./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 14df269faa4a77275028af94d8141ab36c184cf5 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:57:18,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:18,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:18,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:18,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:18,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:18,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:18,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:18,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:18,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:18,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:18,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:18,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:18,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:18,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:18,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:18,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:18,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:18,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:18,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:18,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:18,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:18,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:18,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:18,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:18,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:18,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:18,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:18,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:18,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:18,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:18,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:18,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:18,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:18,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:18,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:18,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:18,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:18,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:18,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:18,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:18,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-10-22 08:57:18,422 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:18,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:18,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:18,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:18,424 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:18,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:18,424 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:57:18,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:18,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:18,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:18,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:18,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:18,425 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 08:57:18,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:18,426 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:18,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:18,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:18,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:18,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:18,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:18,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:18,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:18,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:18,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:18,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:18,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:18,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:18,428 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/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14df269faa4a77275028af94d8141ab36c184cf5 [2019-10-22 08:57:18,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:18,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:18,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:18,467 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:18,468 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:18,468 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-10-22 08:57:18,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/data/13c2278bd/9d18838b21c147dab8006a02a075ae53/FLAG13e94806e [2019-10-22 08:57:18,852 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:18,852 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-10-22 08:57:18,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/data/13c2278bd/9d18838b21c147dab8006a02a075ae53/FLAG13e94806e [2019-10-22 08:57:19,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/data/13c2278bd/9d18838b21c147dab8006a02a075ae53 [2019-10-22 08:57:19,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:19,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:19,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:19,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:19,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:19,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77badcef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19, skipping insertion in model container [2019-10-22 08:57:19,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,262 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:19,276 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:19,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:19,396 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:19,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:19,478 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:19,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19 WrapperNode [2019-10-22 08:57:19,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:19,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:19,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:19,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:19,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:19,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:19,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:19,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:19,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... [2019-10-22 08:57:19,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:19,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:19,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:19,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:19,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-10-22 08:57:19,594 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-10-22 08:57:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:19,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:19,794 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:19,794 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:57:19,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:19 BoogieIcfgContainer [2019-10-22 08:57:19,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:19,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:19,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:19,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:19,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:19" (1/3) ... [2019-10-22 08:57:19,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ac45ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:19, skipping insertion in model container [2019-10-22 08:57:19,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:19" (2/3) ... [2019-10-22 08:57:19,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ac45ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:19, skipping insertion in model container [2019-10-22 08:57:19,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:19" (3/3) ... [2019-10-22 08:57:19,812 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2019-10-22 08:57:19,833 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:19,840 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-10-22 08:57:19,862 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-10-22 08:57:19,904 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:19,904 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:19,904 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:19,904 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:19,904 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:19,904 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:19,904 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:19,904 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 08:57:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 08:57:19,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:19,939 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 08:57:19,940 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-10-22 08:57:19,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:19,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275178562] [2019-10-22 08:57:19,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:19,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:19,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:20,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275178562] [2019-10-22 08:57:20,105 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:20,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:20,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693969712] [2019-10-22 08:57:20,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:20,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:20,125 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-10-22 08:57:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:20,227 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-10-22 08:57:20,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:57:20,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-10-22 08:57:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:20,239 INFO L225 Difference]: With dead ends: 41 [2019-10-22 08:57:20,239 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 08:57:20,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 08:57:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-22 08:57:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:57:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-22 08:57:20,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-10-22 08:57:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:20,285 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-22 08:57:20,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-22 08:57:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 08:57:20,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:20,286 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:20,287 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-10-22 08:57:20,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:20,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130460505] [2019-10-22 08:57:20,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:20,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130460505] [2019-10-22 08:57:20,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:20,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:57:20,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376964389] [2019-10-22 08:57:20,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:20,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:20,319 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-10-22 08:57:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:20,424 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-10-22 08:57:20,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:57:20,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-10-22 08:57:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:20,428 INFO L225 Difference]: With dead ends: 50 [2019-10-22 08:57:20,428 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 08:57:20,429 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 08:57:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-10-22 08:57:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 08:57:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-10-22 08:57:20,440 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-10-22 08:57:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:20,441 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-10-22 08:57:20,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-10-22 08:57:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:57:20,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:20,441 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:20,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-10-22 08:57:20,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:20,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64966993] [2019-10-22 08:57:20,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:20,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64966993] [2019-10-22 08:57:20,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673259506] [2019-10-22 08:57:20,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:57:20,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:20,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:20,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-10-22 08:57:20,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614447192] [2019-10-22 08:57:20,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:57:20,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:57:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:20,547 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-10-22 08:57:20,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:20,675 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-10-22 08:57:20,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:57:20,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-22 08:57:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:20,677 INFO L225 Difference]: With dead ends: 63 [2019-10-22 08:57:20,677 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 08:57:20,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:57:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 08:57:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-10-22 08:57:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 08:57:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-10-22 08:57:20,697 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-10-22 08:57:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:20,697 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-10-22 08:57:20,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:57:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-10-22 08:57:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:57:20,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:20,698 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:20,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:20,900 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-10-22 08:57:20,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:20,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796854100] [2019-10-22 08:57:20,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:20,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796854100] [2019-10-22 08:57:20,935 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:20,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:57:20,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749284402] [2019-10-22 08:57:20,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:20,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:20,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:20,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:20,936 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 3 states. [2019-10-22 08:57:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:20,946 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-10-22 08:57:20,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:20,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-22 08:57:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:20,951 INFO L225 Difference]: With dead ends: 52 [2019-10-22 08:57:20,951 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 08:57:20,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 08:57:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-22 08:57:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 08:57:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-10-22 08:57:20,965 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-10-22 08:57:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:20,965 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-10-22 08:57:20,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-10-22 08:57:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:57:20,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:20,966 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:20,966 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-10-22 08:57:20,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:20,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986900439] [2019-10-22 08:57:20,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:20,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:21,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986900439] [2019-10-22 08:57:21,015 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:21,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:21,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70694150] [2019-10-22 08:57:21,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:21,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:21,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:21,017 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 4 states. [2019-10-22 08:57:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:21,038 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-10-22 08:57:21,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:57:21,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-22 08:57:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:21,040 INFO L225 Difference]: With dead ends: 77 [2019-10-22 08:57:21,040 INFO L226 Difference]: Without dead ends: 76 [2019-10-22 08:57:21,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-22 08:57:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-10-22 08:57:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-22 08:57:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2019-10-22 08:57:21,057 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 15 [2019-10-22 08:57:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:21,058 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2019-10-22 08:57:21,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2019-10-22 08:57:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:21,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:21,058 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-10-22 08:57:21,059 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-10-22 08:57:21,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:21,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650264050] [2019-10-22 08:57:21,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:21,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650264050] [2019-10-22 08:57:21,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451759054] [2019-10-22 08:57:21,137 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:21,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:57:21,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:21,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:21,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:21,170 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:21,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-22 08:57:21,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174839898] [2019-10-22 08:57:21,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:57:21,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:21,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:57:21,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:57:21,172 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 9 states. [2019-10-22 08:57:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:21,328 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-10-22 08:57:21,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:57:21,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-10-22 08:57:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:21,330 INFO L225 Difference]: With dead ends: 90 [2019-10-22 08:57:21,330 INFO L226 Difference]: Without dead ends: 89 [2019-10-22 08:57:21,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:57:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-22 08:57:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-10-22 08:57:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-22 08:57:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-10-22 08:57:21,351 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 17 [2019-10-22 08:57:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:21,352 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-10-22 08:57:21,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:57:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-10-22 08:57:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:57:21,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:21,353 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:21,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:21,554 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-10-22 08:57:21,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:21,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509920645] [2019-10-22 08:57:21,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:21,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509920645] [2019-10-22 08:57:21,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:21,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:21,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701210072] [2019-10-22 08:57:21,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:57:21,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:57:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:21,605 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 6 states. [2019-10-22 08:57:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:21,721 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-10-22 08:57:21,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:57:21,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-22 08:57:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:21,723 INFO L225 Difference]: With dead ends: 117 [2019-10-22 08:57:21,724 INFO L226 Difference]: Without dead ends: 116 [2019-10-22 08:57:21,724 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:57:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-22 08:57:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-10-22 08:57:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-22 08:57:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-10-22 08:57:21,739 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-10-22 08:57:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:21,739 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-10-22 08:57:21,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:57:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-10-22 08:57:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 08:57:21,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:21,740 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:21,741 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-10-22 08:57:21,741 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:21,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141678888] [2019-10-22 08:57:21,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:21,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141678888] [2019-10-22 08:57:21,799 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:21,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:21,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22822495] [2019-10-22 08:57:21,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:57:21,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:21,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:57:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:21,800 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-10-22 08:57:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:21,927 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2019-10-22 08:57:21,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:57:21,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-22 08:57:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:21,929 INFO L225 Difference]: With dead ends: 135 [2019-10-22 08:57:21,929 INFO L226 Difference]: Without dead ends: 134 [2019-10-22 08:57:21,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:57:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-22 08:57:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2019-10-22 08:57:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-22 08:57:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2019-10-22 08:57:21,950 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 20 [2019-10-22 08:57:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:21,950 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2019-10-22 08:57:21,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:57:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2019-10-22 08:57:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:57:21,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:21,951 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-10-22 08:57:21,952 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-10-22 08:57:21,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:21,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670879130] [2019-10-22 08:57:21,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:21,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:22,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670879130] [2019-10-22 08:57:22,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783905870] [2019-10-22 08:57:22,039 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:22,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:57:22,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:22,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:57:22,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:22,089 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:22,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-22 08:57:22,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394206418] [2019-10-22 08:57:22,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:57:22,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:57:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:57:22,091 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand 11 states. [2019-10-22 08:57:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:22,269 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2019-10-22 08:57:22,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 08:57:22,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-10-22 08:57:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:22,271 INFO L225 Difference]: With dead ends: 150 [2019-10-22 08:57:22,271 INFO L226 Difference]: Without dead ends: 149 [2019-10-22 08:57:22,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:57:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-10-22 08:57:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-10-22 08:57:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-22 08:57:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2019-10-22 08:57:22,287 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 22 [2019-10-22 08:57:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:22,287 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2019-10-22 08:57:22,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:57:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2019-10-22 08:57:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 08:57:22,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:22,288 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:22,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:22,489 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-10-22 08:57:22,490 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:22,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720716646] [2019-10-22 08:57:22,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:22,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:22,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:22,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720716646] [2019-10-22 08:57:22,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767390292] [2019-10-22 08:57:22,574 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:22,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:57:22,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:22,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:57:22,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:22,616 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:22,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-10-22 08:57:22,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855182405] [2019-10-22 08:57:22,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:57:22,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:57:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:22,620 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand 8 states. [2019-10-22 08:57:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:22,790 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2019-10-22 08:57:22,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:57:22,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-22 08:57:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:22,792 INFO L225 Difference]: With dead ends: 174 [2019-10-22 08:57:22,792 INFO L226 Difference]: Without dead ends: 173 [2019-10-22 08:57:22,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:57:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-10-22 08:57:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2019-10-22 08:57:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-22 08:57:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2019-10-22 08:57:22,818 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 25 [2019-10-22 08:57:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:22,819 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2019-10-22 08:57:22,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:57:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2019-10-22 08:57:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:57:22,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:22,823 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-10-22 08:57:23,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:23,024 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-10-22 08:57:23,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:23,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793249244] [2019-10-22 08:57:23,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:23,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793249244] [2019-10-22 08:57:23,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821054040] [2019-10-22 08:57:23,124 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:23,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:57:23,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:23,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:57:23,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-22 08:57:23,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:23,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-10-22 08:57:23,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454032933] [2019-10-22 08:57:23,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:57:23,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:23,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:57:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:57:23,190 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 14 states. [2019-10-22 08:57:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:23,283 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2019-10-22 08:57:23,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:57:23,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-10-22 08:57:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:23,286 INFO L225 Difference]: With dead ends: 165 [2019-10-22 08:57:23,286 INFO L226 Difference]: Without dead ends: 164 [2019-10-22 08:57:23,287 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:57:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-22 08:57:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-10-22 08:57:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-22 08:57:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2019-10-22 08:57:23,306 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 27 [2019-10-22 08:57:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:23,307 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2019-10-22 08:57:23,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:57:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2019-10-22 08:57:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-22 08:57:23,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,308 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:23,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:23,509 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-10-22 08:57:23,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:23,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951122453] [2019-10-22 08:57:23,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:23,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951122453] [2019-10-22 08:57:23,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304196268] [2019-10-22 08:57:23,581 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:23,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 08:57:23,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:23,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:57:23,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:23,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:23,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-10-22 08:57:23,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952000970] [2019-10-22 08:57:23,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:57:23,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:57:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:57:23,622 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 10 states. [2019-10-22 08:57:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:23,869 INFO L93 Difference]: Finished difference Result 194 states and 248 transitions. [2019-10-22 08:57:23,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:57:23,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-22 08:57:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:23,871 INFO L225 Difference]: With dead ends: 194 [2019-10-22 08:57:23,871 INFO L226 Difference]: Without dead ends: 193 [2019-10-22 08:57:23,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:57:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-10-22 08:57:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2019-10-22 08:57:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-10-22 08:57:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2019-10-22 08:57:23,886 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 30 [2019-10-22 08:57:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:23,887 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2019-10-22 08:57:23,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:57:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2019-10-22 08:57:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 08:57:23,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,888 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:24,089 INFO L410 AbstractCegarLoop]: === Iteration 13 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1629013057, now seen corresponding path program 1 times [2019-10-22 08:57:24,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960111525] [2019-10-22 08:57:24,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:24,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960111525] [2019-10-22 08:57:24,126 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:24,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:57:24,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397338616] [2019-10-22 08:57:24,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:24,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:24,127 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand 5 states. [2019-10-22 08:57:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,146 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2019-10-22 08:57:24,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:24,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-10-22 08:57:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,148 INFO L225 Difference]: With dead ends: 179 [2019-10-22 08:57:24,148 INFO L226 Difference]: Without dead ends: 178 [2019-10-22 08:57:24,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-10-22 08:57:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-10-22 08:57:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-22 08:57:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 218 transitions. [2019-10-22 08:57:24,159 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 218 transitions. Word has length 31 [2019-10-22 08:57:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,159 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 218 transitions. [2019-10-22 08:57:24,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 218 transitions. [2019-10-22 08:57:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 08:57:24,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,160 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,161 INFO L410 AbstractCegarLoop]: === Iteration 14 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash 857271516, now seen corresponding path program 4 times [2019-10-22 08:57:24,161 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076025086] [2019-10-22 08:57:24,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:24,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076025086] [2019-10-22 08:57:24,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524540325] [2019-10-22 08:57:24,238 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:24,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:57:24,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:24,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:57:24,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-22 08:57:24,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:57:24,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2019-10-22 08:57:24,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069553301] [2019-10-22 08:57:24,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:57:24,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:57:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:57:24,308 INFO L87 Difference]: Start difference. First operand 178 states and 218 transitions. Second operand 6 states. [2019-10-22 08:57:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,376 INFO L93 Difference]: Finished difference Result 239 states and 303 transitions. [2019-10-22 08:57:24,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:57:24,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-10-22 08:57:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,378 INFO L225 Difference]: With dead ends: 239 [2019-10-22 08:57:24,378 INFO L226 Difference]: Without dead ends: 111 [2019-10-22 08:57:24,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-10-22 08:57:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-22 08:57:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2019-10-22 08:57:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-22 08:57:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-10-22 08:57:24,390 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 35 [2019-10-22 08:57:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,390 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-10-22 08:57:24,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:57:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-10-22 08:57:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 08:57:24,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,392 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:24,593 INFO L410 AbstractCegarLoop]: === Iteration 15 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash -490250333, now seen corresponding path program 1 times [2019-10-22 08:57:24,593 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673553820] [2019-10-22 08:57:24,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:24,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673553820] [2019-10-22 08:57:24,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:24,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:57:24,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371802033] [2019-10-22 08:57:24,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:57:24,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:57:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:24,671 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 7 states. [2019-10-22 08:57:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,776 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-10-22 08:57:24,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:57:24,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-22 08:57:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,778 INFO L225 Difference]: With dead ends: 106 [2019-10-22 08:57:24,778 INFO L226 Difference]: Without dead ends: 105 [2019-10-22 08:57:24,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:57:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-22 08:57:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-10-22 08:57:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-22 08:57:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2019-10-22 08:57:24,790 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 35 [2019-10-22 08:57:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,790 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2019-10-22 08:57:24,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:57:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2019-10-22 08:57:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-22 08:57:24,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,792 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,793 INFO L410 AbstractCegarLoop]: === Iteration 16 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1982108899, now seen corresponding path program 1 times [2019-10-22 08:57:24,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038464853] [2019-10-22 08:57:24,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:24,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038464853] [2019-10-22 08:57:24,854 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:24,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:57:24,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992893804] [2019-10-22 08:57:24,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:57:24,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:57:24,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:24,855 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 7 states. [2019-10-22 08:57:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,956 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-10-22 08:57:24,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:57:24,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-10-22 08:57:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,958 INFO L225 Difference]: With dead ends: 124 [2019-10-22 08:57:24,958 INFO L226 Difference]: Without dead ends: 123 [2019-10-22 08:57:24,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:57:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-22 08:57:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-10-22 08:57:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-22 08:57:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2019-10-22 08:57:24,967 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 36 [2019-10-22 08:57:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,968 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2019-10-22 08:57:24,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:57:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2019-10-22 08:57:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 08:57:24,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,970 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,970 INFO L410 AbstractCegarLoop]: === Iteration 17 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,971 INFO L82 PathProgramCache]: Analyzing trace with hash -732976513, now seen corresponding path program 2 times [2019-10-22 08:57:24,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404401774] [2019-10-22 08:57:24,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:25,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404401774] [2019-10-22 08:57:25,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621890813] [2019-10-22 08:57:25,053 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/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 [2019-10-22 08:57:25,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:57:25,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:25,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:57:25,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:25,109 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:25,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-22 08:57:25,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047869689] [2019-10-22 08:57:25,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:57:25,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:57:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:57:25,110 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 9 states. [2019-10-22 08:57:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:25,285 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2019-10-22 08:57:25,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:57:25,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-10-22 08:57:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:25,286 INFO L225 Difference]: With dead ends: 140 [2019-10-22 08:57:25,286 INFO L226 Difference]: Without dead ends: 139 [2019-10-22 08:57:25,287 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:57:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-22 08:57:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-10-22 08:57:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-10-22 08:57:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2019-10-22 08:57:25,294 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 41 [2019-10-22 08:57:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:25,294 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2019-10-22 08:57:25,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:57:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2019-10-22 08:57:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-22 08:57:25,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:25,295 INFO L380 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:25,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:25,496 INFO L410 AbstractCegarLoop]: === Iteration 18 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2029893219, now seen corresponding path program 3 times [2019-10-22 08:57:25,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:25,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270911744] [2019-10-22 08:57:25,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:25,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270911744] [2019-10-22 08:57:25,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818498553] [2019-10-22 08:57:25,567 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:25,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-22 08:57:25,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:25,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:57:25,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:25,615 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:25,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-22 08:57:25,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039746973] [2019-10-22 08:57:25,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:57:25,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:57:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:57:25,617 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 11 states. [2019-10-22 08:57:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:25,861 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2019-10-22 08:57:25,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 08:57:25,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-10-22 08:57:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:25,862 INFO L225 Difference]: With dead ends: 158 [2019-10-22 08:57:25,863 INFO L226 Difference]: Without dead ends: 157 [2019-10-22 08:57:25,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2019-10-22 08:57:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-22 08:57:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-22 08:57:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-22 08:57:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-10-22 08:57:25,871 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 46 [2019-10-22 08:57:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:25,872 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-10-22 08:57:25,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:57:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-10-22 08:57:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 08:57:25,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:25,873 INFO L380 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:26,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:26,073 INFO L410 AbstractCegarLoop]: === Iteration 19 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:26,074 INFO L82 PathProgramCache]: Analyzing trace with hash -613451521, now seen corresponding path program 4 times [2019-10-22 08:57:26,074 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:26,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712114873] [2019-10-22 08:57:26,074 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:26,074 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:26,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:26,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712114873] [2019-10-22 08:57:26,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246032276] [2019-10-22 08:57:26,180 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:26,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:57:26,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:26,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 08:57:26,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:26,232 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:26,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-10-22 08:57:26,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359131656] [2019-10-22 08:57:26,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:57:26,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:57:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:57:26,233 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2019-10-22 08:57:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:26,597 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2019-10-22 08:57:26,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-22 08:57:26,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-10-22 08:57:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:26,599 INFO L225 Difference]: With dead ends: 176 [2019-10-22 08:57:26,599 INFO L226 Difference]: Without dead ends: 175 [2019-10-22 08:57:26,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 08:57:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-22 08:57:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-22 08:57:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-22 08:57:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2019-10-22 08:57:26,611 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 51 [2019-10-22 08:57:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:26,613 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2019-10-22 08:57:26,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:57:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2019-10-22 08:57:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-22 08:57:26,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:26,614 INFO L380 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:26,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:26,815 INFO L410 AbstractCegarLoop]: === Iteration 20 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:57:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1845164003, now seen corresponding path program 5 times [2019-10-22 08:57:26,816 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:26,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696293330] [2019-10-22 08:57:26,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:26,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:26,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:26,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696293330] [2019-10-22 08:57:26,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919859] [2019-10-22 08:57:26,949 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:26,983 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-22 08:57:26,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:26,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 08:57:26,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-22 08:57:27,059 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:57:27,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2019-10-22 08:57:27,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840467924] [2019-10-22 08:57:27,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:57:27,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:57:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:57:27,061 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 7 states. [2019-10-22 08:57:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:27,118 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2019-10-22 08:57:27,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:57:27,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-10-22 08:57:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:27,119 INFO L225 Difference]: With dead ends: 215 [2019-10-22 08:57:27,120 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:57:27,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:57:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:57:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:57:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:57:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:57:27,121 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-10-22 08:57:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:27,121 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:27,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:57:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:57:27,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:57:27,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:27,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:57:27,533 INFO L443 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,533 INFO L443 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-10-22 08:57:27,533 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,533 INFO L443 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,533 INFO L439 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (not (= 0 |g_#in~x|)) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-10-22 08:57:27,533 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L439 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= 0 |g_#in~x|)) (or (not (<= 0 |g_#in~x|)) (and (<= 0 g_~x) (<= g_~x 2147483647) (<= |g_#t~ret0| 1) (<= 1 |g_#t~ret0|) (not (= 0 g_~x))) (not (<= |g_#in~x| 2147483647)))) [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L443 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 08:57:27,534 INFO L446 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-10-22 08:57:27,535 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:57:27,535 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:57:27,535 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:57:27,535 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-10-22 08:57:27,535 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-10-22 08:57:27,535 INFO L443 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-10-22 08:57:27,535 INFO L439 ceAbstractionStarter]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-10-22 08:57:27,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:57:27 BoogieIcfgContainer [2019-10-22 08:57:27,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:57:27,547 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:27,547 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:27,547 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:27,548 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:19" (3/4) ... [2019-10-22 08:57:27,552 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:57:27,558 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-10-22 08:57:27,561 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 08:57:27,562 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:57:27,604 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fa8a3bc1-df41-4c87-889b-7ad4068a30b8/bin/uautomizer/witness.graphml [2019-10-22 08:57:27,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:27,606 INFO L168 Benchmark]: Toolchain (without parser) took 8360.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,606 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:27,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -194.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,607 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,608 INFO L168 Benchmark]: Boogie Preprocessor took 15.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,608 INFO L168 Benchmark]: RCFGBuilder took 271.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,608 INFO L168 Benchmark]: TraceAbstraction took 7750.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 59.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,609 INFO L168 Benchmark]: Witness Printer took 56.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,611 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -194.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 271.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7750.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 59.8 MB. Max. memory is 11.5 GB. * Witness Printer took 56.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 4 error locations. Result: SAFE, OverallTime: 7.6s, OverallIterations: 20, TraceHistogramMax: 9, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 371 SDtfs, 640 SDslu, 1406 SDs, 0 SdLazy, 1497 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 690 GetRequests, 438 SyntacticMatches, 4 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 170 PreInvPairs, 182 NumberOfFragments, 67 HoareAnnotationTreeSize, 170 FomulaSimplifications, 254 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 907 NumberOfCodeBlocks, 866 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 876 ConstructedInterpolants, 0 QuantifiedInterpolants, 77162 SizeOfPredicates, 30 NumberOfNonLiveVariables, 656 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 934/1271 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...