./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/jain_5_false-no-overflow.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/jain_5_false-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f456498ea4ee3e935d2141415dc278d806dc9d00 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 14:25:48,160 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 14:25:48,161 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 14:25:48,167 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 14:25:48,168 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 14:25:48,168 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 14:25:48,169 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 14:25:48,170 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 14:25:48,171 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 14:25:48,172 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 14:25:48,172 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 14:25:48,172 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 14:25:48,173 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 14:25:48,174 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 14:25:48,174 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 14:25:48,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 14:25:48,175 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 14:25:48,176 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 14:25:48,177 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 14:25:48,177 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 14:25:48,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 14:25:48,178 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 14:25:48,179 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 14:25:48,179 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 14:25:48,179 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 14:25:48,180 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 14:25:48,180 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 14:25:48,181 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 14:25:48,181 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 14:25:48,181 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 14:25:48,181 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 14:25:48,182 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 14:25:48,182 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 14:25:48,182 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 14:25:48,182 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 14:25:48,183 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 14:25:48,183 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-12-09 14:25:48,190 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 14:25:48,190 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 14:25:48,190 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 14:25:48,190 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 14:25:48,190 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 14:25:48,191 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 14:25:48,191 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 14:25:48,192 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 14:25:48,192 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 14:25:48,192 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 14:25:48,192 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 14:25:48,192 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 14:25:48,192 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 14:25:48,192 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 14:25:48,193 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 14:25:48,193 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 14:25:48,193 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-09 14:25:48,193 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 14:25:48,193 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 14:25:48,193 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 14:25:48,193 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 14:25:48,194 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 14:25:48,194 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 14:25:48,194 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 14:25:48,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 14:25:48,194 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 14:25:48,194 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 14:25:48,194 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 14:25:48,195 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 14:25:48,195 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 14:25:48,195 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 14:25:48,195 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 14:25:48,195 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f456498ea4ee3e935d2141415dc278d806dc9d00 [2018-12-09 14:25:48,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 14:25:48,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 14:25:48,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 14:25:48,228 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 14:25:48,228 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 14:25:48,229 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/jain_5_false-no-overflow.i [2018-12-09 14:25:48,266 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/data/b570b36f2/860fceb150e84215963a0bb7983816b7/FLAG20441cc34 [2018-12-09 14:25:48,549 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 14:25:48,550 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/sv-benchmarks/c/bitvector/jain_5_false-no-overflow.i [2018-12-09 14:25:48,553 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/data/b570b36f2/860fceb150e84215963a0bb7983816b7/FLAG20441cc34 [2018-12-09 14:25:48,995 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/data/b570b36f2/860fceb150e84215963a0bb7983816b7 [2018-12-09 14:25:48,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 14:25:48,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 14:25:48,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 14:25:48,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 14:25:49,000 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 14:25:49,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:25:48" (1/1) ... [2018-12-09 14:25:49,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6e1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49, skipping insertion in model container [2018-12-09 14:25:49,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:25:48" (1/1) ... [2018-12-09 14:25:49,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 14:25:49,015 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 14:25:49,094 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 14:25:49,096 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 14:25:49,104 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 14:25:49,112 INFO L195 MainTranslator]: Completed translation [2018-12-09 14:25:49,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49 WrapperNode [2018-12-09 14:25:49,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 14:25:49,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 14:25:49,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 14:25:49,113 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 14:25:49,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 14:25:49,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 14:25:49,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 14:25:49,124 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 14:25:49,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... [2018-12-09 14:25:49,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 14:25:49,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 14:25:49,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 14:25:49,136 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 14:25:49,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/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 [2018-12-09 14:25:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 14:25:49,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 14:25:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 14:25:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 14:25:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 14:25:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 14:25:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 14:25:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 14:25:49,299 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 14:25:49,299 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 14:25:49,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:25:49 BoogieIcfgContainer [2018-12-09 14:25:49,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 14:25:49,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 14:25:49,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 14:25:49,302 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 14:25:49,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:25:48" (1/3) ... [2018-12-09 14:25:49,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1719b0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:25:49, skipping insertion in model container [2018-12-09 14:25:49,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:25:49" (2/3) ... [2018-12-09 14:25:49,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1719b0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:25:49, skipping insertion in model container [2018-12-09 14:25:49,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:25:49" (3/3) ... [2018-12-09 14:25:49,304 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5_false-no-overflow.i [2018-12-09 14:25:49,309 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 14:25:49,314 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-12-09 14:25:49,323 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-12-09 14:25:49,342 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 14:25:49,342 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 14:25:49,342 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 14:25:49,342 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 14:25:49,342 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 14:25:49,342 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 14:25:49,342 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 14:25:49,342 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 14:25:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-12-09 14:25:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-09 14:25:49,356 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:49,356 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:49,357 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:49,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1145425065, now seen corresponding path program 1 times [2018-12-09 14:25:49,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:49,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,390 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 14:25:49,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 14:25:49,438 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:25:49,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 14:25:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 14:25:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,450 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2018-12-09 14:25:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:49,481 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2018-12-09 14:25:49,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 14:25:49,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-09 14:25:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:49,487 INFO L225 Difference]: With dead ends: 43 [2018-12-09 14:25:49,487 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 14:25:49,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 14:25:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-09 14:25:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 14:25:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-09 14:25:49,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 7 [2018-12-09 14:25:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:49,511 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-09 14:25:49,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 14:25:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-09 14:25:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-09 14:25:49,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:49,512 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:49,512 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:49,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1148438694, now seen corresponding path program 1 times [2018-12-09 14:25:49,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:49,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,514 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 14:25:49,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 14:25:49,535 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:25:49,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 14:25:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 14:25:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,537 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2018-12-09 14:25:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:49,552 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-09 14:25:49,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 14:25:49,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-09 14:25:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:49,554 INFO L225 Difference]: With dead ends: 23 [2018-12-09 14:25:49,554 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 14:25:49,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 14:25:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-09 14:25:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 14:25:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-12-09 14:25:49,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 8 [2018-12-09 14:25:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:49,557 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-12-09 14:25:49,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 14:25:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-12-09 14:25:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 14:25:49,557 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:49,557 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:49,557 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:49,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1241861195, now seen corresponding path program 1 times [2018-12-09 14:25:49,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:49,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,558 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,568 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 14:25:49,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 14:25:49,569 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:25:49,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 14:25:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 14:25:49,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,569 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2018-12-09 14:25:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:49,589 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-09 14:25:49,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 14:25:49,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-09 14:25:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:49,590 INFO L225 Difference]: With dead ends: 25 [2018-12-09 14:25:49,590 INFO L226 Difference]: Without dead ends: 24 [2018-12-09 14:25:49,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-09 14:25:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-09 14:25:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-09 14:25:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-12-09 14:25:49,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 9 [2018-12-09 14:25:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:49,593 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-12-09 14:25:49,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 14:25:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-12-09 14:25:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 14:25:49,594 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:49,594 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:49,594 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:49,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -157008568, now seen corresponding path program 1 times [2018-12-09 14:25:49,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:49,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,596 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 14:25:49,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 14:25:49,608 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:25:49,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 14:25:49,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 14:25:49,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,608 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 3 states. [2018-12-09 14:25:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:49,620 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-09 14:25:49,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 14:25:49,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 14:25:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:49,621 INFO L225 Difference]: With dead ends: 23 [2018-12-09 14:25:49,621 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 14:25:49,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 14:25:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 14:25:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-09 14:25:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 14:25:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-12-09 14:25:49,624 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 10 [2018-12-09 14:25:49,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:49,624 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-12-09 14:25:49,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 14:25:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-12-09 14:25:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 14:25:49,624 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:49,624 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:49,625 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:49,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash 793707535, now seen corresponding path program 1 times [2018-12-09 14:25:49,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:49,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,626 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:49,654 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:49,655 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-09 14:25:49,656 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [14], [15], [17], [19], [21], [28], [35], [37], [38], [39], [40], [42], [43] [2018-12-09 14:25:49,675 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 14:25:49,675 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 14:25:49,774 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 14:25:49,775 INFO L272 AbstractInterpreter]: Visited 16 different actions 44 times. Merged at 7 different actions 18 times. Never widened. Performed 108 root evaluator evaluations with a maximum evaluation depth of 5. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-09 14:25:49,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 14:25:49,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:49,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:49,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,786 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:25:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:49,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-09 14:25:49,888 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:49,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 14:25:49,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 14:25:49,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-09 14:25:49,889 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-12-09 14:25:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:49,944 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-09 14:25:49,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 14:25:49,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-12-09 14:25:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:49,946 INFO L225 Difference]: With dead ends: 29 [2018-12-09 14:25:49,946 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 14:25:49,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2018-12-09 14:25:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 14:25:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-09 14:25:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 14:25:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-09 14:25:49,953 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 17 [2018-12-09 14:25:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:49,954 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-09 14:25:49,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 14:25:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-09 14:25:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 14:25:49,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:49,955 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:49,955 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:49,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1164870144, now seen corresponding path program 1 times [2018-12-09 14:25:49,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:49,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:49,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:49,956 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:49,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:49,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:49,989 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-12-09 14:25:49,990 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [15], [16], [17], [19], [21], [28], [35], [37], [38], [39], [40], [42], [43] [2018-12-09 14:25:49,990 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 14:25:49,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 14:25:50,018 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 14:25:50,018 INFO L272 AbstractInterpreter]: Visited 16 different actions 44 times. Merged at 7 different actions 18 times. Never widened. Performed 108 root evaluator evaluations with a maximum evaluation depth of 5. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-09 14:25:50,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:50,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 14:25:50,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,019 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:50,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:50,026 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:25:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:50,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:50,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:50,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 14:25:50,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2018-12-09 14:25:50,098 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:25:50,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 14:25:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 14:25:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-09 14:25:50,099 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-12-09 14:25:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:50,120 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-09 14:25:50,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 14:25:50,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-12-09 14:25:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:50,121 INFO L225 Difference]: With dead ends: 26 [2018-12-09 14:25:50,121 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 14:25:50,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-12-09 14:25:50,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 14:25:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-09 14:25:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 14:25:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-09 14:25:50,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2018-12-09 14:25:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:50,124 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-09 14:25:50,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 14:25:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-09 14:25:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 14:25:50,125 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:50,125 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:50,125 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:50,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1751236047, now seen corresponding path program 1 times [2018-12-09 14:25:50,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:50,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,142 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:50,142 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-09 14:25:50,142 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [15], [17], [18], [19], [21], [28], [35], [37], [38], [39], [40], [42], [43] [2018-12-09 14:25:50,143 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 14:25:50,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 14:25:50,179 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 14:25:50,179 INFO L272 AbstractInterpreter]: Visited 16 different actions 44 times. Merged at 6 different actions 17 times. Never widened. Performed 109 root evaluator evaluations with a maximum evaluation depth of 5. Performed 109 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 2 fixpoints after 2 different actions. Largest state had 2 variables. [2018-12-09 14:25:50,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:50,184 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 14:25:50,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,185 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:50,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:50,191 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:25:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:50,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:50,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:25:50,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:50,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-09 14:25:50,230 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:50,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 14:25:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 14:25:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 14:25:50,231 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2018-12-09 14:25:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:50,245 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-09 14:25:50,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 14:25:50,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-12-09 14:25:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:50,245 INFO L225 Difference]: With dead ends: 29 [2018-12-09 14:25:50,245 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 14:25:50,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 14:25:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 14:25:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-09 14:25:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 14:25:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-09 14:25:50,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2018-12-09 14:25:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:50,250 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-09 14:25:50,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 14:25:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-09 14:25:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 14:25:50,250 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:50,250 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:50,251 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:50,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash 413053941, now seen corresponding path program 2 times [2018-12-09 14:25:50,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:50,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,252 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 14:25:50,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,288 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:50,288 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:25:50,288 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:25:50,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,288 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:50,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:25:50,294 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:25:50,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 14:25:50,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:25:50,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 14:25:50,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 14:25:50,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:50,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-09 14:25:50,424 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:50,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 14:25:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 14:25:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-12-09 14:25:50,424 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2018-12-09 14:25:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:50,490 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-12-09 14:25:50,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 14:25:50,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-12-09 14:25:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:50,491 INFO L225 Difference]: With dead ends: 33 [2018-12-09 14:25:50,491 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 14:25:50,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-12-09 14:25:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 14:25:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-09 14:25:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-09 14:25:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-09 14:25:50,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-12-09 14:25:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:50,494 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-09 14:25:50,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 14:25:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-09 14:25:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-09 14:25:50,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:50,495 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:50,495 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:50,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1807847575, now seen corresponding path program 2 times [2018-12-09 14:25:50,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:50,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:25:50,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,496 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 14:25:50,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:50,521 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:25:50,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:25:50,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:50,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:25:50,527 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:25:50,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 14:25:50,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:25:50,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 14:25:50,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 14:25:50,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:50,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2018-12-09 14:25:50,634 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:50,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 14:25:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 14:25:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-12-09 14:25:50,635 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-12-09 14:25:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:50,747 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2018-12-09 14:25:50,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 14:25:50,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-12-09 14:25:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:50,748 INFO L225 Difference]: With dead ends: 38 [2018-12-09 14:25:50,748 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 14:25:50,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2018-12-09 14:25:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 14:25:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-12-09 14:25:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 14:25:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-12-09 14:25:50,753 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 29 [2018-12-09 14:25:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:50,753 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-12-09 14:25:50,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 14:25:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-12-09 14:25:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 14:25:50,754 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:50,754 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:50,755 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:50,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 114834523, now seen corresponding path program 3 times [2018-12-09 14:25:50,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:50,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:25:50,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:50,756 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 14:25:50,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:50,818 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:25:50,818 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:25:50,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:50,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:50,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 14:25:50,824 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 14:25:50,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 14:25:50,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:25:50,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 14:25:50,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 14:25:51,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:51,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-09 14:25:51,028 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:51,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 14:25:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 14:25:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2018-12-09 14:25:51,029 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 16 states. [2018-12-09 14:25:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:51,093 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-12-09 14:25:51,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 14:25:51,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-12-09 14:25:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:51,094 INFO L225 Difference]: With dead ends: 38 [2018-12-09 14:25:51,094 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 14:25:51,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-12-09 14:25:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 14:25:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-12-09 14:25:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 14:25:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-12-09 14:25:51,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 37 [2018-12-09 14:25:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:51,097 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-12-09 14:25:51,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 14:25:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-12-09 14:25:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-09 14:25:51,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:51,098 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:51,098 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:51,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash 333905217, now seen corresponding path program 4 times [2018-12-09 14:25:51,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:51,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:25:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:51,099 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-09 14:25:51,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:51,147 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:51,148 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:25:51,148 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:25:51,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:51,148 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:51,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:51,155 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:25:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:51,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-09 14:25:51,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-09 14:25:52,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:52,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-09 14:25:52,332 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:52,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-09 14:25:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-09 14:25:52,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=576, Unknown=4, NotChecked=0, Total=812 [2018-12-09 14:25:52,333 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 20 states. [2018-12-09 14:25:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:52,407 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-12-09 14:25:52,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 14:25:52,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-12-09 14:25:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:52,408 INFO L225 Difference]: With dead ends: 44 [2018-12-09 14:25:52,408 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 14:25:52,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=716, Unknown=4, NotChecked=0, Total=1056 [2018-12-09 14:25:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 14:25:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-12-09 14:25:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 14:25:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-12-09 14:25:52,411 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 47 [2018-12-09 14:25:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:52,411 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-12-09 14:25:52,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-09 14:25:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-12-09 14:25:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 14:25:52,412 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:52,412 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:52,412 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:52,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:52,412 INFO L82 PathProgramCache]: Analyzing trace with hash -218212697, now seen corresponding path program 5 times [2018-12-09 14:25:52,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:52,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:52,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:25:52,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:52,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 14:25:52,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:52,475 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:52,475 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:25:52,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:25:52,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:52,475 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:52,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:25:52,482 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:25:52,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 14:25:52,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:25:52,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 14:25:52,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:25:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 14:25:54,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:25:54,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-09 14:25:54,868 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:25:54,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-09 14:25:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-09 14:25:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=856, Unknown=9, NotChecked=0, Total=1190 [2018-12-09 14:25:54,869 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 24 states. [2018-12-09 14:25:54,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:25:54,972 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-12-09 14:25:54,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 14:25:54,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-12-09 14:25:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:25:54,973 INFO L225 Difference]: With dead ends: 50 [2018-12-09 14:25:54,973 INFO L226 Difference]: Without dead ends: 49 [2018-12-09 14:25:54,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=480, Invalid=1071, Unknown=9, NotChecked=0, Total=1560 [2018-12-09 14:25:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-09 14:25:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-12-09 14:25:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 14:25:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2018-12-09 14:25:54,976 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 57 [2018-12-09 14:25:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:25:54,977 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2018-12-09 14:25:54,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-09 14:25:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2018-12-09 14:25:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-09 14:25:54,977 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:25:54,977 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-12-09 14:25:54,977 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:25:54,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:25:54,978 INFO L82 PathProgramCache]: Analyzing trace with hash -157702003, now seen corresponding path program 6 times [2018-12-09 14:25:54,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:25:54,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:54,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:25:54,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:25:54,978 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:25:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:25:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-09 14:25:55,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:55,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:25:55,058 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:25:55,058 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:25:55,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:25:55,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:25:55,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 14:25:55,065 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 14:25:55,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 14:25:55,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:25:55,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:25:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-09 14:25:55,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:26:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-09 14:26:03,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:26:03,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-09 14:26:03,635 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:26:03,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-09 14:26:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-09 14:26:03,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1183, Unknown=25, NotChecked=0, Total=1640 [2018-12-09 14:26:03,636 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 28 states. [2018-12-09 14:26:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:26:03,743 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-12-09 14:26:03,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 14:26:03,743 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-12-09 14:26:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:26:03,744 INFO L225 Difference]: With dead ends: 56 [2018-12-09 14:26:03,744 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 14:26:03,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=648, Invalid=1489, Unknown=25, NotChecked=0, Total=2162 [2018-12-09 14:26:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 14:26:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-12-09 14:26:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-09 14:26:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2018-12-09 14:26:03,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 67 [2018-12-09 14:26:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:26:03,748 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2018-12-09 14:26:03,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-09 14:26:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2018-12-09 14:26:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-09 14:26:03,748 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:26:03,748 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-09 14:26:03,748 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:26:03,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:26:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1770237197, now seen corresponding path program 7 times [2018-12-09 14:26:03,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:26:03,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:26:03,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:26:03,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:26:03,749 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:26:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:26:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-09 14:26:03,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:26:03,850 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:26:03,850 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:26:03,850 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:26:03,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:26:03,850 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:26:03,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:26:03,855 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:26:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:26:03,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:26:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-09 14:26:04,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:26:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-09 14:26:14,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:26:14,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-09 14:26:14,962 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:26:14,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-09 14:26:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-09 14:26:14,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=1579, Unknown=28, NotChecked=0, Total=2162 [2018-12-09 14:26:14,963 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 32 states. [2018-12-09 14:26:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:26:15,110 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-12-09 14:26:15,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 14:26:15,110 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-12-09 14:26:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:26:15,111 INFO L225 Difference]: With dead ends: 62 [2018-12-09 14:26:15,111 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 14:26:15,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=842, Invalid=1992, Unknown=28, NotChecked=0, Total=2862 [2018-12-09 14:26:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 14:26:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-12-09 14:26:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-09 14:26:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-12-09 14:26:15,115 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 77 [2018-12-09 14:26:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:26:15,115 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-12-09 14:26:15,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-09 14:26:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-12-09 14:26:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-09 14:26:15,116 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:26:15,116 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-12-09 14:26:15,116 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:26:15,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:26:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1974580697, now seen corresponding path program 8 times [2018-12-09 14:26:15,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:26:15,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:26:15,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:26:15,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:26:15,117 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:26:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:26:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-09 14:26:15,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:26:15,238 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:26:15,238 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:26:15,238 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:26:15,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:26:15,239 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:26:15,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:26:15,245 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:26:15,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 14:26:15,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:26:15,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:26:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-09 14:26:15,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:26:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-09 14:26:35,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:26:35,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-09 14:26:35,457 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:26:35,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-09 14:26:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-09 14:26:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=2005, Unknown=58, NotChecked=0, Total=2756 [2018-12-09 14:26:35,458 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 36 states. [2018-12-09 14:26:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:26:35,611 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2018-12-09 14:26:35,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-09 14:26:35,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-12-09 14:26:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:26:35,612 INFO L225 Difference]: With dead ends: 68 [2018-12-09 14:26:35,612 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 14:26:35,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1061, Invalid=2541, Unknown=58, NotChecked=0, Total=3660 [2018-12-09 14:26:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 14:26:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-12-09 14:26:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-09 14:26:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2018-12-09 14:26:35,617 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 87 [2018-12-09 14:26:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:26:35,617 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2018-12-09 14:26:35,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-09 14:26:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2018-12-09 14:26:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-09 14:26:35,618 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:26:35,618 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-09 14:26:35,618 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:26:35,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:26:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash -393400001, now seen corresponding path program 9 times [2018-12-09 14:26:35,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:26:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:26:35,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:26:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:26:35,619 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:26:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:26:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-12-09 14:26:35,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:26:35,750 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:26:35,750 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:26:35,750 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:26:35,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:26:35,750 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:26:35,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 14:26:35,757 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 14:26:35,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 14:26:35,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:26:35,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:26:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-12-09 14:26:36,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:27:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-12-09 14:27:04,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:27:04,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-09 14:27:04,113 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:27:04,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-09 14:27:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-09 14:27:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=2499, Unknown=77, NotChecked=0, Total=3422 [2018-12-09 14:27:04,114 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 40 states. [2018-12-09 14:27:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:27:04,312 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-12-09 14:27:04,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 14:27:04,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-12-09 14:27:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:27:04,313 INFO L225 Difference]: With dead ends: 74 [2018-12-09 14:27:04,313 INFO L226 Difference]: Without dead ends: 73 [2018-12-09 14:27:04,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=1305, Invalid=3174, Unknown=77, NotChecked=0, Total=4556 [2018-12-09 14:27:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-09 14:27:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-12-09 14:27:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-09 14:27:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2018-12-09 14:27:04,318 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 97 [2018-12-09 14:27:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:27:04,318 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2018-12-09 14:27:04,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-09 14:27:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2018-12-09 14:27:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-12-09 14:27:04,319 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:27:04,319 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-09 14:27:04,319 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:27:04,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:27:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash -89512667, now seen corresponding path program 10 times [2018-12-09 14:27:04,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:27:04,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:27:04,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:27:04,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:27:04,321 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:27:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:27:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-09 14:27:04,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:27:04,469 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:27:04,469 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:27:04,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:27:04,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:27:04,469 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:27:04,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:27:04,476 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:27:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:27:04,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:27:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-09 14:27:04,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:27:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-09 14:27:58,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:27:58,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-09 14:27:58,020 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:27:58,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-09 14:27:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-09 14:27:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=3053, Unknown=95, NotChecked=0, Total=4160 [2018-12-09 14:27:58,021 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 44 states. [2018-12-09 14:27:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:27:58,250 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2018-12-09 14:27:58,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-09 14:27:58,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-12-09 14:27:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:27:58,251 INFO L225 Difference]: With dead ends: 80 [2018-12-09 14:27:58,251 INFO L226 Difference]: Without dead ends: 79 [2018-12-09 14:27:58,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=1572, Invalid=3883, Unknown=95, NotChecked=0, Total=5550 [2018-12-09 14:27:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-09 14:27:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-12-09 14:27:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-09 14:27:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2018-12-09 14:27:58,256 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 107 [2018-12-09 14:27:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:27:58,256 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2018-12-09 14:27:58,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-09 14:27:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2018-12-09 14:27:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-09 14:27:58,257 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:27:58,257 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-12-09 14:27:58,258 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:27:58,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:27:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash -185863797, now seen corresponding path program 11 times [2018-12-09 14:27:58,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:27:58,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:27:58,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:27:58,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:27:58,259 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:27:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:27:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-12-09 14:27:58,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:27:58,433 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:27:58,434 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:27:58,434 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:27:58,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:27:58,434 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:27:58,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:27:58,440 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:27:58,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-09 14:27:58,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:27:58,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:27:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-12-09 14:27:58,808 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:29:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-12-09 14:29:05,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:29:05,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-09 14:29:05,179 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:29:05,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-09 14:29:05,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-09 14:29:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=3648, Unknown=126, NotChecked=0, Total=4970 [2018-12-09 14:29:05,180 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 48 states. [2018-12-09 14:29:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:29:05,430 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2018-12-09 14:29:05,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-09 14:29:05,431 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-12-09 14:29:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:29:05,431 INFO L225 Difference]: With dead ends: 86 [2018-12-09 14:29:05,431 INFO L226 Difference]: Without dead ends: 85 [2018-12-09 14:29:05,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=1867, Invalid=4649, Unknown=126, NotChecked=0, Total=6642 [2018-12-09 14:29:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-09 14:29:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-12-09 14:29:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-09 14:29:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2018-12-09 14:29:05,436 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 117 [2018-12-09 14:29:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:29:05,436 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2018-12-09 14:29:05,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-09 14:29:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2018-12-09 14:29:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-12-09 14:29:05,437 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:29:05,437 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-09 14:29:05,437 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:29:05,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:29:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1669199473, now seen corresponding path program 12 times [2018-12-09 14:29:05,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:29:05,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:29:05,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:29:05,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:29:05,438 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:29:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:29:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-12-09 14:29:05,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:29:05,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:29:05,629 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:29:05,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:29:05,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:29:05,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:29:05,636 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 14:29:05,636 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 14:29:05,651 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 14:29:05,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:29:05,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:29:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-12-09 14:29:05,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:31:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-12-09 14:31:12,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:31:12,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-09 14:31:12,437 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:31:12,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-09 14:31:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-09 14:31:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=4294, Unknown=165, NotChecked=0, Total=5852 [2018-12-09 14:31:12,439 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 52 states. [2018-12-09 14:31:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:31:12,766 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2018-12-09 14:31:12,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-09 14:31:12,766 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-12-09 14:31:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:31:12,767 INFO L225 Difference]: With dead ends: 92 [2018-12-09 14:31:12,767 INFO L226 Difference]: Without dead ends: 91 [2018-12-09 14:31:12,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 126.9s TimeCoverageRelationStatistics Valid=2185, Invalid=5482, Unknown=165, NotChecked=0, Total=7832 [2018-12-09 14:31:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-09 14:31:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-12-09 14:31:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-09 14:31:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2018-12-09 14:31:12,775 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 127 [2018-12-09 14:31:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:31:12,776 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2018-12-09 14:31:12,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-09 14:31:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2018-12-09 14:31:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-12-09 14:31:12,776 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:31:12,776 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-12-09 14:31:12,776 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:31:12,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:31:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1680632873, now seen corresponding path program 13 times [2018-12-09 14:31:12,777 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:31:12,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:31:12,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:31:12,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:31:12,777 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:31:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:31:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-12-09 14:31:12,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:31:12,995 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:31:12,995 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:31:12,995 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:31:12,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:31:12,995 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:31:13,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:31:13,001 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:31:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:31:13,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:31:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-12-09 14:31:13,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:34:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-12-09 14:34:06,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:34:06,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-09 14:34:06,355 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:34:06,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-09 14:34:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-09 14:34:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1606, Invalid=5007, Unknown=193, NotChecked=0, Total=6806 [2018-12-09 14:34:06,356 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 56 states. [2018-12-09 14:34:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:34:06,683 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2018-12-09 14:34:06,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 14:34:06,684 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-12-09 14:34:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:34:06,684 INFO L225 Difference]: With dead ends: 98 [2018-12-09 14:34:06,684 INFO L226 Difference]: Without dead ends: 97 [2018-12-09 14:34:06,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 173.5s TimeCoverageRelationStatistics Valid=2529, Invalid=6398, Unknown=193, NotChecked=0, Total=9120 [2018-12-09 14:34:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-09 14:34:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-12-09 14:34:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-09 14:34:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2018-12-09 14:34:06,688 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 137 [2018-12-09 14:34:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:34:06,689 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2018-12-09 14:34:06,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-09 14:34:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2018-12-09 14:34:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-12-09 14:34:06,689 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:34:06,689 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-12-09 14:34:06,689 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 14:34:06,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:34:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1029166659, now seen corresponding path program 14 times [2018-12-09 14:34:06,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:34:06,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:34:06,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:34:06,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:34:06,690 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:34:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:34:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2018-12-09 14:34:06,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:34:06,937 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:34:06,937 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:34:06,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:34:06,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:34:06,937 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8551297f-43c4-418c-929d-9095cad40a9a/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:34:06,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:34:06,945 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:34:06,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-09 14:34:06,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:34:06,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:34:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2018-12-09 14:34:07,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:36:47,287 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-09 14:36:47,488 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:36:47,489 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:893) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 40 more [2018-12-09 14:36:47,494 INFO L168 Benchmark]: Toolchain (without parser) took 658496.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.5 MB). Free memory was 952.4 MB in the beginning and 950.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 217.9 MB. Max. memory is 11.5 GB. [2018-12-09 14:36:47,496 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 14:36:47,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 114.08 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 14:36:47,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.14 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 14:36:47,497 INFO L168 Benchmark]: Boogie Preprocessor took 11.43 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 14:36:47,497 INFO L168 Benchmark]: RCFGBuilder took 163.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -161.5 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2018-12-09 14:36:47,498 INFO L168 Benchmark]: TraceAbstraction took 658193.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 89.7 MB). Free memory was 1.1 GB in the beginning and 950.0 MB in the end (delta: 153.2 MB). Peak memory consumption was 242.8 MB. Max. memory is 11.5 GB. [2018-12-09 14:36:47,499 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 114.08 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.14 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.43 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 163.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -161.5 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 658193.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 89.7 MB). Free memory was 1.1 GB in the beginning and 950.0 MB in the end (delta: 153.2 MB). Peak memory consumption was 242.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...