./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:21:37,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:21:37,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:21:37,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:21:37,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:21:37,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:21:38,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:21:38,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:21:38,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:21:38,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:21:38,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:21:38,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:21:38,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:21:38,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:21:38,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:21:38,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:21:38,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:21:38,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:21:38,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:21:38,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:21:38,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:21:38,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:21:38,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:21:38,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:21:38,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:21:38,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:21:38,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:21:38,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:21:38,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:21:38,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:21:38,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:21:38,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:21:38,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:21:38,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:21:38,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:21:38,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:21:38,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:21:38,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:21:38,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:21:38,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:21:38,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:21:38,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 11:21:38,035 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:21:38,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:21:38,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:21:38,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:21:38,036 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 11:21:38,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:21:38,037 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:21:38,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:21:38,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:21:38,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:21:38,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2019-12-07 11:21:38,139 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:21:38,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:21:38,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:21:38,150 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:21:38,150 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:21:38,151 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-12-07 11:21:38,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/data/2b48bca75/9640ab5cfc0d4c15ae786ea16fc7ee40/FLAG88f539b4d [2019-12-07 11:21:38,621 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:21:38,622 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-12-07 11:21:38,626 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/data/2b48bca75/9640ab5cfc0d4c15ae786ea16fc7ee40/FLAG88f539b4d [2019-12-07 11:21:38,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/data/2b48bca75/9640ab5cfc0d4c15ae786ea16fc7ee40 [2019-12-07 11:21:38,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:21:38,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:21:38,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:21:38,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:21:38,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:21:38,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c8857b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38, skipping insertion in model container [2019-12-07 11:21:38,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:21:38,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:21:38,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:21:38,767 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:21:38,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:21:38,823 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:21:38,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38 WrapperNode [2019-12-07 11:21:38,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:21:38,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:21:38,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:21:38,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:21:38,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:21:38,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:21:38,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:21:38,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:21:38,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... [2019-12-07 11:21:38,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:21:38,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:21:38,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:21:38,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:21:38,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:21:38,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:21:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:21:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-12-07 11:21:38,895 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-12-07 11:21:38,988 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:21:38,988 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 11:21:38,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:21:38 BoogieIcfgContainer [2019-12-07 11:21:38,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:21:38,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:21:38,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:21:38,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:21:38,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:21:38" (1/3) ... [2019-12-07 11:21:38,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6ed84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:21:38, skipping insertion in model container [2019-12-07 11:21:38,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:21:38" (2/3) ... [2019-12-07 11:21:38,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6ed84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:21:38, skipping insertion in model container [2019-12-07 11:21:38,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:21:38" (3/3) ... [2019-12-07 11:21:38,993 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2019-12-07 11:21:39,000 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:21:39,004 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:21:39,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:21:39,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:21:39,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:21:39,026 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:21:39,026 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:21:39,026 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:21:39,026 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:21:39,026 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:21:39,027 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:21:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-12-07 11:21:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 11:21:39,040 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:39,041 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:39,041 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-12-07 11:21:39,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:39,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889639968] [2019-12-07 11:21:39,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:21:39,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889639968] [2019-12-07 11:21:39,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:21:39,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 11:21:39,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589479309] [2019-12-07 11:21:39,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:21:39,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:21:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:21:39,181 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-12-07 11:21:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:39,237 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-12-07 11:21:39,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:21:39,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 11:21:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:39,245 INFO L225 Difference]: With dead ends: 29 [2019-12-07 11:21:39,245 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 11:21:39,247 INFO L630 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 [2019-12-07 11:21:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 11:21:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 11:21:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 11:21:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 11:21:39,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-12-07 11:21:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:39,274 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 11:21:39,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:21:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 11:21:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:21:39,275 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:39,275 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:39,275 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-12-07 11:21:39,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:39,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471643688] [2019-12-07 11:21:39,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:21:39,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471643688] [2019-12-07 11:21:39,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:21:39,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 11:21:39,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165984047] [2019-12-07 11:21:39,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:21:39,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:21:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:21:39,309 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-12-07 11:21:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:39,341 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-12-07 11:21:39,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:21:39,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 11:21:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:39,342 INFO L225 Difference]: With dead ends: 23 [2019-12-07 11:21:39,342 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 11:21:39,343 INFO L630 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 [2019-12-07 11:21:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 11:21:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-12-07 11:21:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 11:21:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 11:21:39,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-12-07 11:21:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:39,347 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 11:21:39,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:21:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 11:21:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 11:21:39,348 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:39,348 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:39,348 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-12-07 11:21:39,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:39,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818470302] [2019-12-07 11:21:39,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:21:39,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818470302] [2019-12-07 11:21:39,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094781886] [2019-12-07 11:21:39,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:21:39,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:21:39,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:39,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-12-07 11:21:39,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492008735] [2019-12-07 11:21:39,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:21:39,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:21:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:21:39,487 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 8 states. [2019-12-07 11:21:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:39,538 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-12-07 11:21:39,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 11:21:39,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-12-07 11:21:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:39,540 INFO L225 Difference]: With dead ends: 41 [2019-12-07 11:21:39,540 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:21:39,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-12-07 11:21:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:21:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-12-07 11:21:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 11:21:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-12-07 11:21:39,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-12-07 11:21:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:39,549 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-12-07 11:21:39,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:21:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-12-07 11:21:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 11:21:39,550 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:39,550 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:39,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:39,752 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-12-07 11:21:39,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:39,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655113917] [2019-12-07 11:21:39,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:21:39,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655113917] [2019-12-07 11:21:39,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366533221] [2019-12-07 11:21:39,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:39,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:21:39,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:21:39,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:39,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-12-07 11:21:39,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039112119] [2019-12-07 11:21:39,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:21:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:21:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:21:39,889 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 8 states. [2019-12-07 11:21:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:39,946 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-12-07 11:21:39,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 11:21:39,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-12-07 11:21:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:39,948 INFO L225 Difference]: With dead ends: 47 [2019-12-07 11:21:39,948 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 11:21:39,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-12-07 11:21:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 11:21:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-12-07 11:21:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 11:21:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-12-07 11:21:39,956 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-12-07 11:21:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:39,956 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-12-07 11:21:39,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:21:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-12-07 11:21:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 11:21:39,958 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:39,958 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:40,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:40,158 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-12-07 11:21:40,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:40,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249649718] [2019-12-07 11:21:40,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-07 11:21:40,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249649718] [2019-12-07 11:21:40,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541164064] [2019-12-07 11:21:40,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:40,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:21:40,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:40,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:21:40,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-07 11:21:40,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:40,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 11:21:40,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71521580] [2019-12-07 11:21:40,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:21:40,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:21:40,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:21:40,277 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 10 states. [2019-12-07 11:21:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:40,360 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-12-07 11:21:40,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 11:21:40,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-12-07 11:21:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:40,361 INFO L225 Difference]: With dead ends: 67 [2019-12-07 11:21:40,362 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 11:21:40,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-12-07 11:21:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 11:21:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-12-07 11:21:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:21:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-12-07 11:21:40,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-12-07 11:21:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:40,367 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-12-07 11:21:40,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:21:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-12-07 11:21:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 11:21:40,368 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:40,368 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:40,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:40,569 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-12-07 11:21:40,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:40,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376267792] [2019-12-07 11:21:40,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 11:21:40,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376267792] [2019-12-07 11:21:40,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207158337] [2019-12-07 11:21:40,687 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:40,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:21:40,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:40,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:21:40,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 11:21:40,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:40,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-12-07 11:21:40,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120117331] [2019-12-07 11:21:40,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:21:40,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:21:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:21:40,728 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-12-07 11:21:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:40,795 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-12-07 11:21:40,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 11:21:40,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-12-07 11:21:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:40,797 INFO L225 Difference]: With dead ends: 52 [2019-12-07 11:21:40,797 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 11:21:40,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:21:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 11:21:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-12-07 11:21:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 11:21:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-12-07 11:21:40,805 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-12-07 11:21:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:40,806 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-12-07 11:21:40,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:21:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-12-07 11:21:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 11:21:40,808 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:40,808 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:41,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:41,010 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash -99212631, now seen corresponding path program 3 times [2019-12-07 11:21:41,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:41,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747501594] [2019-12-07 11:21:41,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-12-07 11:21:41,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747501594] [2019-12-07 11:21:41,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141082850] [2019-12-07 11:21:41,243 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:41,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:21:41,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:41,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:21:41,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-12-07 11:21:41,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:41,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2019-12-07 11:21:41,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605991037] [2019-12-07 11:21:41,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 11:21:41,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 11:21:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-12-07 11:21:41,321 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 15 states. [2019-12-07 11:21:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:41,519 INFO L93 Difference]: Finished difference Result 89 states and 139 transitions. [2019-12-07 11:21:41,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 11:21:41,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-12-07 11:21:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:41,522 INFO L225 Difference]: With dead ends: 89 [2019-12-07 11:21:41,522 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 11:21:41,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-12-07 11:21:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 11:21:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-12-07 11:21:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 11:21:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-12-07 11:21:41,532 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 63 [2019-12-07 11:21:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:41,533 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-12-07 11:21:41,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 11:21:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-12-07 11:21:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 11:21:41,535 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:41,535 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:41,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:41,736 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 4 times [2019-12-07 11:21:41,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:41,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833585444] [2019-12-07 11:21:41,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-12-07 11:21:42,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833585444] [2019-12-07 11:21:42,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556391372] [2019-12-07 11:21:42,079 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:42,117 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:21:42,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:42,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-12-07 11:21:42,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-12-07 11:21:42,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:42,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2019-12-07 11:21:42,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384044762] [2019-12-07 11:21:42,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 11:21:42,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 11:21:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:21:42,306 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 20 states. [2019-12-07 11:21:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:42,443 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2019-12-07 11:21:42,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 11:21:42,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2019-12-07 11:21:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:42,451 INFO L225 Difference]: With dead ends: 71 [2019-12-07 11:21:42,451 INFO L226 Difference]: Without dead ends: 67 [2019-12-07 11:21:42,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:21:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-07 11:21:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-12-07 11:21:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 11:21:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2019-12-07 11:21:42,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 105 [2019-12-07 11:21:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:42,460 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2019-12-07 11:21:42,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 11:21:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2019-12-07 11:21:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-12-07 11:21:42,462 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:42,462 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:42,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:42,663 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1256539154, now seen corresponding path program 5 times [2019-12-07 11:21:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:42,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699345130] [2019-12-07 11:21:42,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 309 proven. 340 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-12-07 11:21:43,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699345130] [2019-12-07 11:21:43,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751533236] [2019-12-07 11:21:43,038 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:43,076 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-07 11:21:43,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:43,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 11:21:43,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 353 proven. 303 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-12-07 11:21:43,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:43,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 24 [2019-12-07 11:21:43,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737952447] [2019-12-07 11:21:43,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 11:21:43,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:43,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 11:21:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2019-12-07 11:21:43,140 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand 24 states. [2019-12-07 11:21:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:43,411 INFO L93 Difference]: Finished difference Result 123 states and 212 transitions. [2019-12-07 11:21:43,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 11:21:43,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-12-07 11:21:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:43,413 INFO L225 Difference]: With dead ends: 123 [2019-12-07 11:21:43,413 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 11:21:43,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 11:21:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 11:21:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-12-07 11:21:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 11:21:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-12-07 11:21:43,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 146 [2019-12-07 11:21:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:43,420 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-12-07 11:21:43,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 11:21:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-12-07 11:21:43,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-12-07 11:21:43,422 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:21:43,422 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1] [2019-12-07 11:21:43,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:43,624 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:21:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:21:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash 938070515, now seen corresponding path program 6 times [2019-12-07 11:21:43,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:21:43,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208213992] [2019-12-07 11:21:43,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:21:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:21:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 401 proven. 810 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-12-07 11:21:44,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208213992] [2019-12-07 11:21:44,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734737087] [2019-12-07 11:21:44,136 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:44,187 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-07 11:21:44,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:44,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 11:21:44,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:21:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 246 proven. 374 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2019-12-07 11:21:44,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:21:44,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 27 [2019-12-07 11:21:44,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223661226] [2019-12-07 11:21:44,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 11:21:44,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:21:44,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 11:21:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:21:44,280 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 27 states. [2019-12-07 11:21:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:21:44,606 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-12-07 11:21:44,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 11:21:44,607 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 214 [2019-12-07 11:21:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:21:44,607 INFO L225 Difference]: With dead ends: 115 [2019-12-07 11:21:44,607 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:21:44,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 11:21:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:21:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:21:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:21:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:21:44,609 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-12-07 11:21:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:21:44,609 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:21:44,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 11:21:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:21:44,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:21:44,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:44,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:21:45,114 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-12-07 11:21:45,155 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:21:45,155 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:21:45,155 INFO L242 CegarLoopResult]: At program point L29(lines 23 30) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-12-07 11:21:45,155 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L242 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (or (not (<= |fibo_#in~n| 4)) (< 1 fibo_~n))) [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L242 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (= fibo_~n |fibo_#in~n|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|)) (.cse5 (<= 3 fibo_~n))) (let ((.cse0 (<= |fibo_#in~n| 4)) (.cse1 (and .cse2 (<= fibo_~n 3) .cse3 .cse4 .cse5))) (and (or (not (<= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n)) .cse0) (or .cse1 (not (<= 3 |fibo_#in~n|)) (not (<= |fibo_#in~n| 3))) (or (not .cse0) .cse1 (and .cse2 .cse3 .cse4 (<= fibo_~n 2) (< 1 fibo_~n)) (and .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse5))))) [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-12-07 11:21:45,156 INFO L246 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-12-07 11:21:45,157 INFO L249 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-12-07 11:21:45,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:21:45 BoogieIcfgContainer [2019-12-07 11:21:45,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:21:45,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:21:45,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:21:45,167 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:21:45,167 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:21:38" (3/4) ... [2019-12-07 11:21:45,169 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:21:45,173 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2019-12-07 11:21:45,176 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 11:21:45,176 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:21:45,204 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d4f28bf5-d0cd-453e-ae0a-31d46e4f3328/bin/uautomizer/witness.graphml [2019-12-07 11:21:45,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:21:45,205 INFO L168 Benchmark]: Toolchain (without parser) took 6567.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Free memory was 940.8 MB in the beginning and 1.0 GB in the end (delta: -101.4 MB). Peak memory consumption was 88.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:45,206 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:45,206 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:45,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:45,206 INFO L168 Benchmark]: Boogie Preprocessor took 10.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:45,207 INFO L168 Benchmark]: RCFGBuilder took 133.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:45,207 INFO L168 Benchmark]: TraceAbstraction took 6176.94 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 85.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.2 MB). Peak memory consumption was 116.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:45,207 INFO L168 Benchmark]: Witness Printer took 37.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:45,209 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 185.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 133.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6176.94 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 85.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.2 MB). Peak memory consumption was 116.7 MB. Max. memory is 11.5 GB. * Witness Printer took 37.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 5.7s, OverallIterations: 10, TraceHistogramMax: 31, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 183 SDtfs, 419 SDslu, 822 SDs, 0 SdLazy, 1374 SolverSat, 420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 827 SyntacticMatches, 9 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 134 PreInvPairs, 157 NumberOfFragments, 125 HoareAnnotationTreeSize, 134 FomulaSimplifications, 185 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 312 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1309 NumberOfCodeBlocks, 1157 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1291 ConstructedInterpolants, 0 QuantifiedInterpolants, 365059 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 6820/9218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...