,646 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:51,646 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:51,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1843327003, now seen corresponding path program 7 times [2018-11-18 15:49:51,647 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:51,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:51,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:51,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:49:51,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 163 proven. 4 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2018-11-18 15:49:51,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:51,686 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:51,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:51,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 185 proven. 33 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-11-18 15:49:51,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:51,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2018-11-18 15:49:51,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:49:51,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:49:51,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:49:51,798 INFO L87 Difference]: Start difference. First operand 164 states and 231 transitions. Second operand 12 states. [2018-11-18 15:49:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:51,924 INFO L93 Difference]: Finished difference Result 308 states and 447 transitions. [2018-11-18 15:49:51,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:49:51,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2018-11-18 15:49:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:51,925 INFO L225 Difference]: With dead ends: 308 [2018-11-18 15:49:51,925 INFO L226 Difference]: Without dead ends: 153 [2018-11-18 15:49:51,927 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-11-18 15:49:51,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-18 15:49:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2018-11-18 15:49:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-18 15:49:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 197 transitions. [2018-11-18 15:49:51,935 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 197 transitions. Word has length 178 [2018-11-18 15:49:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:51,936 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 197 transitions. [2018-11-18 15:49:51,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:49:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 197 transitions. [2018-11-18 15:49:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-11-18 15:49:51,937 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:49:51,937 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 14, 13, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:49:51,938 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:49:51,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:49:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash 974415386, now seen corresponding path program 8 times [2018-11-18 15:49:51,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:49:51,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:49:51,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:51,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:49:51,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:49:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:49:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 115 proven. 305 refuted. 0 times theorem prover too weak. 1161 trivial. 0 not checked. [2018-11-18 15:49:52,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:49:52,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:49:52,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:49:52,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:49:52,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:49:52,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:49:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 115 proven. 305 refuted. 0 times theorem prover too weak. 1161 trivial. 0 not checked. [2018-11-18 15:49:52,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:49:52,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-11-18 15:49:52,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 15:49:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 15:49:52,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2018-11-18 15:49:52,248 INFO L87 Difference]: Start difference. First operand 148 states and 197 transitions. Second operand 19 states. [2018-11-18 15:49:52,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:49:52,547 INFO L93 Difference]: Finished difference Result 288 states and 407 transitions. [2018-11-18 15:49:52,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 15:49:52,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 244 [2018-11-18 15:49:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:49:52,548 INFO L225 Difference]: With dead ends: 288 [2018-11-18 15:49:52,548 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:49:52,549 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2018-11-18 15:49:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:49:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:49:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:49:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:49:52,549 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-11-18 15:49:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:49:52,549 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:49:52,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 15:49:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:49:52,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:49:52,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 15:49:52,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,766 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,772 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,777 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,783 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,788 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,790 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,797 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,805 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,815 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,820 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,822 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,833 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,855 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,857 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,862 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:52,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:49:53,093 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2018-11-18 15:49:53,377 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 28 [2018-11-18 15:49:53,379 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 15:49:53,379 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:49:53,379 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:49:53,379 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 15:49:53,379 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:49:53,379 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:49:53,379 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-18 15:49:53,379 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L421 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L428 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-18 15:49:53,380 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (< 2 |fibo2_#in~n|) (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L421 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (<= 6 |fibo2_#in~n|)) (<= fibo2_~n |fibo2_#in~n|) (< 4 |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-18 15:49:53,380 INFO L425 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L428 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-18 15:49:53,381 INFO L421 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n) (or (< 5 |fibo1_#in~n|) (<= |fibo1_#in~n| 3))) [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L421 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse1 (<= fibo1_~n |fibo1_#in~n|)) (.cse0 (<= |fibo1_#in~n| 2))) (let ((.cse3 (and .cse1 (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) .cse0 (<= |fibo1_#t~ret0| 1)))) (and (or (< 5 |fibo1_#in~n|) .cse0) (let ((.cse2 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse1 (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) .cse2) (and .cse1 (<= 7 |fibo1_#in~n|) .cse2) .cse3)) (or .cse3 (< 4 |fibo1_#in~n|))))) [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-18 15:49:53,381 INFO L425 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-18 15:49:53,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:49:53 BoogieIcfgContainer [2018-11-18 15:49:53,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:49:53,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:49:53,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:49:53,384 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:49:53,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:49:45" (3/4) ... [2018-11-18 15:49:53,388 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:49:53,393 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:49:53,394 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:49:53,394 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-18 15:49:53,394 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-18 15:49:53,397 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 15:49:53,397 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 15:49:53,398 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:49:53,430 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_08f23139-9062-43c4-b0f9-7a357e43aad3/bin-2019/uautomizer/witness.graphml [2018-11-18 15:49:53,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:49:53,431 INFO L168 Benchmark]: Toolchain (without parser) took 8624.76 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 388.0 MB). Free memory was 959.1 MB in the beginning and 901.5 MB in the end (delta: 57.6 MB). Peak memory consumption was 445.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:49:53,432 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:49:53,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.03 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:49:53,432 INFO L168 Benchmark]: Boogie Preprocessor took 15.32 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:49:53,433 INFO L168 Benchmark]: RCFGBuilder took 172.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -164.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-18 15:49:53,433 INFO L168 Benchmark]: TraceAbstraction took 8241.68 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 262.7 MB). Free memory was 1.1 GB in the beginning and 901.5 MB in the end (delta: 209.0 MB). Peak memory consumption was 471.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:49:53,433 INFO L168 Benchmark]: Witness Printer took 46.65 ms. Allocated memory is still 1.4 GB. Free memory is still 901.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:49:53,434 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.03 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.32 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 172.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -164.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8241.68 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 262.7 MB). Free memory was 1.1 GB in the beginning and 901.5 MB in the end (delta: 209.0 MB). Peak memory consumption was 471.6 MB. Max. memory is 11.5 GB. * Witness Printer took 46.65 ms. Allocated memory is still 1.4 GB. Free memory is still 901.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 8.2s OverallTime, 17 OverallIterations, 18 TraceHistogramMax, 3.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 534 SDtfs, 662 SDslu, 4379 SDs, 0 SdLazy, 4414 SolverSat, 661 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2201 GetRequests, 1860 SyntacticMatches, 18 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=10, 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, 17 MinimizatonAttempts, 171 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 611 PreInvPairs, 1010 NumberOfFragments, 136 HoareAnnotationTreeSize, 611 FomulaSimplifications, 15982 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4514 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 3775 NumberOfCodeBlocks, 3526 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 3743 ConstructedInterpolants, 0 QuantifiedInterpolants, 1044813 SizeOfPredicates, 71 NumberOfNonLiveVariables, 3601 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 12945/15568 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...