./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 6f330f622534898bf170bbd5a7ac37bee3deb574 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 21:01:45,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:01:45,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:01:45,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:01:45,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:01:45,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:01:45,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:01:45,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:01:45,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:01:45,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:01:45,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:01:45,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:01:45,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:01:45,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:01:45,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:01:45,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:01:45,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:01:45,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:01:45,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:01:45,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:01:45,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:01:45,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:01:45,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:01:45,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:01:45,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:01:45,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:01:45,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:01:45,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:01:45,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:01:45,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:01:45,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:01:45,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:01:45,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:01:45,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:01:45,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:01:45,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:01:45,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:01:45,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:01:45,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:01:45,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:01:45,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:01:45,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:01:45,081 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:01:45,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:01:45,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:01:45,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:01:45,083 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:01:45,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:01:45,084 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:01:45,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:01:45,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:01:45,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:01:45,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:01:45,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:01:45,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:01:45,085 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:01:45,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:01:45,086 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:01:45,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:01:45,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:01:45,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:01:45,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:01:45,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:01:45,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:01:45,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:01:45,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:01:45,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:01:45,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:01:45,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:01:45,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:01:45,089 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_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 -> 6f330f622534898bf170bbd5a7ac37bee3deb574 [2019-11-15 21:01:45,114 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:01:45,123 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:01:45,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:01:45,128 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:01:45,128 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:01:45,128 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2019-11-15 21:01:45,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/data/a7166a623/b9c66cf0c00d4eaf86b16a4d691a2ce0/FLAG19e968751 [2019-11-15 21:01:45,596 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:01:45,597 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2019-11-15 21:01:45,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/data/a7166a623/b9c66cf0c00d4eaf86b16a4d691a2ce0/FLAG19e968751 [2019-11-15 21:01:45,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/data/a7166a623/b9c66cf0c00d4eaf86b16a4d691a2ce0 [2019-11-15 21:01:45,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:01:45,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:01:45,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:01:45,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:01:45,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:01:45,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14997bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45, skipping insertion in model container [2019-11-15 21:01:45,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,632 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:01:45,646 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:01:45,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:01:45,840 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:01:45,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:01:45,869 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:01:45,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45 WrapperNode [2019-11-15 21:01:45,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:01:45,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:01:45,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:01:45,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:01:45,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:01:45,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:01:45,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:01:45,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:01:45,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... [2019-11-15 21:01:45,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:01:45,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:01:45,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:01:45,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:01:45,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 [2019-11-15 21:01:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-15 21:01:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-15 21:01:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:01:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:01:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-15 21:01:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-15 21:01:46,234 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:01:46,234 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 21:01:46,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:01:46 BoogieIcfgContainer [2019-11-15 21:01:46,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:01:46,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:01:46,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:01:46,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:01:46,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:01:45" (1/3) ... [2019-11-15 21:01:46,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf48d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:01:46, skipping insertion in model container [2019-11-15 21:01:46,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:01:45" (2/3) ... [2019-11-15 21:01:46,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf48d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:01:46, skipping insertion in model container [2019-11-15 21:01:46,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:01:46" (3/3) ... [2019-11-15 21:01:46,246 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2019-11-15 21:01:46,256 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:01:46,266 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:01:46,285 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:01:46,318 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:01:46,318 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:01:46,318 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:01:46,320 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:01:46,321 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:01:46,321 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:01:46,321 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:01:46,322 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:01:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-15 21:01:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 21:01:46,351 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:46,351 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:46,355 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash -394807891, now seen corresponding path program 1 times [2019-11-15 21:01:46,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:46,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846758574] [2019-11-15 21:01:46,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:46,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:46,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:01:46,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846758574] [2019-11-15 21:01:46,630 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:01:46,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 21:01:46,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273160977] [2019-11-15 21:01:46,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:01:46,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:01:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:01:46,646 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-15 21:01:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:46,700 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-15 21:01:46,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:01:46,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-15 21:01:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:46,709 INFO L225 Difference]: With dead ends: 35 [2019-11-15 21:01:46,709 INFO L226 Difference]: Without dead ends: 22 [2019-11-15 21:01:46,712 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:01:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-15 21:01:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-15 21:01:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 21:01:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-15 21:01:46,750 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-15 21:01:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:46,750 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-15 21:01:46,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:01:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-15 21:01:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 21:01:46,752 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:46,752 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:46,752 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1343664860, now seen corresponding path program 1 times [2019-11-15 21:01:46,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:46,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212795316] [2019-11-15 21:01:46,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:46,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:46,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:01:46,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212795316] [2019-11-15 21:01:46,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:01:46,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 21:01:46,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38003245] [2019-11-15 21:01:46,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:01:46,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:46,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:01:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:01:46,883 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-11-15 21:01:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:46,919 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-15 21:01:46,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:01:46,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-15 21:01:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:46,921 INFO L225 Difference]: With dead ends: 28 [2019-11-15 21:01:46,921 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 21:01:46,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:01:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 21:01:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-15 21:01:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 21:01:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-15 21:01:46,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-11-15 21:01:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:46,927 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-15 21:01:46,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:01:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-15 21:01:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 21:01:46,928 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:46,928 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:46,929 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1372294011, now seen corresponding path program 1 times [2019-11-15 21:01:46,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:46,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909250314] [2019-11-15 21:01:46,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:46,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:46,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:01:47,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909250314] [2019-11-15 21:01:47,159 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:01:47,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-15 21:01:47,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452459835] [2019-11-15 21:01:47,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 21:01:47,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 21:01:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:01:47,161 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-11-15 21:01:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:47,261 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-15 21:01:47,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 21:01:47,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-15 21:01:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:47,263 INFO L225 Difference]: With dead ends: 44 [2019-11-15 21:01:47,263 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 21:01:47,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:01:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 21:01:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-15 21:01:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 21:01:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-15 21:01:47,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-11-15 21:01:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:47,269 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-15 21:01:47,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 21:01:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-15 21:01:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 21:01:47,270 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:47,270 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:47,271 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash -971845561, now seen corresponding path program 1 times [2019-11-15 21:01:47,271 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:47,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47638918] [2019-11-15 21:01:47,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:47,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:47,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 21:01:47,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47638918] [2019-11-15 21:01:47,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:01:47,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 21:01:47,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443219889] [2019-11-15 21:01:47,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:01:47,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:01:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:01:47,393 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-11-15 21:01:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:47,411 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-15 21:01:47,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:01:47,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-15 21:01:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:47,412 INFO L225 Difference]: With dead ends: 46 [2019-11-15 21:01:47,412 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 21:01:47,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:01:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 21:01:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-15 21:01:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 21:01:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-15 21:01:47,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2019-11-15 21:01:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:47,419 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-15 21:01:47,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:01:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-15 21:01:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 21:01:47,421 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:47,421 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:47,421 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1168359066, now seen corresponding path program 1 times [2019-11-15 21:01:47,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:47,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828604997] [2019-11-15 21:01:47,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:47,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:47,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 21:01:47,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828604997] [2019-11-15 21:01:47,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177790082] [2019-11-15 21:01:47,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 [2019-11-15 21:01:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:47,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 21:01:47,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:01:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 21:01:47,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:01:47,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-15 21:01:47,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598185356] [2019-11-15 21:01:47,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 21:01:47,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 21:01:47,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-15 21:01:47,862 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2019-11-15 21:01:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:48,005 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-11-15 21:01:48,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 21:01:48,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-15 21:01:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:48,007 INFO L225 Difference]: With dead ends: 60 [2019-11-15 21:01:48,007 INFO L226 Difference]: Without dead ends: 40 [2019-11-15 21:01:48,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-15 21:01:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-15 21:01:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-11-15 21:01:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 21:01:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-15 21:01:48,015 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-11-15 21:01:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:48,016 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-15 21:01:48,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 21:01:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-15 21:01:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 21:01:48,018 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:48,018 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:48,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:01:48,223 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:48,223 INFO L82 PathProgramCache]: Analyzing trace with hash -222974932, now seen corresponding path program 1 times [2019-11-15 21:01:48,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:48,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469363033] [2019-11-15 21:01:48,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:48,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:48,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:01:48,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469363033] [2019-11-15 21:01:48,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438435756] [2019-11-15 21:01:48,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 [2019-11-15 21:01:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:48,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-15 21:01:48,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:01:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:01:48,717 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:01:48,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-15 21:01:48,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541704516] [2019-11-15 21:01:48,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 21:01:48,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:48,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 21:01:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-11-15 21:01:48,719 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2019-11-15 21:01:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:48,910 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2019-11-15 21:01:48,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 21:01:48,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-11-15 21:01:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:48,912 INFO L225 Difference]: With dead ends: 68 [2019-11-15 21:01:48,912 INFO L226 Difference]: Without dead ends: 48 [2019-11-15 21:01:48,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-15 21:01:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-15 21:01:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-15 21:01:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 21:01:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-15 21:01:48,927 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-11-15 21:01:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:48,928 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-15 21:01:48,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 21:01:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-15 21:01:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 21:01:48,931 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:48,932 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:49,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:01:49,135 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:49,135 INFO L82 PathProgramCache]: Analyzing trace with hash -141607649, now seen corresponding path program 2 times [2019-11-15 21:01:49,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:49,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570464201] [2019-11-15 21:01:49,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:49,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:49,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 21:01:49,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570464201] [2019-11-15 21:01:49,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517683675] [2019-11-15 21:01:49,524 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 [2019-11-15 21:01:49,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:01:49,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:01:49,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-15 21:01:49,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:01:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 21:01:49,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:01:49,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-15 21:01:49,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086734162] [2019-11-15 21:01:49,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 21:01:49,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 21:01:49,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-11-15 21:01:49,646 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 18 states. [2019-11-15 21:01:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:49,898 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-11-15 21:01:49,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 21:01:49,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-11-15 21:01:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:49,900 INFO L225 Difference]: With dead ends: 76 [2019-11-15 21:01:49,900 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 21:01:49,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-11-15 21:01:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 21:01:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2019-11-15 21:01:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 21:01:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-15 21:01:49,906 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 37 [2019-11-15 21:01:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:49,907 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-15 21:01:49,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 21:01:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-15 21:01:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-15 21:01:49,908 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:01:49,908 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:01:50,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:01:50,112 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:01:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:01:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash -90623267, now seen corresponding path program 2 times [2019-11-15 21:01:50,113 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:01:50,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452497299] [2019-11-15 21:01:50,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:50,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:01:50,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:01:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:01:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-15 21:01:50,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452497299] [2019-11-15 21:01:50,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394875296] [2019-11-15 21:01:50,569 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/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 [2019-11-15 21:01:50,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-15 21:01:50,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:01:50,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:01:50,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:01:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-15 21:01:50,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:01:50,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [20] total 23 [2019-11-15 21:01:50,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207610331] [2019-11-15 21:01:50,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:01:50,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:01:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:01:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-11-15 21:01:50,731 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2019-11-15 21:01:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:01:50,749 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-15 21:01:50,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:01:50,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-11-15 21:01:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:01:50,750 INFO L225 Difference]: With dead ends: 42 [2019-11-15 21:01:50,750 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 21:01:50,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-11-15 21:01:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 21:01:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 21:01:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 21:01:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 21:01:50,752 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-11-15 21:01:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:01:50,752 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 21:01:50,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:01:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 21:01:50,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 21:01:50,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:01:50,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 21:01:50,968 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-11-15 21:01:50,968 INFO L446 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2019-11-15 21:01:50,968 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-15 21:01:50,968 INFO L443 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-11-15 21:01:50,968 INFO L443 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2019-11-15 21:01:50,968 INFO L446 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2019-11-15 21:01:50,968 INFO L443 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2019-11-15 21:01:50,968 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L446 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 27) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2019-11-15 21:01:50,969 INFO L443 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-15 21:01:50,970 INFO L446 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2019-11-15 21:01:50,970 INFO L443 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-11-15 21:01:50,970 INFO L443 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-11-15 21:01:50,970 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2019-11-15 21:01:50,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:01:50 BoogieIcfgContainer [2019-11-15 21:01:50,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:01:50,974 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:01:50,974 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:01:50,974 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:01:50,975 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:01:46" (3/4) ... [2019-11-15 21:01:50,978 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 21:01:50,984 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-11-15 21:01:50,985 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-15 21:01:50,989 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 21:01:50,989 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 21:01:51,029 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_319a6e79-0be2-47fd-9c7d-b541917da7ee/bin/uautomizer/witness.graphml [2019-11-15 21:01:51,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:01:51,037 INFO L168 Benchmark]: Toolchain (without parser) took 5419.34 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 222.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -134.9 MB). Peak memory consumption was 87.9 MB. Max. memory is 11.5 GB. [2019-11-15 21:01:51,038 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:01:51,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -206.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-11-15 21:01:51,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:01:51,039 INFO L168 Benchmark]: Boogie Preprocessor took 15.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:01:51,039 INFO L168 Benchmark]: RCFGBuilder took 322.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-15 21:01:51,039 INFO L168 Benchmark]: TraceAbstraction took 4737.13 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.3 MB). Peak memory consumption was 97.5 MB. Max. memory is 11.5 GB. [2019-11-15 21:01:51,040 INFO L168 Benchmark]: Witness Printer took 61.60 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:01:51,042 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 251.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -206.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 322.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4737.13 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.3 MB). Peak memory consumption was 97.5 MB. Max. memory is 11.5 GB. * Witness Printer took 61.60 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Result: SAFE, OverallTime: 4.6s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 25 SDslu, 1327 SDs, 0 SdLazy, 412 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 187 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 8 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 332 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 36678 SizeOfPredicates, 14 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 90/150 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...