./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/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 0.1.25-f470102 [2019-12-07 15:00:30,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:00:30,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:00:30,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:00:30,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:00:30,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:00:30,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:00:30,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:00:30,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:00:30,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:00:30,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:00:30,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:00:30,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:00:30,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:00:30,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:00:30,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:00:30,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:00:30,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:00:30,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:00:30,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:00:30,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:00:30,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:00:30,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:00:30,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:00:30,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:00:30,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:00:30,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:00:30,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:00:30,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:00:30,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:00:30,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:00:30,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:00:30,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:00:30,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:00:30,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:00:30,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:00:30,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:00:30,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:00:30,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:00:30,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:00:30,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:00:30,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-12-07 15:00:30,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:00:30,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:00:30,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:00:30,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:00:30,089 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 15:00:30,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:00:30,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 15:00:30,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:00:30,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:00:30,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:00:30,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:00:30,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:00:30,090 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 15:00:30,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:00:30,090 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:00:30,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:00:30,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:00:30,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:00:30,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:00:30,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:00:30,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:00:30,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:00:30,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:00:30,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:00:30,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 15:00:30,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:00:30,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:00:30,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:00:30,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/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 [2019-12-07 15:00:30,190 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:00:30,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:00:30,204 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:00:30,205 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:00:30,206 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:00:30,206 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-12-07 15:00:30,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/data/82269a68e/d80fa6a4d6274a0aab0a3422b935c9e5/FLAGa6e2a5e10 [2019-12-07 15:00:30,665 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:00:30,666 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-12-07 15:00:30,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/data/82269a68e/d80fa6a4d6274a0aab0a3422b935c9e5/FLAGa6e2a5e10 [2019-12-07 15:00:30,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/data/82269a68e/d80fa6a4d6274a0aab0a3422b935c9e5 [2019-12-07 15:00:30,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:00:30,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:00:30,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:00:30,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:00:30,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:00:30,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdb8c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30, skipping insertion in model container [2019-12-07 15:00:30,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:00:30,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:00:30,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:00:30,795 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:00:30,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:00:30,845 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:00:30,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30 WrapperNode [2019-12-07 15:00:30,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:00:30,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:00:30,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:00:30,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:00:30,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:00:30,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:00:30,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:00:30,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:00:30,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... [2019-12-07 15:00:30,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:00:30,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:00:30,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:00:30,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:00:30,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:00:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-12-07 15:00:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-12-07 15:00:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:00:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:00:31,024 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:00:31,024 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 15:00:31,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:00:31 BoogieIcfgContainer [2019-12-07 15:00:31,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:00:31,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:00:31,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:00:31,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:00:31,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:00:30" (1/3) ... [2019-12-07 15:00:31,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d2d199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:00:31, skipping insertion in model container [2019-12-07 15:00:31,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:00:30" (2/3) ... [2019-12-07 15:00:31,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d2d199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:00:31, skipping insertion in model container [2019-12-07 15:00:31,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:00:31" (3/3) ... [2019-12-07 15:00:31,030 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2019-12-07 15:00:31,037 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:00:31,041 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 15:00:31,049 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 15:00:31,063 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:00:31,063 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:00:31,063 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:00:31,063 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:00:31,063 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:00:31,064 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:00:31,064 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:00:31,064 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:00:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-12-07 15:00:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 15:00:31,078 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:31,079 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 15:00:31,079 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-12-07 15:00:31,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:31,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806410923] [2019-12-07 15:00:31,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:31,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806410923] [2019-12-07 15:00:31,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:31,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:00:31,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316818992] [2019-12-07 15:00:31,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:00:31,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:00:31,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:00:31,205 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-12-07 15:00:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:31,278 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-12-07 15:00:31,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:00:31,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 15:00:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:31,286 INFO L225 Difference]: With dead ends: 41 [2019-12-07 15:00:31,286 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 15:00:31,288 INFO L630 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 [2019-12-07 15:00:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 15:00:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-12-07 15:00:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 15:00:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-12-07 15:00:31,318 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-12-07 15:00:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:31,318 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-12-07 15:00:31,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:00:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-12-07 15:00:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 15:00:31,318 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:31,318 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:31,319 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:31,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-12-07 15:00:31,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:31,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023642194] [2019-12-07 15:00:31,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:31,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023642194] [2019-12-07 15:00:31,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:31,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:00:31,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221786762] [2019-12-07 15:00:31,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:00:31,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:00:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:00:31,342 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-12-07 15:00:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:31,381 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-12-07 15:00:31,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:00:31,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 15:00:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:31,383 INFO L225 Difference]: With dead ends: 50 [2019-12-07 15:00:31,383 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 15:00:31,383 INFO L630 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 [2019-12-07 15:00:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 15:00:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-12-07 15:00:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 15:00:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-12-07 15:00:31,391 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-12-07 15:00:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:31,391 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-12-07 15:00:31,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:00:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-12-07 15:00:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 15:00:31,392 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:31,392 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:31,392 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-12-07 15:00:31,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:31,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50951384] [2019-12-07 15:00:31,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:31,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50951384] [2019-12-07 15:00:31,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705873156] [2019-12-07 15:00:31,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 15:00:31,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:31,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:31,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 15:00:31,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365334043] [2019-12-07 15:00:31,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:00:31,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:00:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 15:00:31,470 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-12-07 15:00:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:31,536 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-12-07 15:00:31,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:00:31,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 15:00:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:31,538 INFO L225 Difference]: With dead ends: 63 [2019-12-07 15:00:31,538 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 15:00:31,538 INFO L630 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 [2019-12-07 15:00:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 15:00:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-12-07 15:00:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 15:00:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-12-07 15:00:31,547 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-12-07 15:00:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:31,548 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-12-07 15:00:31,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:00:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-12-07 15:00:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 15:00:31,548 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:31,548 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:31,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:31,750 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-12-07 15:00:31,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:31,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875876733] [2019-12-07 15:00:31,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:31,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875876733] [2019-12-07 15:00:31,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:31,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:00:31,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990137980] [2019-12-07 15:00:31,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:00:31,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:00:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:00:31,820 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 3 states. [2019-12-07 15:00:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:31,849 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-12-07 15:00:31,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:00:31,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-12-07 15:00:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:31,855 INFO L225 Difference]: With dead ends: 52 [2019-12-07 15:00:31,855 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 15:00:31,857 INFO L630 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 [2019-12-07 15:00:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 15:00:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-07 15:00:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 15:00:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-12-07 15:00:31,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-12-07 15:00:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:31,880 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-12-07 15:00:31,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:00:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-12-07 15:00:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 15:00:31,881 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:31,881 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:31,882 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-12-07 15:00:31,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:31,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978201100] [2019-12-07 15:00:31,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:31,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978201100] [2019-12-07 15:00:31,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:31,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:00:31,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190486571] [2019-12-07 15:00:31,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:00:31,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:00:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:00:31,915 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 4 states. [2019-12-07 15:00:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:31,929 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-12-07 15:00:31,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:00:31,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 15:00:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:31,930 INFO L225 Difference]: With dead ends: 77 [2019-12-07 15:00:31,930 INFO L226 Difference]: Without dead ends: 76 [2019-12-07 15:00:31,931 INFO L630 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 [2019-12-07 15:00:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-07 15:00:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-12-07 15:00:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-07 15:00:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2019-12-07 15:00:31,939 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 15 [2019-12-07 15:00:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:31,940 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2019-12-07 15:00:31,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:00:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2019-12-07 15:00:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 15:00:31,940 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:31,940 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-12-07 15:00:31,941 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-12-07 15:00:31,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:31,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36722009] [2019-12-07 15:00:31,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:31,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36722009] [2019-12-07 15:00:31,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702682806] [2019-12-07 15:00:31,984 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:32,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:00:32,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:32,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 15:00:32,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:32,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:32,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 15:00:32,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077473143] [2019-12-07 15:00:32,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 15:00:32,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:00:32,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:00:32,009 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 9 states. [2019-12-07 15:00:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:32,101 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-12-07 15:00:32,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 15:00:32,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-12-07 15:00:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:32,103 INFO L225 Difference]: With dead ends: 90 [2019-12-07 15:00:32,103 INFO L226 Difference]: Without dead ends: 89 [2019-12-07 15:00:32,103 INFO L630 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 [2019-12-07 15:00:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-07 15:00:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-12-07 15:00:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 15:00:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-12-07 15:00:32,113 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 17 [2019-12-07 15:00:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:32,113 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-12-07 15:00:32,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 15:00:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-12-07 15:00:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 15:00:32,114 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:32,114 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:32,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:32,315 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:32,316 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-12-07 15:00:32,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:32,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706793572] [2019-12-07 15:00:32,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:32,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706793572] [2019-12-07 15:00:32,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:32,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:00:32,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151065820] [2019-12-07 15:00:32,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:00:32,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:00:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 15:00:32,381 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 6 states. [2019-12-07 15:00:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:32,458 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-12-07 15:00:32,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:00:32,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-12-07 15:00:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:32,460 INFO L225 Difference]: With dead ends: 117 [2019-12-07 15:00:32,460 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 15:00:32,461 INFO L630 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 [2019-12-07 15:00:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 15:00:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-12-07 15:00:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-07 15:00:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-12-07 15:00:32,473 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-12-07 15:00:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:32,473 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-12-07 15:00:32,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:00:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-12-07 15:00:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 15:00:32,474 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:32,474 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:32,475 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:32,475 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-12-07 15:00:32,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:32,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615147265] [2019-12-07 15:00:32,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:32,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615147265] [2019-12-07 15:00:32,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:32,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:00:32,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726603410] [2019-12-07 15:00:32,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:00:32,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:00:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 15:00:32,502 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-12-07 15:00:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:32,582 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2019-12-07 15:00:32,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:00:32,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-12-07 15:00:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:32,584 INFO L225 Difference]: With dead ends: 135 [2019-12-07 15:00:32,584 INFO L226 Difference]: Without dead ends: 134 [2019-12-07 15:00:32,585 INFO L630 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 [2019-12-07 15:00:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-07 15:00:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2019-12-07 15:00:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-07 15:00:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2019-12-07 15:00:32,602 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 20 [2019-12-07 15:00:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:32,602 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2019-12-07 15:00:32,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:00:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2019-12-07 15:00:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 15:00:32,604 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:32,604 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-12-07 15:00:32,604 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:32,605 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-12-07 15:00:32,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:32,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042394926] [2019-12-07 15:00:32,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:32,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042394926] [2019-12-07 15:00:32,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037686377] [2019-12-07 15:00:32,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:32,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 15:00:32,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:32,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 15:00:32,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:32,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:32,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 15:00:32,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549180597] [2019-12-07 15:00:32,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 15:00:32,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 15:00:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:00:32,696 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand 11 states. [2019-12-07 15:00:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:32,816 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2019-12-07 15:00:32,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 15:00:32,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-12-07 15:00:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:32,818 INFO L225 Difference]: With dead ends: 150 [2019-12-07 15:00:32,818 INFO L226 Difference]: Without dead ends: 149 [2019-12-07 15:00:32,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-07 15:00:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-07 15:00:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-12-07 15:00:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-07 15:00:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2019-12-07 15:00:32,830 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 22 [2019-12-07 15:00:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:32,830 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2019-12-07 15:00:32,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 15:00:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2019-12-07 15:00:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 15:00:32,831 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:32,831 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:33,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:33,033 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-12-07 15:00:33,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:33,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660092758] [2019-12-07 15:00:33,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:33,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660092758] [2019-12-07 15:00:33,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020855484] [2019-12-07 15:00:33,108 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:33,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:00:33,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:33,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 15:00:33,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:33,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:33,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-12-07 15:00:33,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526730744] [2019-12-07 15:00:33,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 15:00:33,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 15:00:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:00:33,138 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand 8 states. [2019-12-07 15:00:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:33,258 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2019-12-07 15:00:33,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 15:00:33,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-12-07 15:00:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:33,260 INFO L225 Difference]: With dead ends: 174 [2019-12-07 15:00:33,260 INFO L226 Difference]: Without dead ends: 173 [2019-12-07 15:00:33,261 INFO L630 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 [2019-12-07 15:00:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-07 15:00:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2019-12-07 15:00:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-07 15:00:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2019-12-07 15:00:33,274 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 25 [2019-12-07 15:00:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:33,274 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2019-12-07 15:00:33,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 15:00:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2019-12-07 15:00:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 15:00:33,275 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:33,275 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-12-07 15:00:33,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:33,476 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-12-07 15:00:33,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:33,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506302961] [2019-12-07 15:00:33,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:00:33,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506302961] [2019-12-07 15:00:33,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702515227] [2019-12-07 15:00:33,548 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:33,564 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:00:33,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:33,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 15:00:33,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-12-07 15:00:33,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:33,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-12-07 15:00:33,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437053393] [2019-12-07 15:00:33,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 15:00:33,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:33,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 15:00:33,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-07 15:00:33,598 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 14 states. [2019-12-07 15:00:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:33,650 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2019-12-07 15:00:33,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 15:00:33,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-12-07 15:00:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:33,653 INFO L225 Difference]: With dead ends: 165 [2019-12-07 15:00:33,653 INFO L226 Difference]: Without dead ends: 164 [2019-12-07 15:00:33,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-07 15:00:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-07 15:00:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-12-07 15:00:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-07 15:00:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2019-12-07 15:00:33,666 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 27 [2019-12-07 15:00:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:33,666 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2019-12-07 15:00:33,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 15:00:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2019-12-07 15:00:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 15:00:33,668 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:33,668 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:33,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:33,869 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-12-07 15:00:33,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:33,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369011960] [2019-12-07 15:00:33,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:33,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369011960] [2019-12-07 15:00:33,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517718284] [2019-12-07 15:00:33,947 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:33,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 15:00:33,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:33,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 15:00:33,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:33,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:33,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 15:00:33,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525843703] [2019-12-07 15:00:33,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 15:00:33,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 15:00:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-12-07 15:00:33,977 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 10 states. [2019-12-07 15:00:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:34,137 INFO L93 Difference]: Finished difference Result 194 states and 248 transitions. [2019-12-07 15:00:34,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 15:00:34,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-12-07 15:00:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:34,138 INFO L225 Difference]: With dead ends: 194 [2019-12-07 15:00:34,138 INFO L226 Difference]: Without dead ends: 193 [2019-12-07 15:00:34,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-12-07 15:00:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-07 15:00:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2019-12-07 15:00:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-12-07 15:00:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2019-12-07 15:00:34,147 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 30 [2019-12-07 15:00:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:34,147 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2019-12-07 15:00:34,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 15:00:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2019-12-07 15:00:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 15:00:34,148 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:34,148 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:34,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:34,350 INFO L410 AbstractCegarLoop]: === Iteration 13 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1629013057, now seen corresponding path program 1 times [2019-12-07 15:00:34,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:34,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523120977] [2019-12-07 15:00:34,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:34,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523120977] [2019-12-07 15:00:34,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:34,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:00:34,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555379532] [2019-12-07 15:00:34,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:00:34,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:00:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:00:34,430 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand 5 states. [2019-12-07 15:00:34,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:34,447 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2019-12-07 15:00:34,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:00:34,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-12-07 15:00:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:34,449 INFO L225 Difference]: With dead ends: 179 [2019-12-07 15:00:34,449 INFO L226 Difference]: Without dead ends: 178 [2019-12-07 15:00:34,450 INFO L630 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 [2019-12-07 15:00:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-07 15:00:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-12-07 15:00:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-12-07 15:00:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 218 transitions. [2019-12-07 15:00:34,459 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 218 transitions. Word has length 31 [2019-12-07 15:00:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:34,460 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 218 transitions. [2019-12-07 15:00:34,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:00:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 218 transitions. [2019-12-07 15:00:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 15:00:34,461 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:34,461 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:34,462 INFO L410 AbstractCegarLoop]: === Iteration 14 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:34,462 INFO L82 PathProgramCache]: Analyzing trace with hash 857271516, now seen corresponding path program 4 times [2019-12-07 15:00:34,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:34,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784419949] [2019-12-07 15:00:34,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:00:34,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784419949] [2019-12-07 15:00:34,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614978569] [2019-12-07 15:00:34,518 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:34,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:00:34,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:34,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 15:00:34,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-12-07 15:00:34,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:00:34,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2019-12-07 15:00:34,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357551726] [2019-12-07 15:00:34,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:00:34,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:34,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:00:34,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-07 15:00:34,565 INFO L87 Difference]: Start difference. First operand 178 states and 218 transitions. Second operand 6 states. [2019-12-07 15:00:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:34,607 INFO L93 Difference]: Finished difference Result 239 states and 303 transitions. [2019-12-07 15:00:34,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 15:00:34,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-12-07 15:00:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:34,608 INFO L225 Difference]: With dead ends: 239 [2019-12-07 15:00:34,609 INFO L226 Difference]: Without dead ends: 111 [2019-12-07 15:00:34,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-12-07 15:00:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-07 15:00:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2019-12-07 15:00:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-07 15:00:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-12-07 15:00:34,616 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 35 [2019-12-07 15:00:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:34,616 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-12-07 15:00:34,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:00:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-12-07 15:00:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 15:00:34,617 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:34,617 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:34,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:34,818 INFO L410 AbstractCegarLoop]: === Iteration 15 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash -490250333, now seen corresponding path program 1 times [2019-12-07 15:00:34,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:34,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406371203] [2019-12-07 15:00:34,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:34,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406371203] [2019-12-07 15:00:34,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:34,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 15:00:34,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680146819] [2019-12-07 15:00:34,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:00:34,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:00:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 15:00:34,968 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 7 states. [2019-12-07 15:00:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:35,147 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-12-07 15:00:35,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 15:00:35,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-12-07 15:00:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:35,148 INFO L225 Difference]: With dead ends: 106 [2019-12-07 15:00:35,148 INFO L226 Difference]: Without dead ends: 105 [2019-12-07 15:00:35,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-12-07 15:00:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-07 15:00:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-12-07 15:00:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-07 15:00:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2019-12-07 15:00:35,153 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 35 [2019-12-07 15:00:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:35,154 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2019-12-07 15:00:35,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:00:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2019-12-07 15:00:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 15:00:35,154 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:35,154 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:35,155 INFO L410 AbstractCegarLoop]: === Iteration 16 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1982108899, now seen corresponding path program 1 times [2019-12-07 15:00:35,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:35,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364915542] [2019-12-07 15:00:35,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:35,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364915542] [2019-12-07 15:00:35,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:00:35,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 15:00:35,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107787888] [2019-12-07 15:00:35,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:00:35,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:00:35,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 15:00:35,192 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 7 states. [2019-12-07 15:00:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:35,273 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-12-07 15:00:35,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 15:00:35,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-12-07 15:00:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:35,275 INFO L225 Difference]: With dead ends: 124 [2019-12-07 15:00:35,275 INFO L226 Difference]: Without dead ends: 123 [2019-12-07 15:00:35,276 INFO L630 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 [2019-12-07 15:00:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-07 15:00:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-12-07 15:00:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-07 15:00:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2019-12-07 15:00:35,283 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 36 [2019-12-07 15:00:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:35,283 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2019-12-07 15:00:35,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:00:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2019-12-07 15:00:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 15:00:35,284 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:35,284 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:35,284 INFO L410 AbstractCegarLoop]: === Iteration 17 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:35,284 INFO L82 PathProgramCache]: Analyzing trace with hash -732976513, now seen corresponding path program 2 times [2019-12-07 15:00:35,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:35,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969706642] [2019-12-07 15:00:35,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:35,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969706642] [2019-12-07 15:00:35,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67934745] [2019-12-07 15:00:35,337 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:35,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:00:35,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:35,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 15:00:35,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:35,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:35,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 15:00:35,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511970566] [2019-12-07 15:00:35,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 15:00:35,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:00:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:00:35,367 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 9 states. [2019-12-07 15:00:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:35,488 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2019-12-07 15:00:35,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 15:00:35,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-12-07 15:00:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:35,490 INFO L225 Difference]: With dead ends: 140 [2019-12-07 15:00:35,490 INFO L226 Difference]: Without dead ends: 139 [2019-12-07 15:00:35,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-07 15:00:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-07 15:00:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-07 15:00:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-07 15:00:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2019-12-07 15:00:35,495 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 41 [2019-12-07 15:00:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:35,495 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2019-12-07 15:00:35,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 15:00:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2019-12-07 15:00:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-07 15:00:35,496 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:35,496 INFO L410 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:35,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:35,697 INFO L410 AbstractCegarLoop]: === Iteration 18 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2029893219, now seen corresponding path program 3 times [2019-12-07 15:00:35,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:35,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476484997] [2019-12-07 15:00:35,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:35,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476484997] [2019-12-07 15:00:35,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496106568] [2019-12-07 15:00:35,875 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/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 [2019-12-07 15:00:35,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 15:00:35,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:35,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 15:00:35,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:35,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:35,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 15:00:35,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814695532] [2019-12-07 15:00:35,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 15:00:35,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 15:00:35,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:00:35,904 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 11 states. [2019-12-07 15:00:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:36,092 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2019-12-07 15:00:36,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 15:00:36,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-12-07 15:00:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:36,094 INFO L225 Difference]: With dead ends: 158 [2019-12-07 15:00:36,094 INFO L226 Difference]: Without dead ends: 157 [2019-12-07 15:00:36,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2019-12-07 15:00:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-07 15:00:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-12-07 15:00:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-07 15:00:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-12-07 15:00:36,102 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 46 [2019-12-07 15:00:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:36,103 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-12-07 15:00:36,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 15:00:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-12-07 15:00:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 15:00:36,104 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:36,104 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:36,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:36,304 INFO L410 AbstractCegarLoop]: === Iteration 19 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -613451521, now seen corresponding path program 4 times [2019-12-07 15:00:36,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:36,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137909617] [2019-12-07 15:00:36,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:36,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137909617] [2019-12-07 15:00:36,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431683081] [2019-12-07 15:00:36,376 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/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 [2019-12-07 15:00:36,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:00:36,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:36,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 15:00:36,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:36,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:00:36,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-12-07 15:00:36,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460304634] [2019-12-07 15:00:36,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 15:00:36,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 15:00:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-12-07 15:00:36,409 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2019-12-07 15:00:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:36,654 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2019-12-07 15:00:36,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 15:00:36,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-12-07 15:00:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:36,656 INFO L225 Difference]: With dead ends: 176 [2019-12-07 15:00:36,656 INFO L226 Difference]: Without dead ends: 175 [2019-12-07 15:00:36,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 15:00:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-07 15:00:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-12-07 15:00:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-07 15:00:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2019-12-07 15:00:36,664 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 51 [2019-12-07 15:00:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:36,665 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2019-12-07 15:00:36,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 15:00:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2019-12-07 15:00:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-07 15:00:36,666 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:00:36,666 INFO L410 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 15:00:36,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:36,867 INFO L410 AbstractCegarLoop]: === Iteration 20 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:00:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:00:36,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1845164003, now seen corresponding path program 5 times [2019-12-07 15:00:36,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:00:36,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082150149] [2019-12-07 15:00:36,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:00:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:00:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 15:00:36,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082150149] [2019-12-07 15:00:36,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040044519] [2019-12-07 15:00:36,980 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/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 [2019-12-07 15:00:37,001 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 15:00:37,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:00:37,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 15:00:37,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:00:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-12-07 15:00:37,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:00:37,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2019-12-07 15:00:37,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321688050] [2019-12-07 15:00:37,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:00:37,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:00:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:00:37,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-12-07 15:00:37,041 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 7 states. [2019-12-07 15:00:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:00:37,080 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2019-12-07 15:00:37,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:00:37,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-12-07 15:00:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:00:37,081 INFO L225 Difference]: With dead ends: 215 [2019-12-07 15:00:37,081 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 15:00:37,081 INFO L630 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 [2019-12-07 15:00:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 15:00:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 15:00:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 15:00:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 15:00:37,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-12-07 15:00:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:00:37,082 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 15:00:37,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:00:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 15:00:37,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 15:00:37,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:00:37,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,455 INFO L242 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (not (= |g_#in~x| 0)) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,455 INFO L246 CegarLoopResult]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L242 CegarLoopResult]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= |g_#in~x| 0)) (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)))) [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L249 CegarLoopResult]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L242 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-12-07 15:00:37,456 INFO L242 CegarLoopResult]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-12-07 15:00:37,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:00:37 BoogieIcfgContainer [2019-12-07 15:00:37,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:00:37,467 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:00:37,467 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:00:37,467 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:00:37,467 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:00:31" (3/4) ... [2019-12-07 15:00:37,470 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 15:00:37,475 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-12-07 15:00:37,478 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 15:00:37,478 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 15:00:37,505 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ed53c910-c58e-431b-a038-0dcae6baf22e/bin/uautomizer/witness.graphml [2019-12-07 15:00:37,506 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:00:37,507 INFO L168 Benchmark]: Toolchain (without parser) took 6824.40 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 229.6 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -204.6 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2019-12-07 15:00:37,508 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:00:37,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 945.1 MB in the beginning and 1.2 GB in the end (delta: -246.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 15:00:37,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:00:37,508 INFO L168 Benchmark]: Boogie Preprocessor took 10.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:00:37,509 INFO L168 Benchmark]: RCFGBuilder took 149.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 15:00:37,509 INFO L168 Benchmark]: TraceAbstraction took 6440.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 33.0 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. [2019-12-07 15:00:37,510 INFO L168 Benchmark]: Witness Printer took 38.91 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2019-12-07 15:00:37,511 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 162.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 945.1 MB in the beginning and 1.2 GB in the end (delta: -246.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 149.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6440.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 33.0 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. * Witness Printer took 38.91 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 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: 6.2s, OverallIterations: 20, TraceHistogramMax: 9, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 371 SDtfs, 640 SDslu, 1406 SDs, 0 SdLazy, 1497 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 690 GetRequests, 438 SyntacticMatches, 4 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.4s 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: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 170 PreInvPairs, 182 NumberOfFragments, 67 HoareAnnotationTreeSize, 170 FomulaSimplifications, 260 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s 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...