./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 14df269faa4a77275028af94d8141ab36c184cf5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 10:54:43,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:54:43,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:54:43,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:54:43,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:54:43,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:54:43,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:54:43,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:54:43,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:54:43,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:54:43,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:54:43,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:54:43,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:54:43,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:54:43,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:54:43,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:54:43,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:54:43,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:54:43,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:54:43,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:54:43,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:54:43,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:54:43,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:54:43,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:54:43,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:54:43,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:54:43,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:54:43,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:54:43,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:54:43,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:54:43,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:54:43,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:54:43,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:54:43,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:54:43,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:54:43,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:54:43,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:54:43,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:54:43,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:54:43,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:54:43,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:54:43,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-20 10:54:43,222 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:54:43,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:54:43,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:54:43,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:54:43,224 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:54:43,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:54:43,224 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 10:54:43,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:54:43,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:54:43,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 10:54:43,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:54:43,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 10:54:43,226 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-20 10:54:43,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 10:54:43,226 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:54:43,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 10:54:43,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:54:43,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:54:43,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:54:43,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:54:43,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:54:43,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:54:43,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:54:43,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 10:54:43,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 10:54:43,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 10:54:43,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 10:54:43,229 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_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14df269faa4a77275028af94d8141ab36c184cf5 [2019-11-20 10:54:43,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:54:43,394 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:54:43,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:54:43,407 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:54:43,407 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:54:43,408 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-11-20 10:54:43,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/data/b5742fd73/7facc24d8ce844e4a7fbf33c8c345689/FLAG9888cede1 [2019-11-20 10:54:43,810 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:54:43,811 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-11-20 10:54:43,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/data/b5742fd73/7facc24d8ce844e4a7fbf33c8c345689/FLAG9888cede1 [2019-11-20 10:54:44,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/data/b5742fd73/7facc24d8ce844e4a7fbf33c8c345689 [2019-11-20 10:54:44,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:54:44,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 10:54:44,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:54:44,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:54:44,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:54:44,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56715723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44, skipping insertion in model container [2019-11-20 10:54:44,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,210 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:54:44,225 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:54:44,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:54:44,439 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:54:44,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:54:44,580 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:54:44,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44 WrapperNode [2019-11-20 10:54:44,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:54:44,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 10:54:44,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 10:54:44,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 10:54:44,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 10:54:44,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:54:44,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:54:44,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:54:44,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... [2019-11-20 10:54:44,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:54:44,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:54:44,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:54:44,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:54:44,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-20 10:54:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-20 10:54:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:54:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:54:44,963 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:54:44,963 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 10:54:44,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:44 BoogieIcfgContainer [2019-11-20 10:54:44,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:54:44,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:54:44,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:54:44,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:54:44,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:54:44" (1/3) ... [2019-11-20 10:54:44,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57727f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:54:44, skipping insertion in model container [2019-11-20 10:54:44,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:44" (2/3) ... [2019-11-20 10:54:44,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57727f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:54:44, skipping insertion in model container [2019-11-20 10:54:44,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:44" (3/3) ... [2019-11-20 10:54:44,979 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2019-11-20 10:54:44,996 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:54:45,002 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-20 10:54:45,015 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-20 10:54:45,050 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:54:45,050 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 10:54:45,050 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:54:45,050 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:54:45,051 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:54:45,051 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:54:45,052 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:54:45,052 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:54:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-20 10:54:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 10:54:45,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:45,084 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 10:54:45,084 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-11-20 10:54:45,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:45,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280148458] [2019-11-20 10:54:45,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:45,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280148458] [2019-11-20 10:54:45,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:45,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 10:54:45,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359771800] [2019-11-20 10:54:45,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:54:45,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:45,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:54:45,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:54:45,355 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-20 10:54:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:45,503 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-20 10:54:45,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:54:45,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-20 10:54:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:45,516 INFO L225 Difference]: With dead ends: 41 [2019-11-20 10:54:45,516 INFO L226 Difference]: Without dead ends: 36 [2019-11-20 10:54:45,520 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 [2019-11-20 10:54:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-20 10:54:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-20 10:54:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 10:54:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-20 10:54:45,572 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-11-20 10:54:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:45,572 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-20 10:54:45,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:54:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-20 10:54:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:54:45,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:45,574 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:45,576 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-11-20 10:54:45,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:45,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822879971] [2019-11-20 10:54:45,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:45,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822879971] [2019-11-20 10:54:45,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:45,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 10:54:45,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888366118] [2019-11-20 10:54:45,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:54:45,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:45,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:54:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:54:45,636 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-11-20 10:54:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:45,750 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-11-20 10:54:45,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:54:45,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-20 10:54:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:45,753 INFO L225 Difference]: With dead ends: 50 [2019-11-20 10:54:45,753 INFO L226 Difference]: Without dead ends: 46 [2019-11-20 10:54:45,754 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 [2019-11-20 10:54:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-20 10:54:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-11-20 10:54:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 10:54:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-20 10:54:45,765 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-11-20 10:54:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:45,766 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-20 10:54:45,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:54:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-20 10:54:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 10:54:45,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:45,767 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:45,767 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-11-20 10:54:45,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:45,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767177398] [2019-11-20 10:54:45,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:45,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767177398] [2019-11-20 10:54:45,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911788172] [2019-11-20 10:54:45,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:45,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 10:54:45,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:45,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:45,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-20 10:54:45,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629390209] [2019-11-20 10:54:45,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 10:54:45,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:45,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 10:54:45,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:54:45,923 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-11-20 10:54:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:46,060 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-11-20 10:54:46,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 10:54:46,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-20 10:54:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:46,063 INFO L225 Difference]: With dead ends: 63 [2019-11-20 10:54:46,063 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 10:54:46,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:54:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 10:54:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-11-20 10:54:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 10:54:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-11-20 10:54:46,095 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-11-20 10:54:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:46,096 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-11-20 10:54:46,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 10:54:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-11-20 10:54:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 10:54:46,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:46,097 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:46,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:46,309 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-11-20 10:54:46,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:46,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664175148] [2019-11-20 10:54:46,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:46,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664175148] [2019-11-20 10:54:46,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:46,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 10:54:46,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811268706] [2019-11-20 10:54:46,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:54:46,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:46,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:54:46,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:54:46,355 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 3 states. [2019-11-20 10:54:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:46,373 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-11-20 10:54:46,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:54:46,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-20 10:54:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:46,376 INFO L225 Difference]: With dead ends: 52 [2019-11-20 10:54:46,376 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 10:54:46,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:54:46,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 10:54:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-20 10:54:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-20 10:54:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-20 10:54:46,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-11-20 10:54:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:46,392 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-20 10:54:46,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:54:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-20 10:54:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 10:54:46,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:46,393 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:46,394 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:46,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-11-20 10:54:46,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:46,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698915119] [2019-11-20 10:54:46,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:46,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698915119] [2019-11-20 10:54:46,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:46,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 10:54:46,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060430715] [2019-11-20 10:54:46,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 10:54:46,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 10:54:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:54:46,460 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 4 states. [2019-11-20 10:54:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:46,487 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-11-20 10:54:46,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 10:54:46,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-20 10:54:46,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:46,489 INFO L225 Difference]: With dead ends: 77 [2019-11-20 10:54:46,489 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 10:54:46,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:54:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 10:54:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-11-20 10:54:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 10:54:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2019-11-20 10:54:46,505 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 15 [2019-11-20 10:54:46,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:46,505 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2019-11-20 10:54:46,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 10:54:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2019-11-20 10:54:46,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 10:54:46,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:46,507 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-11-20 10:54:46,507 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-11-20 10:54:46,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:46,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146645897] [2019-11-20 10:54:46,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:46,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146645897] [2019-11-20 10:54:46,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224305160] [2019-11-20 10:54:46,629 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:46,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:54:46,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:46,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 10:54:46,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:46,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:46,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-20 10:54:46,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546144414] [2019-11-20 10:54:46,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 10:54:46,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:46,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 10:54:46,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 10:54:46,698 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 9 states. [2019-11-20 10:54:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:46,883 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-20 10:54:46,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 10:54:46,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-20 10:54:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:46,887 INFO L225 Difference]: With dead ends: 90 [2019-11-20 10:54:46,887 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 10:54:46,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-20 10:54:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 10:54:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-20 10:54:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 10:54:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-11-20 10:54:46,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 17 [2019-11-20 10:54:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:46,917 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-11-20 10:54:46,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 10:54:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-11-20 10:54:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 10:54:46,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:46,919 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:47,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:47,131 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-11-20 10:54:47,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:47,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823842721] [2019-11-20 10:54:47,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:47,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823842721] [2019-11-20 10:54:47,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:47,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 10:54:47,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201731037] [2019-11-20 10:54:47,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:54:47,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:54:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:54:47,204 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 6 states. [2019-11-20 10:54:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:47,393 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-11-20 10:54:47,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 10:54:47,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-20 10:54:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:47,396 INFO L225 Difference]: With dead ends: 117 [2019-11-20 10:54:47,396 INFO L226 Difference]: Without dead ends: 116 [2019-11-20 10:54:47,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:54:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-20 10:54:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-11-20 10:54:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-20 10:54:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-11-20 10:54:47,430 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-11-20 10:54:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:47,431 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-11-20 10:54:47,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:54:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-11-20 10:54:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 10:54:47,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:47,432 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:47,433 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-11-20 10:54:47,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:47,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817039324] [2019-11-20 10:54:47,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:47,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817039324] [2019-11-20 10:54:47,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:47,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 10:54:47,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584892078] [2019-11-20 10:54:47,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:54:47,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:47,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:54:47,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:54:47,528 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-11-20 10:54:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:47,677 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2019-11-20 10:54:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 10:54:47,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-20 10:54:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:47,681 INFO L225 Difference]: With dead ends: 135 [2019-11-20 10:54:47,681 INFO L226 Difference]: Without dead ends: 134 [2019-11-20 10:54:47,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:54:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-20 10:54:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2019-11-20 10:54:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-20 10:54:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2019-11-20 10:54:47,706 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 20 [2019-11-20 10:54:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:47,707 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2019-11-20 10:54:47,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:54:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2019-11-20 10:54:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 10:54:47,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:47,709 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-11-20 10:54:47,709 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-11-20 10:54:47,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:47,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837431896] [2019-11-20 10:54:47,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:47,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837431896] [2019-11-20 10:54:47,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506544047] [2019-11-20 10:54:47,816 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:47,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 10:54:47,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:47,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 10:54:47,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:47,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:47,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-20 10:54:47,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739289439] [2019-11-20 10:54:47,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 10:54:47,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:47,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 10:54:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:54:47,861 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand 11 states. [2019-11-20 10:54:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:48,113 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2019-11-20 10:54:48,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 10:54:48,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-20 10:54:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:48,119 INFO L225 Difference]: With dead ends: 150 [2019-11-20 10:54:48,119 INFO L226 Difference]: Without dead ends: 149 [2019-11-20 10:54:48,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-20 10:54:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-20 10:54:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-11-20 10:54:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-20 10:54:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2019-11-20 10:54:48,156 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 22 [2019-11-20 10:54:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:48,159 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2019-11-20 10:54:48,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 10:54:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2019-11-20 10:54:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 10:54:48,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:48,167 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:48,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:48,377 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-11-20 10:54:48,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:48,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808739485] [2019-11-20 10:54:48,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:48,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808739485] [2019-11-20 10:54:48,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120416345] [2019-11-20 10:54:48,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:48,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:54:48,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:48,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:54:48,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:48,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:48,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-20 10:54:48,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267732653] [2019-11-20 10:54:48,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:54:48,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:54:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:54:48,534 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand 8 states. [2019-11-20 10:54:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:48,772 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2019-11-20 10:54:48,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 10:54:48,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-20 10:54:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:48,776 INFO L225 Difference]: With dead ends: 174 [2019-11-20 10:54:48,776 INFO L226 Difference]: Without dead ends: 173 [2019-11-20 10:54:48,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-20 10:54:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-20 10:54:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2019-11-20 10:54:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-20 10:54:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2019-11-20 10:54:48,797 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 25 [2019-11-20 10:54:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:48,797 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2019-11-20 10:54:48,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:54:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2019-11-20 10:54:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 10:54:48,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:48,804 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-11-20 10:54:49,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:49,008 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-11-20 10:54:49,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:49,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223443911] [2019-11-20 10:54:49,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:54:49,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223443911] [2019-11-20 10:54:49,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976879043] [2019-11-20 10:54:49,178 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:49,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 10:54:49,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:49,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 10:54:49,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-20 10:54:49,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:49,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-11-20 10:54:49,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184563512] [2019-11-20 10:54:49,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 10:54:49,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 10:54:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-20 10:54:49,300 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 14 states. [2019-11-20 10:54:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:49,415 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2019-11-20 10:54:49,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 10:54:49,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-20 10:54:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:49,418 INFO L225 Difference]: With dead ends: 165 [2019-11-20 10:54:49,418 INFO L226 Difference]: Without dead ends: 164 [2019-11-20 10:54:49,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-11-20 10:54:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-20 10:54:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-11-20 10:54:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-20 10:54:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2019-11-20 10:54:49,435 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 27 [2019-11-20 10:54:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:49,436 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2019-11-20 10:54:49,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 10:54:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2019-11-20 10:54:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 10:54:49,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:49,437 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:49,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:49,645 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-11-20 10:54:49,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:49,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383475800] [2019-11-20 10:54:49,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:49,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383475800] [2019-11-20 10:54:49,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245473079] [2019-11-20 10:54:49,762 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:49,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 10:54:49,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:49,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 10:54:49,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:49,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:49,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-20 10:54:49,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094540233] [2019-11-20 10:54:49,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 10:54:49,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 10:54:49,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:54:49,822 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 10 states. [2019-11-20 10:54:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:50,180 INFO L93 Difference]: Finished difference Result 194 states and 248 transitions. [2019-11-20 10:54:50,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 10:54:50,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-20 10:54:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:50,184 INFO L225 Difference]: With dead ends: 194 [2019-11-20 10:54:50,184 INFO L226 Difference]: Without dead ends: 193 [2019-11-20 10:54:50,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-20 10:54:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-20 10:54:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2019-11-20 10:54:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-20 10:54:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2019-11-20 10:54:50,204 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 30 [2019-11-20 10:54:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:50,205 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2019-11-20 10:54:50,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 10:54:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2019-11-20 10:54:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 10:54:50,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:50,213 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:50,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:50,418 INFO L410 AbstractCegarLoop]: === Iteration 13 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:50,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1629013057, now seen corresponding path program 1 times [2019-11-20 10:54:50,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:50,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850953687] [2019-11-20 10:54:50,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:50,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850953687] [2019-11-20 10:54:50,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:50,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 10:54:50,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147200180] [2019-11-20 10:54:50,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:54:50,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:50,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:54:50,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:54:50,497 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand 5 states. [2019-11-20 10:54:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:50,538 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2019-11-20 10:54:50,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 10:54:50,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-20 10:54:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:50,543 INFO L225 Difference]: With dead ends: 179 [2019-11-20 10:54:50,544 INFO L226 Difference]: Without dead ends: 178 [2019-11-20 10:54:50,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:54:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-20 10:54:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-11-20 10:54:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-20 10:54:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 218 transitions. [2019-11-20 10:54:50,560 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 218 transitions. Word has length 31 [2019-11-20 10:54:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:50,560 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 218 transitions. [2019-11-20 10:54:50,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:54:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 218 transitions. [2019-11-20 10:54:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 10:54:50,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:50,564 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:50,564 INFO L410 AbstractCegarLoop]: === Iteration 14 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash 857271516, now seen corresponding path program 4 times [2019-11-20 10:54:50,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:50,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002783409] [2019-11-20 10:54:50,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 10:54:50,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002783409] [2019-11-20 10:54:50,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781705136] [2019-11-20 10:54:50,662 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:50,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 10:54:50,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:50,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 10:54:50,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-20 10:54:50,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 10:54:50,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2019-11-20 10:54:50,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569158876] [2019-11-20 10:54:50,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:54:50,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:54:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-20 10:54:50,770 INFO L87 Difference]: Start difference. First operand 178 states and 218 transitions. Second operand 6 states. [2019-11-20 10:54:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:50,857 INFO L93 Difference]: Finished difference Result 239 states and 303 transitions. [2019-11-20 10:54:50,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 10:54:50,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-20 10:54:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:50,860 INFO L225 Difference]: With dead ends: 239 [2019-11-20 10:54:50,860 INFO L226 Difference]: Without dead ends: 111 [2019-11-20 10:54:50,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-11-20 10:54:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-20 10:54:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2019-11-20 10:54:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-20 10:54:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-11-20 10:54:50,881 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 35 [2019-11-20 10:54:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:50,881 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-11-20 10:54:50,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:54:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-11-20 10:54:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 10:54:50,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:50,884 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:51,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:51,088 INFO L410 AbstractCegarLoop]: === Iteration 15 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash -490250333, now seen corresponding path program 1 times [2019-11-20 10:54:51,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:51,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902539213] [2019-11-20 10:54:51,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:51,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902539213] [2019-11-20 10:54:51,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:51,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 10:54:51,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650983932] [2019-11-20 10:54:51,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 10:54:51,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 10:54:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:54:51,160 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 7 states. [2019-11-20 10:54:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:51,304 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-11-20 10:54:51,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 10:54:51,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-20 10:54:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:51,306 INFO L225 Difference]: With dead ends: 106 [2019-11-20 10:54:51,306 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 10:54:51,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-20 10:54:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 10:54:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-11-20 10:54:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-20 10:54:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2019-11-20 10:54:51,323 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 35 [2019-11-20 10:54:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:51,323 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2019-11-20 10:54:51,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 10:54:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2019-11-20 10:54:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 10:54:51,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:51,325 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:51,325 INFO L410 AbstractCegarLoop]: === Iteration 16 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1982108899, now seen corresponding path program 1 times [2019-11-20 10:54:51,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:51,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910874623] [2019-11-20 10:54:51,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:51,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910874623] [2019-11-20 10:54:51,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:54:51,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 10:54:51,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266944332] [2019-11-20 10:54:51,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 10:54:51,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 10:54:51,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:54:51,396 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 7 states. [2019-11-20 10:54:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:51,545 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-11-20 10:54:51,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 10:54:51,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-20 10:54:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:51,547 INFO L225 Difference]: With dead ends: 124 [2019-11-20 10:54:51,547 INFO L226 Difference]: Without dead ends: 123 [2019-11-20 10:54:51,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-20 10:54:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-20 10:54:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-11-20 10:54:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-20 10:54:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2019-11-20 10:54:51,562 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 36 [2019-11-20 10:54:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:51,565 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2019-11-20 10:54:51,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 10:54:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2019-11-20 10:54:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 10:54:51,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:51,567 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:51,567 INFO L410 AbstractCegarLoop]: === Iteration 17 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash -732976513, now seen corresponding path program 2 times [2019-11-20 10:54:51,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:51,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349927606] [2019-11-20 10:54:51,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:51,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349927606] [2019-11-20 10:54:51,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052377726] [2019-11-20 10:54:51,718 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:51,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:54:51,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:51,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 10:54:51,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:51,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:51,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-20 10:54:51,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364603844] [2019-11-20 10:54:51,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 10:54:51,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 10:54:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 10:54:51,787 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 9 states. [2019-11-20 10:54:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:52,046 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2019-11-20 10:54:52,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 10:54:52,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-20 10:54:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:52,048 INFO L225 Difference]: With dead ends: 140 [2019-11-20 10:54:52,048 INFO L226 Difference]: Without dead ends: 139 [2019-11-20 10:54:52,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-20 10:54:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-20 10:54:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-11-20 10:54:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-20 10:54:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2019-11-20 10:54:52,059 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 41 [2019-11-20 10:54:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:52,060 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2019-11-20 10:54:52,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 10:54:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2019-11-20 10:54:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 10:54:52,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:52,061 INFO L410 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:52,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:52,268 INFO L410 AbstractCegarLoop]: === Iteration 18 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2029893219, now seen corresponding path program 3 times [2019-11-20 10:54:52,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:52,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036991193] [2019-11-20 10:54:52,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:52,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036991193] [2019-11-20 10:54:52,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440827869] [2019-11-20 10:54:52,374 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:52,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 10:54:52,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:52,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 10:54:52,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:52,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:52,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-20 10:54:52,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914813087] [2019-11-20 10:54:52,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 10:54:52,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 10:54:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:54:52,432 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 11 states. [2019-11-20 10:54:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:52,795 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2019-11-20 10:54:52,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 10:54:52,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-20 10:54:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:52,797 INFO L225 Difference]: With dead ends: 158 [2019-11-20 10:54:52,797 INFO L226 Difference]: Without dead ends: 157 [2019-11-20 10:54:52,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2019-11-20 10:54:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-20 10:54:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-20 10:54:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-20 10:54:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-11-20 10:54:52,806 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 46 [2019-11-20 10:54:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:52,806 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-11-20 10:54:52,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 10:54:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-11-20 10:54:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 10:54:52,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:52,808 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:53,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:53,011 INFO L410 AbstractCegarLoop]: === Iteration 19 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash -613451521, now seen corresponding path program 4 times [2019-11-20 10:54:53,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:53,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929080324] [2019-11-20 10:54:53,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:53,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929080324] [2019-11-20 10:54:53,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855850997] [2019-11-20 10:54:53,171 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:53,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 10:54:53,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:53,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 10:54:53,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:53,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:54:53,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-20 10:54:53,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416126712] [2019-11-20 10:54:53,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 10:54:53,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 10:54:53,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-20 10:54:53,249 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2019-11-20 10:54:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:53,771 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2019-11-20 10:54:53,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 10:54:53,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-20 10:54:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:53,773 INFO L225 Difference]: With dead ends: 176 [2019-11-20 10:54:53,774 INFO L226 Difference]: Without dead ends: 175 [2019-11-20 10:54:53,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 10:54:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-20 10:54:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-20 10:54:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-20 10:54:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2019-11-20 10:54:53,785 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 51 [2019-11-20 10:54:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:53,786 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2019-11-20 10:54:53,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 10:54:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2019-11-20 10:54:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-20 10:54:53,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:54:53,788 INFO L410 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:54:53,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:53,992 INFO L410 AbstractCegarLoop]: === Iteration 20 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-20 10:54:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:54:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1845164003, now seen corresponding path program 5 times [2019-11-20 10:54:53,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:54:53,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861751240] [2019-11-20 10:54:53,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:54:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:54:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 10:54:54,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861751240] [2019-11-20 10:54:54,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339322237] [2019-11-20 10:54:54,158 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/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 [2019-11-20 10:54:54,198 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 10:54:54,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:54:54,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 10:54:54,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:54:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-20 10:54:54,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 10:54:54,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2019-11-20 10:54:54,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918102581] [2019-11-20 10:54:54,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 10:54:54,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:54:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 10:54:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-11-20 10:54:54,306 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 7 states. [2019-11-20 10:54:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:54:54,400 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2019-11-20 10:54:54,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 10:54:54,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-11-20 10:54:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:54:54,402 INFO L225 Difference]: With dead ends: 215 [2019-11-20 10:54:54,402 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 10:54:54,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2019-11-20 10:54:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 10:54:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 10:54:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 10:54:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 10:54:54,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-11-20 10:54:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:54:54,405 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 10:54:54,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 10:54:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 10:54:54,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 10:54:54,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:54:54,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 10:54:54,856 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2019-11-20 10:54:54,939 INFO L444 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-11-20 10:54:54,939 INFO L444 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,939 INFO L444 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,940 INFO L440 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (not (= 0 |g_#in~x|)) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-11-20 10:54:54,940 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-11-20 10:54:54,940 INFO L444 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,940 INFO L444 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,940 INFO L444 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,940 INFO L444 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,940 INFO L440 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= 0 |g_#in~x|)) (or (not (<= 0 |g_#in~x|)) (and (<= 0 g_~x) (<= g_~x 2147483647) (<= |g_#t~ret0| 1) (<= 1 |g_#t~ret0|) (not (= 0 g_~x))) (not (<= |g_#in~x| 2147483647)))) [2019-11-20 10:54:54,940 INFO L444 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L447 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 10:54:54,941 INFO L440 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-11-20 10:54:54,942 INFO L444 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-11-20 10:54:54,942 INFO L444 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-20 10:54:54,942 INFO L440 ceAbstractionStarter]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-11-20 10:54:54,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:54:54 BoogieIcfgContainer [2019-11-20 10:54:54,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:54:54,956 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:54:54,956 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:54:54,956 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:54:54,957 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:44" (3/4) ... [2019-11-20 10:54:54,961 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 10:54:54,968 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-11-20 10:54:54,979 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 10:54:54,979 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 10:54:55,013 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f1250fd0-adbb-48b9-9d29-187c29a34b8e/bin/uautomizer/witness.graphml [2019-11-20 10:54:55,013 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:54:55,014 INFO L168 Benchmark]: Toolchain (without parser) took 10820.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -138.6 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. [2019-11-20 10:54:55,015 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:54:55,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -171.1 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. [2019-11-20 10:54:55,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:54:55,016 INFO L168 Benchmark]: Boogie Preprocessor took 17.46 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:54:55,017 INFO L168 Benchmark]: RCFGBuilder took 331.38 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-20 10:54:55,017 INFO L168 Benchmark]: TraceAbstraction took 9989.98 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.8 MB). Peak memory consumption was 45.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:54:55,018 INFO L168 Benchmark]: Witness Printer took 57.11 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: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2019-11-20 10:54:55,020 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 384.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -171.1 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.46 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 331.38 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9989.98 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.8 MB). Peak memory consumption was 45.4 MB. Max. memory is 11.5 GB. * Witness Printer took 57.11 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: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 4 error locations. Result: SAFE, OverallTime: 9.8s, OverallIterations: 20, TraceHistogramMax: 9, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 371 SDtfs, 640 SDslu, 1406 SDs, 0 SdLazy, 1497 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 690 GetRequests, 438 SyntacticMatches, 4 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 170 PreInvPairs, 182 NumberOfFragments, 67 HoareAnnotationTreeSize, 170 FomulaSimplifications, 254 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 907 NumberOfCodeBlocks, 866 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 876 ConstructedInterpolants, 0 QuantifiedInterpolants, 77162 SizeOfPredicates, 30 NumberOfNonLiveVariables, 656 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 934/1271 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...