./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 457415f9b28998cf0ba7f80d69eaf14873f5a98f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:55:13,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:55:13,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:55:13,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:55:13,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:55:13,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:55:13,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:55:13,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:55:13,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:55:13,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:55:13,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:55:13,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:55:13,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:55:13,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:55:13,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:55:13,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:55:13,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:55:13,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:55:13,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:55:13,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:55:13,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:55:13,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:55:13,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:55:13,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:55:13,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:55:13,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:55:13,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:55:13,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:55:13,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:55:13,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:55:13,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:55:13,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:55:13,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:55:13,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:55:13,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:55:13,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:55:13,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:55:13,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:55:13,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:55:13,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:55:13,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:55:13,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-25 08:55:13,252 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:55:13,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:55:13,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:55:13,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:55:13,253 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:55:13,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:55:13,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:55:13,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:55:13,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:55:13,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:55:13,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:55:13,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:55:13,255 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-25 08:55:13,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:55:13,255 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:55:13,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:55:13,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:55:13,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:55:13,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:55:13,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:55:13,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:55:13,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:55:13,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:55:13,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:55:13,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:55:13,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:55:13,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:55:13,258 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_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 -> 457415f9b28998cf0ba7f80d69eaf14873f5a98f [2019-11-25 08:55:13,434 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:55:13,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:55:13,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:55:13,456 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:55:13,456 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:55:13,457 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2019-11-25 08:55:13,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/data/60e9cc061/6299df0ed5b242e2b0f21541aa6fbfa9/FLAGafbd670e2 [2019-11-25 08:55:13,875 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:55:13,876 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2019-11-25 08:55:13,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/data/60e9cc061/6299df0ed5b242e2b0f21541aa6fbfa9/FLAGafbd670e2 [2019-11-25 08:55:13,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/data/60e9cc061/6299df0ed5b242e2b0f21541aa6fbfa9 [2019-11-25 08:55:13,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:55:13,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:55:13,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:55:13,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:55:13,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:55:13,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:55:13" (1/1) ... [2019-11-25 08:55:13,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a2a056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:13, skipping insertion in model container [2019-11-25 08:55:13,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:55:13" (1/1) ... [2019-11-25 08:55:13,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:55:13,927 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:55:14,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:55:14,118 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:55:14,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:55:14,201 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:55:14,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14 WrapperNode [2019-11-25 08:55:14,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:55:14,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:55:14,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:55:14,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:55:14,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:55:14,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:55:14,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:55:14,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:55:14,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... [2019-11-25 08:55:14,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:55:14,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:55:14,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:55:14,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:55:14,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:55:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-11-25 08:55:14,308 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-11-25 08:55:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:55:14,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:55:14,510 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:55:14,511 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:55:14,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:55:14 BoogieIcfgContainer [2019-11-25 08:55:14,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:55:14,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:55:14,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:55:14,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:55:14,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:55:13" (1/3) ... [2019-11-25 08:55:14,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbb20ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:55:14, skipping insertion in model container [2019-11-25 08:55:14,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:55:14" (2/3) ... [2019-11-25 08:55:14,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbb20ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:55:14, skipping insertion in model container [2019-11-25 08:55:14,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:55:14" (3/3) ... [2019-11-25 08:55:14,528 INFO L109 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2019-11-25 08:55:14,536 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:55:14,542 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-25 08:55:14,552 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-25 08:55:14,585 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:55:14,585 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:55:14,585 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:55:14,585 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:55:14,585 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:55:14,586 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:55:14,586 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:55:14,586 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:55:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-25 08:55:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-25 08:55:14,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:14,607 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:14,607 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861353, now seen corresponding path program 1 times [2019-11-25 08:55:14,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:14,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565624401] [2019-11-25 08:55:14,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:14,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565624401] [2019-11-25 08:55:14,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:14,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:55:14,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402834314] [2019-11-25 08:55:14,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:14,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:14,799 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2019-11-25 08:55:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:14,919 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-11-25 08:55:14,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:55:14,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-25 08:55:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:14,929 INFO L225 Difference]: With dead ends: 44 [2019-11-25 08:55:14,929 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:55:14,932 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 [2019-11-25 08:55:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:55:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-11-25 08:55:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-25 08:55:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-25 08:55:14,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2019-11-25 08:55:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:14,962 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-25 08:55:14,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-25 08:55:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-25 08:55:14,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:14,963 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:14,963 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861577, now seen corresponding path program 1 times [2019-11-25 08:55:14,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:14,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626253835] [2019-11-25 08:55:14,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:15,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626253835] [2019-11-25 08:55:15,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:15,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:55:15,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997263918] [2019-11-25 08:55:15,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:15,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:15,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:15,010 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-11-25 08:55:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:15,087 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-25 08:55:15,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:55:15,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-25 08:55:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:15,089 INFO L225 Difference]: With dead ends: 34 [2019-11-25 08:55:15,089 INFO L226 Difference]: Without dead ends: 33 [2019-11-25 08:55:15,090 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 [2019-11-25 08:55:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-25 08:55:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2019-11-25 08:55:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:55:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-25 08:55:15,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2019-11-25 08:55:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:15,099 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-25 08:55:15,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-25 08:55:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:55:15,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:15,101 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:15,101 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:15,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1926938272, now seen corresponding path program 1 times [2019-11-25 08:55:15,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:15,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251659580] [2019-11-25 08:55:15,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:15,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251659580] [2019-11-25 08:55:15,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:15,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:55:15,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383353522] [2019-11-25 08:55:15,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:15,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:15,165 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-11-25 08:55:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:15,217 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-25 08:55:15,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:55:15,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-25 08:55:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:15,218 INFO L225 Difference]: With dead ends: 33 [2019-11-25 08:55:15,219 INFO L226 Difference]: Without dead ends: 32 [2019-11-25 08:55:15,219 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 [2019-11-25 08:55:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-25 08:55:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-25 08:55:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:55:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-25 08:55:15,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2019-11-25 08:55:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:15,226 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-25 08:55:15,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-25 08:55:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:55:15,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:15,227 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:15,227 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:15,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1926931321, now seen corresponding path program 1 times [2019-11-25 08:55:15,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:15,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785127351] [2019-11-25 08:55:15,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:15,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785127351] [2019-11-25 08:55:15,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:15,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:55:15,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800024341] [2019-11-25 08:55:15,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:15,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:15,295 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-25 08:55:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:15,347 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-25 08:55:15,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:55:15,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-25 08:55:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:15,349 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:55:15,349 INFO L226 Difference]: Without dead ends: 31 [2019-11-25 08:55:15,349 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 [2019-11-25 08:55:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-25 08:55:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-25 08:55:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-25 08:55:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-25 08:55:15,355 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2019-11-25 08:55:15,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:15,355 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-25 08:55:15,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-25 08:55:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:55:15,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:15,356 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:15,357 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1954337320, now seen corresponding path program 1 times [2019-11-25 08:55:15,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:15,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703911658] [2019-11-25 08:55:15,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:15,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703911658] [2019-11-25 08:55:15,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:15,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:55:15,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39202850] [2019-11-25 08:55:15,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:15,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:15,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:15,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:15,408 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-11-25 08:55:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:15,506 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-25 08:55:15,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:55:15,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-25 08:55:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:15,507 INFO L225 Difference]: With dead ends: 43 [2019-11-25 08:55:15,507 INFO L226 Difference]: Without dead ends: 42 [2019-11-25 08:55:15,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:55:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-25 08:55:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-11-25 08:55:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:55:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-25 08:55:15,515 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 13 [2019-11-25 08:55:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:15,515 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-25 08:55:15,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-25 08:55:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:55:15,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:15,516 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:15,516 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash -906050173, now seen corresponding path program 1 times [2019-11-25 08:55:15,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:15,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598486841] [2019-11-25 08:55:15,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:15,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598486841] [2019-11-25 08:55:15,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29672421] [2019-11-25 08:55:15,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:15,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:55:15,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:15,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:55:15,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2019-11-25 08:55:15,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612586118] [2019-11-25 08:55:15,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:15,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:55:15,652 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2019-11-25 08:55:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:15,736 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-11-25 08:55:15,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:55:15,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-25 08:55:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:15,740 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:55:15,740 INFO L226 Difference]: Without dead ends: 37 [2019-11-25 08:55:15,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:55:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-25 08:55:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-11-25 08:55:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:55:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-25 08:55:15,746 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2019-11-25 08:55:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:15,746 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-25 08:55:15,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-25 08:55:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:55:15,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:15,747 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:15,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:15,949 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash -906049949, now seen corresponding path program 1 times [2019-11-25 08:55:15,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:15,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587207148] [2019-11-25 08:55:15,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:16,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587207148] [2019-11-25 08:55:16,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497678253] [2019-11-25 08:55:16,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:16,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:55:16,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:16,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:16,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-25 08:55:16,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559129211] [2019-11-25 08:55:16,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:55:16,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:55:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:55:16,048 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-25 08:55:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:16,228 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-11-25 08:55:16,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:55:16,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-25 08:55:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:16,231 INFO L225 Difference]: With dead ends: 65 [2019-11-25 08:55:16,231 INFO L226 Difference]: Without dead ends: 64 [2019-11-25 08:55:16,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:55:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-25 08:55:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2019-11-25 08:55:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-25 08:55:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-11-25 08:55:16,239 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 13 [2019-11-25 08:55:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:16,239 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-11-25 08:55:16,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:55:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-11-25 08:55:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:55:16,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:16,240 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:16,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:16,441 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 454907873, now seen corresponding path program 1 times [2019-11-25 08:55:16,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:16,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288753892] [2019-11-25 08:55:16,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:16,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288753892] [2019-11-25 08:55:16,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958119424] [2019-11-25 08:55:16,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:16,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:55:16,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:16,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:16,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2019-11-25 08:55:16,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417565634] [2019-11-25 08:55:16,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:55:16,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:55:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:55:16,581 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 10 states. [2019-11-25 08:55:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:16,765 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-25 08:55:16,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:55:16,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-25 08:55:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:16,767 INFO L225 Difference]: With dead ends: 64 [2019-11-25 08:55:16,767 INFO L226 Difference]: Without dead ends: 39 [2019-11-25 08:55:16,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:55:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-25 08:55:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-11-25 08:55:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:55:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-25 08:55:16,774 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 14 [2019-11-25 08:55:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:16,775 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-25 08:55:16,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:55:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-25 08:55:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:55:16,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:16,776 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:16,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:16,987 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash 454914824, now seen corresponding path program 1 times [2019-11-25 08:55:16,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:16,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69330998] [2019-11-25 08:55:16,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:17,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69330998] [2019-11-25 08:55:17,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628855941] [2019-11-25 08:55:17,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:17,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:55:17,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:17,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:55:17,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2019-11-25 08:55:17,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188570739] [2019-11-25 08:55:17,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:17,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:55:17,134 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2019-11-25 08:55:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:17,203 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-25 08:55:17,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:55:17,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-25 08:55:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:17,205 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:55:17,205 INFO L226 Difference]: Without dead ends: 37 [2019-11-25 08:55:17,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:55:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-25 08:55:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-25 08:55:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-25 08:55:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-11-25 08:55:17,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2019-11-25 08:55:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:17,212 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-11-25 08:55:17,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-11-25 08:55:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:55:17,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:17,217 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:17,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:17,420 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1977222701, now seen corresponding path program 1 times [2019-11-25 08:55:17,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:17,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923083641] [2019-11-25 08:55:17,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:17,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923083641] [2019-11-25 08:55:17,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865373271] [2019-11-25 08:55:17,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:17,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:55:17,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:17,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:17,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-25 08:55:17,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401210671] [2019-11-25 08:55:17,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:55:17,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:17,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:55:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:55:17,515 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2019-11-25 08:55:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:17,592 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-11-25 08:55:17,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:55:17,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-25 08:55:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:17,601 INFO L225 Difference]: With dead ends: 45 [2019-11-25 08:55:17,601 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:55:17,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:55:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:55:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-25 08:55:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:55:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-25 08:55:17,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 14 [2019-11-25 08:55:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:17,620 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-25 08:55:17,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:55:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-25 08:55:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:55:17,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:17,621 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2019-11-25 08:55:17,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:17,824 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1341115267, now seen corresponding path program 2 times [2019-11-25 08:55:17,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:17,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125034412] [2019-11-25 08:55:17,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:17,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125034412] [2019-11-25 08:55:17,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471115882] [2019-11-25 08:55:17,906 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:17,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:55:17,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:17,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:55:17,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:17,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:17,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-25 08:55:17,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693611111] [2019-11-25 08:55:17,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:55:17,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:55:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:55:17,981 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2019-11-25 08:55:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:18,334 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2019-11-25 08:55:18,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-25 08:55:18,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-25 08:55:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:18,336 INFO L225 Difference]: With dead ends: 78 [2019-11-25 08:55:18,336 INFO L226 Difference]: Without dead ends: 77 [2019-11-25 08:55:18,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2019-11-25 08:55:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-25 08:55:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 24. [2019-11-25 08:55:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:55:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-25 08:55:18,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2019-11-25 08:55:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:18,342 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-25 08:55:18,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:55:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-25 08:55:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:55:18,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:18,343 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:18,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:18,545 INFO L410 AbstractCegarLoop]: === Iteration 12 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash 451770350, now seen corresponding path program 1 times [2019-11-25 08:55:18,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:18,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456557784] [2019-11-25 08:55:18,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:18,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456557784] [2019-11-25 08:55:18,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643524282] [2019-11-25 08:55:18,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:18,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:55:18,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:18,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:18,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-25 08:55:18,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361844267] [2019-11-25 08:55:18,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:55:18,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:18,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:55:18,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:55:18,663 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2019-11-25 08:55:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:18,754 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-11-25 08:55:18,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:55:18,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-25 08:55:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:18,758 INFO L225 Difference]: With dead ends: 37 [2019-11-25 08:55:18,758 INFO L226 Difference]: Without dead ends: 36 [2019-11-25 08:55:18,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:55:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-25 08:55:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-11-25 08:55:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-25 08:55:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-25 08:55:18,762 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2019-11-25 08:55:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:18,762 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-25 08:55:18,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:55:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-25 08:55:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:55:18,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:18,763 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-11-25 08:55:18,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:18,967 INFO L410 AbstractCegarLoop]: === Iteration 13 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1375099731, now seen corresponding path program 2 times [2019-11-25 08:55:18,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:18,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125415358] [2019-11-25 08:55:18,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:19,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125415358] [2019-11-25 08:55:19,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342539736] [2019-11-25 08:55:19,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:19,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:55:19,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:19,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:55:19,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:19,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:19,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-25 08:55:19,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851224435] [2019-11-25 08:55:19,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:55:19,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:19,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:55:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:55:19,088 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-11-25 08:55:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:19,188 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-11-25 08:55:19,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:55:19,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-25 08:55:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:19,189 INFO L225 Difference]: With dead ends: 43 [2019-11-25 08:55:19,190 INFO L226 Difference]: Without dead ends: 42 [2019-11-25 08:55:19,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:55:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-25 08:55:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2019-11-25 08:55:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-25 08:55:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-25 08:55:19,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 20 [2019-11-25 08:55:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:19,196 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-25 08:55:19,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:55:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-25 08:55:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-25 08:55:19,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:19,197 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:19,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:19,410 INFO L410 AbstractCegarLoop]: === Iteration 14 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash 511948884, now seen corresponding path program 2 times [2019-11-25 08:55:19,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:19,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317519942] [2019-11-25 08:55:19,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:19,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317519942] [2019-11-25 08:55:19,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941164450] [2019-11-25 08:55:19,492 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:19,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:55:19,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:19,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:55:19,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:19,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:19,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-25 08:55:19,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843834834] [2019-11-25 08:55:19,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:55:19,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:19,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:55:19,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:55:19,522 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2019-11-25 08:55:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:19,699 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2019-11-25 08:55:19,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:55:19,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-11-25 08:55:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:19,701 INFO L225 Difference]: With dead ends: 50 [2019-11-25 08:55:19,701 INFO L226 Difference]: Without dead ends: 49 [2019-11-25 08:55:19,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:55:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-25 08:55:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2019-11-25 08:55:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-25 08:55:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-25 08:55:19,707 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2019-11-25 08:55:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:19,707 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-25 08:55:19,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:55:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-25 08:55:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-25 08:55:19,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:19,709 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:19,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:19,909 INFO L410 AbstractCegarLoop]: === Iteration 15 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1009095738, now seen corresponding path program 3 times [2019-11-25 08:55:19,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:19,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491410127] [2019-11-25 08:55:19,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:20,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491410127] [2019-11-25 08:55:20,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278555189] [2019-11-25 08:55:20,020 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:20,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-25 08:55:20,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:20,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:55:20,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:20,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:20,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-25 08:55:20,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430983876] [2019-11-25 08:55:20,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:55:20,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:20,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:55:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:55:20,077 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2019-11-25 08:55:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:20,271 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-11-25 08:55:20,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:55:20,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-11-25 08:55:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:20,273 INFO L225 Difference]: With dead ends: 61 [2019-11-25 08:55:20,273 INFO L226 Difference]: Without dead ends: 60 [2019-11-25 08:55:20,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2019-11-25 08:55:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-25 08:55:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-11-25 08:55:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-25 08:55:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-25 08:55:20,280 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2019-11-25 08:55:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:20,280 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-25 08:55:20,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:55:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-25 08:55:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-25 08:55:20,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:20,289 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-11-25 08:55:20,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:20,490 INFO L410 AbstractCegarLoop]: === Iteration 16 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:20,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1872988191, now seen corresponding path program 3 times [2019-11-25 08:55:20,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:20,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871385011] [2019-11-25 08:55:20,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:20,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871385011] [2019-11-25 08:55:20,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908212694] [2019-11-25 08:55:20,610 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/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 [2019-11-25 08:55:20,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-25 08:55:20,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:20,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:55:20,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:20,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:20,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-25 08:55:20,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27048073] [2019-11-25 08:55:20,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:55:20,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:55:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:55:20,646 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2019-11-25 08:55:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:20,784 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-11-25 08:55:20,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:55:20,784 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-11-25 08:55:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:20,785 INFO L225 Difference]: With dead ends: 67 [2019-11-25 08:55:20,785 INFO L226 Difference]: Without dead ends: 66 [2019-11-25 08:55:20,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:55:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-25 08:55:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2019-11-25 08:55:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:55:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-25 08:55:20,802 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2019-11-25 08:55:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:20,803 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-25 08:55:20,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:55:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-25 08:55:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-25 08:55:20,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:20,806 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:21,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:21,009 INFO L410 AbstractCegarLoop]: === Iteration 17 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:21,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1485859744, now seen corresponding path program 4 times [2019-11-25 08:55:21,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:21,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346772305] [2019-11-25 08:55:21,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:21,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346772305] [2019-11-25 08:55:21,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557135783] [2019-11-25 08:55:21,118 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:21,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:55:21,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:21,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:55:21,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-25 08:55:21,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:21,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 15 [2019-11-25 08:55:21,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143369537] [2019-11-25 08:55:21,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:55:21,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:21,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:55:21,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:55:21,211 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2019-11-25 08:55:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:21,524 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-11-25 08:55:21,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:55:21,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2019-11-25 08:55:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:21,525 INFO L225 Difference]: With dead ends: 73 [2019-11-25 08:55:21,525 INFO L226 Difference]: Without dead ends: 72 [2019-11-25 08:55:21,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2019-11-25 08:55:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-25 08:55:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2019-11-25 08:55:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-25 08:55:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-25 08:55:21,532 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 38 [2019-11-25 08:55:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:21,532 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-25 08:55:21,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:55:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-25 08:55:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-25 08:55:21,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:21,534 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:21,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:21,736 INFO L410 AbstractCegarLoop]: === Iteration 18 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1828298374, now seen corresponding path program 5 times [2019-11-25 08:55:21,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:21,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129545116] [2019-11-25 08:55:21,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:21,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129545116] [2019-11-25 08:55:21,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197850330] [2019-11-25 08:55:21,914 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:21,948 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-25 08:55:21,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:21,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:55:21,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:21,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:21,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-11-25 08:55:21,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805159128] [2019-11-25 08:55:21,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:55:21,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:55:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:55:21,962 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2019-11-25 08:55:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:22,316 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-11-25 08:55:22,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-25 08:55:22,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-11-25 08:55:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:22,318 INFO L225 Difference]: With dead ends: 92 [2019-11-25 08:55:22,318 INFO L226 Difference]: Without dead ends: 91 [2019-11-25 08:55:22,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2019-11-25 08:55:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-25 08:55:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2019-11-25 08:55:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-25 08:55:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-11-25 08:55:22,332 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 44 [2019-11-25 08:55:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:22,334 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-11-25 08:55:22,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:55:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-11-25 08:55:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-25 08:55:22,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:22,339 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2019-11-25 08:55:22,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:22,542 INFO L410 AbstractCegarLoop]: === Iteration 19 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 123200235, now seen corresponding path program 4 times [2019-11-25 08:55:22,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:22,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367374162] [2019-11-25 08:55:22,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:22,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367374162] [2019-11-25 08:55:22,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116113416] [2019-11-25 08:55:22,668 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:22,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:55:22,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:22,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-25 08:55:22,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:55:22,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:22,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2019-11-25 08:55:22,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105986071] [2019-11-25 08:55:22,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-25 08:55:22,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:55:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:55:22,802 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2019-11-25 08:55:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:22,980 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2019-11-25 08:55:22,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:55:22,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-11-25 08:55:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:22,982 INFO L225 Difference]: With dead ends: 96 [2019-11-25 08:55:22,982 INFO L226 Difference]: Without dead ends: 57 [2019-11-25 08:55:22,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:55:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-25 08:55:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-25 08:55:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-25 08:55:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-25 08:55:22,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 44 [2019-11-25 08:55:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:22,991 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-25 08:55:22,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-25 08:55:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-25 08:55:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-25 08:55:22,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:22,992 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:23,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:23,201 INFO L410 AbstractCegarLoop]: === Iteration 20 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash -319514926, now seen corresponding path program 6 times [2019-11-25 08:55:23,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:23,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497883328] [2019-11-25 08:55:23,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:23,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497883328] [2019-11-25 08:55:23,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556810798] [2019-11-25 08:55:23,406 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:23,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-25 08:55:23,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:23,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:55:23,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:23,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:23,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-11-25 08:55:23,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899337880] [2019-11-25 08:55:23,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-25 08:55:23,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:23,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-25 08:55:23,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:55:23,460 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2019-11-25 08:55:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:23,844 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-11-25 08:55:23,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:55:23,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2019-11-25 08:55:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:23,845 INFO L225 Difference]: With dead ends: 71 [2019-11-25 08:55:23,845 INFO L226 Difference]: Without dead ends: 70 [2019-11-25 08:55:23,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2019-11-25 08:55:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-25 08:55:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-11-25 08:55:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-25 08:55:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-11-25 08:55:23,854 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 56 [2019-11-25 08:55:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:23,855 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-11-25 08:55:23,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-25 08:55:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-11-25 08:55:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-25 08:55:23,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:23,856 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:24,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:24,067 INFO L410 AbstractCegarLoop]: === Iteration 21 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash 52526366, now seen corresponding path program 7 times [2019-11-25 08:55:24,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:24,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646933179] [2019-11-25 08:55:24,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:24,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646933179] [2019-11-25 08:55:24,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068022853] [2019-11-25 08:55:24,351 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:24,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-25 08:55:24,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:24,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:24,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2019-11-25 08:55:24,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884824747] [2019-11-25 08:55:24,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-25 08:55:24,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:24,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-25 08:55:24,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:55:24,422 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 25 states. [2019-11-25 08:55:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:24,814 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-11-25 08:55:24,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-25 08:55:24,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2019-11-25 08:55:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:24,817 INFO L225 Difference]: With dead ends: 83 [2019-11-25 08:55:24,817 INFO L226 Difference]: Without dead ends: 82 [2019-11-25 08:55:24,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2019-11-25 08:55:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-25 08:55:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-25 08:55:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:55:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-11-25 08:55:24,827 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 68 [2019-11-25 08:55:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:24,828 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-11-25 08:55:24,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-25 08:55:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-11-25 08:55:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-25 08:55:24,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:24,829 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:25,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:25,030 INFO L410 AbstractCegarLoop]: === Iteration 22 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1106554518, now seen corresponding path program 8 times [2019-11-25 08:55:25,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:25,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183179595] [2019-11-25 08:55:25,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:25,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183179595] [2019-11-25 08:55:25,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771031353] [2019-11-25 08:55:25,353 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:25,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:55:25,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:25,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-25 08:55:25,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:25,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:25,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2019-11-25 08:55:25,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49418374] [2019-11-25 08:55:25,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-25 08:55:25,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:25,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-25 08:55:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2019-11-25 08:55:25,413 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 29 states. [2019-11-25 08:55:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:25,936 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-11-25 08:55:25,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-25 08:55:25,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2019-11-25 08:55:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:25,938 INFO L225 Difference]: With dead ends: 95 [2019-11-25 08:55:25,939 INFO L226 Difference]: Without dead ends: 94 [2019-11-25 08:55:25,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=2230, Unknown=0, NotChecked=0, Total=2862 [2019-11-25 08:55:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-25 08:55:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-11-25 08:55:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-25 08:55:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-11-25 08:55:25,948 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 80 [2019-11-25 08:55:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:25,948 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-11-25 08:55:25,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-25 08:55:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-11-25 08:55:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-25 08:55:25,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:25,949 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:26,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:26,152 INFO L410 AbstractCegarLoop]: === Iteration 23 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1279454282, now seen corresponding path program 9 times [2019-11-25 08:55:26,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:26,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606474125] [2019-11-25 08:55:26,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:26,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606474125] [2019-11-25 08:55:26,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434347323] [2019-11-25 08:55:26,583 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:26,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-25 08:55:26,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:26,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-25 08:55:26,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:55:26,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:26,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 35 [2019-11-25 08:55:26,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256316767] [2019-11-25 08:55:26,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-25 08:55:26,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-25 08:55:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2019-11-25 08:55:26,719 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 36 states. [2019-11-25 08:55:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:27,544 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2019-11-25 08:55:27,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-25 08:55:27,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 92 [2019-11-25 08:55:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:27,545 INFO L225 Difference]: With dead ends: 119 [2019-11-25 08:55:27,545 INFO L226 Difference]: Without dead ends: 118 [2019-11-25 08:55:27,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1140, Invalid=3830, Unknown=0, NotChecked=0, Total=4970 [2019-11-25 08:55:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-25 08:55:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-11-25 08:55:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-25 08:55:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-11-25 08:55:27,559 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 92 [2019-11-25 08:55:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:27,559 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-11-25 08:55:27,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-25 08:55:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-11-25 08:55:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-25 08:55:27,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:27,561 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:27,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:27,764 INFO L410 AbstractCegarLoop]: === Iteration 24 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:55:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash -853253554, now seen corresponding path program 10 times [2019-11-25 08:55:27,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:27,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020433811] [2019-11-25 08:55:27,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:55:28,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020433811] [2019-11-25 08:55:28,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181655784] [2019-11-25 08:55:28,421 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:28,466 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:55:28,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:28,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-25 08:55:28,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 10 proven. 682 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-11-25 08:55:28,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:28,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 51 [2019-11-25 08:55:28,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575080699] [2019-11-25 08:55:28,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-25 08:55:28,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-25 08:55:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2221, Unknown=0, NotChecked=0, Total=2652 [2019-11-25 08:55:28,895 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 52 states. [2019-11-25 08:55:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:29,219 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-11-25 08:55:29,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:55:29,219 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 116 [2019-11-25 08:55:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:29,220 INFO L225 Difference]: With dead ends: 117 [2019-11-25 08:55:29,220 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:55:29,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2019-11-25 08:55:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:55:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:55:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:55:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:55:29,226 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2019-11-25 08:55:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:29,227 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:55:29,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-25 08:55:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:55:29,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:55:29,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:29,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:55:30,092 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2019-11-25 08:55:30,329 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-11-25 08:55:30,511 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2019-11-25 08:55:30,626 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2019-11-25 08:55:30,739 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-11-25 08:55:30,856 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2019-11-25 08:55:30,974 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2019-11-25 08:55:31,149 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 110 [2019-11-25 08:55:31,364 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-11-25 08:55:31,496 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2019-11-25 08:55:31,654 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2019-11-25 08:55:31,761 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2019-11-25 08:55:31,998 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2019-11-25 08:55:32,130 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-11-25 08:55:32,268 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 113 [2019-11-25 08:55:33,498 WARN L192 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 33 [2019-11-25 08:55:33,977 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 1 [2019-11-25 08:55:36,733 WARN L192 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 520 DAG size of output: 42 [2019-11-25 08:55:36,735 INFO L444 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-11-25 08:55:36,735 INFO L444 ceAbstractionStarter]: For program point fFINAL(lines 13 23) no Hoare annotation was computed. [2019-11-25 08:55:36,735 INFO L444 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-11-25 08:55:36,735 INFO L444 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-11-25 08:55:36,736 INFO L440 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (not (<= 0 |f_#in~x|))) (.cse1 (not (<= |f_#in~x| 2147483647)))) (and (or (not (<= 0 |f_#in~y|)) (not (<= |f_#in~y| 2147483647)) (and (not (= 0 f_~y)) (<= 0 f_~x) (<= f_~x 2147483647) (not (= 0 f_~x)) (<= f_~y 2147483647) (<= 0 f_~y)) .cse0 .cse1) (or (not (<= |f_#in~y| |f_#in~x|)) (= |f_#in~x| 0) (and (<= f_~y f_~x) (<= f_~x (+ f_~y 1))) .cse0 (not (<= |f_#in~x| (+ |f_#in~y| 1))) .cse1))) [2019-11-25 08:55:36,736 INFO L444 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L440 ceAbstractionStarter]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (not (<= 0 |f_#in~y|))) (.cse1 (not (<= |f_#in~y| 2147483647))) (.cse2 (not (<= |f_#in~x| 2147483647)))) (and (or .cse0 .cse1 (not (<= 1 |f_#in~x|)) .cse2) (or (and (not (= 0 f_~y)) (<= 0 f_~x) (<= f_~x (+ f_~y 1)) (<= f_~x 2147483646) (<= f_~y 2147483647) (<= 0 f_~y)) .cse0 .cse1 (not (<= 0 |f_#in~x|)) .cse2))) [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point L18-3(line 18) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point L14(lines 14 22) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L444 ceAbstractionStarter]: For program point fEXIT(lines 13 23) no Hoare annotation was computed. [2019-11-25 08:55:36,737 INFO L447 ceAbstractionStarter]: At program point fENTRY(lines 13 23) the Hoare annotation is: true [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L440 ceAbstractionStarter]: At program point L31(lines 25 32) the Hoare annotation is: (<= ULTIMATE.start_main_~y~0 2147483647) [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L440 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= ULTIMATE.start_main_~y~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~y~0)) [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point L28(lines 28 30) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-11-25 08:55:36,738 INFO L444 ceAbstractionStarter]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2019-11-25 08:55:36,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:55:36 BoogieIcfgContainer [2019-11-25 08:55:36,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:55:36,748 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:55:36,748 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:55:36,748 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:55:36,749 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:55:14" (3/4) ... [2019-11-25 08:55:36,752 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:55:36,757 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2019-11-25 08:55:36,761 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:55:36,761 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-25 08:55:36,801 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a0cb4b4e-10b5-491a-ac7f-680af2f4f4f1/bin/uautomizer/witness.graphml [2019-11-25 08:55:36,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:55:36,803 INFO L168 Benchmark]: Toolchain (without parser) took 22909.49 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 306.7 MB). Free memory was 951.4 MB in the beginning and 905.1 MB in the end (delta: 46.3 MB). Peak memory consumption was 353.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:36,803 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:55:36,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -187.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:36,804 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:55:36,805 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:36,805 INFO L168 Benchmark]: RCFGBuilder took 253.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:36,806 INFO L168 Benchmark]: TraceAbstraction took 22235.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 165.7 MB). Free memory was 1.1 GB in the beginning and 908.2 MB in the end (delta: 210.6 MB). Peak memory consumption was 433.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:36,806 INFO L168 Benchmark]: Witness Printer took 53.77 ms. Allocated memory is still 1.3 GB. Free memory was 908.2 MB in the beginning and 905.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:36,809 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 307.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -187.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 253.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 22235.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 165.7 MB). Free memory was 1.1 GB in the beginning and 908.2 MB in the end (delta: 210.6 MB). Peak memory consumption was 433.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.77 ms. Allocated memory is still 1.3 GB. Free memory was 908.2 MB in the beginning and 905.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: 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: 25]: Loop Invariant Derived loop invariant: y <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 4 error locations. Result: SAFE, OverallTime: 22.1s, OverallIterations: 24, TraceHistogramMax: 19, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.3s, HoareTripleCheckerStatistics: 286 SDtfs, 1294 SDslu, 1208 SDs, 0 SdLazy, 2569 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1258 GetRequests, 729 SyntacticMatches, 5 SemanticMatches, 524 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=23, 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, 24 MinimizatonAttempts, 261 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 89 PreInvPairs, 89 NumberOfFragments, 144 HoareAnnotationTreeSize, 89 FomulaSimplifications, 38139358 FormulaSimplificationTreeSizeReduction, 3.5s HoareSimplificationTime, 5 FomulaSimplificationsInter, 5999924 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1553 NumberOfCodeBlocks, 1553 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 1510 ConstructedInterpolants, 0 QuantifiedInterpolants, 424429 SizeOfPredicates, 121 NumberOfNonLiveVariables, 1919 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 43 InterpolantComputations, 7 PerfectInterpolantSequences, 364/5819 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...