./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2964994cdaa1e60b18f6e8e9960cc97625ea606 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:39:29,604 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:39:29,606 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:39:29,616 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:39:29,616 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:39:29,617 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:39:29,618 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:39:29,620 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:39:29,621 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:39:29,623 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:39:29,623 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:39:29,624 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:39:29,624 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:39:29,625 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:39:29,626 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:39:29,627 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:39:29,628 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:39:29,629 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:39:29,632 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:39:29,633 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:39:29,634 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:39:29,635 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:39:29,637 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:39:29,638 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:39:29,638 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:39:29,639 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:39:29,640 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:39:29,641 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:39:29,642 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:39:29,643 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:39:29,643 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:39:29,644 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:39:29,644 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:39:29,644 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:39:29,645 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:39:29,646 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:39:29,647 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 20:39:29,660 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:39:29,660 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:39:29,661 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:39:29,661 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 20:39:29,661 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 20:39:29,661 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 20:39:29,661 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 20:39:29,666 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 20:39:29,666 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 20:39:29,666 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 20:39:29,667 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 20:39:29,667 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:39:29,667 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:39:29,668 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:39:29,668 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:39:29,668 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:39:29,668 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:39:29,668 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:39:29,669 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:39:29,669 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:39:29,669 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:39:29,669 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:39:29,669 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:39:29,669 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:39:29,670 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:39:29,674 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:39:29,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:39:29,674 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:39:29,675 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:39:29,675 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:39:29,675 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 20:39:29,675 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:39:29,676 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:39:29,676 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:39:29,676 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_21293d68-855a-489b-9836-dc3e81ccdae7/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 ! call(__VERIFIER_error())) ) 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 -> f2964994cdaa1e60b18f6e8e9960cc97625ea606 [2018-10-26 20:39:29,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:39:29,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:39:29,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:39:29,735 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:39:29,736 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:39:29,737 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i [2018-10-26 20:39:29,789 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/data/771568ca3/c1ec6e6c5f14417b92b4fbff3a5662a9/FLAG1645a5450 [2018-10-26 20:39:30,138 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:39:30,139 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i [2018-10-26 20:39:30,144 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/data/771568ca3/c1ec6e6c5f14417b92b4fbff3a5662a9/FLAG1645a5450 [2018-10-26 20:39:30,155 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/data/771568ca3/c1ec6e6c5f14417b92b4fbff3a5662a9 [2018-10-26 20:39:30,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:39:30,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:39:30,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:39:30,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:39:30,163 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:39:30,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59845b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30, skipping insertion in model container [2018-10-26 20:39:30,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:39:30,190 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:39:30,316 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:39:30,319 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:39:30,334 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:39:30,347 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:39:30,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30 WrapperNode [2018-10-26 20:39:30,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:39:30,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:39:30,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:39:30,349 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:39:30,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:39:30,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:39:30,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:39:30,365 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:39:30,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... [2018-10-26 20:39:30,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:39:30,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:39:30,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:39:30,382 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:39:30,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/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 [2018-10-26 20:39:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:39:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:39:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:39:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:39:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:39:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:39:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 20:39:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 20:39:30,825 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:39:30,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:39:30 BoogieIcfgContainer [2018-10-26 20:39:30,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:39:30,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:39:30,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:39:30,833 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:39:30,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:39:30" (1/3) ... [2018-10-26 20:39:30,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5189ce4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:39:30, skipping insertion in model container [2018-10-26 20:39:30,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:39:30" (2/3) ... [2018-10-26 20:39:30,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5189ce4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:39:30, skipping insertion in model container [2018-10-26 20:39:30,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:39:30" (3/3) ... [2018-10-26 20:39:30,837 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02_false-unreach-call_true-no-overflow.i [2018-10-26 20:39:30,849 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:39:30,858 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:39:30,878 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:39:30,922 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:39:30,922 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:39:30,923 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:39:30,923 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:39:30,923 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:39:30,923 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:39:30,923 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:39:30,924 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:39:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 20:39:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 20:39:30,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:39:30,957 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:39:30,960 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:39:30,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:39:30,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1870586046, now seen corresponding path program 1 times [2018-10-26 20:39:30,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:39:31,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:31,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:31,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:31,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:39:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:39:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:31,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:39:31,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 20:39:31,083 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 20:39:31,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 20:39:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 20:39:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 20:39:31,106 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 20:39:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:39:31,131 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-26 20:39:31,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 20:39:31,133 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 20:39:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:39:31,141 INFO L225 Difference]: With dead ends: 30 [2018-10-26 20:39:31,141 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 20:39:31,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 20:39:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 20:39:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 20:39:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 20:39:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 20:39:31,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-26 20:39:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:39:31,178 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 20:39:31,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 20:39:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 20:39:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 20:39:31,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:39:31,179 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:39:31,179 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:39:31,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:39:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1861068280, now seen corresponding path program 1 times [2018-10-26 20:39:31,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:39:31,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:31,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:31,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:31,181 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:39:31,190 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-26 20:39:31,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-26 20:39:31,191 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-26 20:39:31,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:31,201 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-26 20:39:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:39:31,244 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-10-26 20:39:31,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 20:39:31,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:39:31,245 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/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 [2018-10-26 20:39:31,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:31,253 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 20:39:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:39:31,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:39:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:31,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:39:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:31,451 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:39:31,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-10-26 20:39:31,451 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 20:39:31,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:39:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:39:31,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:39:31,453 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-10-26 20:39:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:39:31,483 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-26 20:39:31,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:39:31,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 20:39:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:39:31,485 INFO L225 Difference]: With dead ends: 21 [2018-10-26 20:39:31,485 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 20:39:31,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:39:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 20:39:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-26 20:39:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 20:39:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 20:39:31,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-10-26 20:39:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:39:31,491 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 20:39:31,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:39:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 20:39:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 20:39:31,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:39:31,492 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:39:31,493 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:39:31,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:39:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash 996352094, now seen corresponding path program 1 times [2018-10-26 20:39:31,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:39:31,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:31,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:31,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:31,495 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:39:31,506 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-26 20:39:31,506 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-26 20:39:31,506 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-26 20:39:31,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:31,535 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-26 20:39:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:39:31,574 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-10-26 20:39:31,576 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [21], [24], [26], [32], [33], [34], [36] [2018-10-26 20:39:31,629 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 20:39:31,629 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 20:39:31,736 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 20:39:32,184 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 20:39:32,188 INFO L272 AbstractInterpreter]: Visited 13 different actions 74 times. Merged at 4 different actions 31 times. Widened at 1 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-26 20:39:32,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:39:32,238 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 20:39:32,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:39:32,239 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 20:39:32,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:32,253 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:39:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:39:32,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:39:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:32,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:39:37,095 WARN L179 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 46 DAG size of output: 18 [2018-10-26 20:39:39,201 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2018-10-26 20:39:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:39,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:39:39,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-10-26 20:39:39,247 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 20:39:39,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 20:39:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 20:39:39,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-26 20:39:39,248 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2018-10-26 20:39:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:39:39,423 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-26 20:39:39,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 20:39:39,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2018-10-26 20:39:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:39:39,424 INFO L225 Difference]: With dead ends: 23 [2018-10-26 20:39:39,424 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 20:39:39,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-26 20:39:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 20:39:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 20:39:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 20:39:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 20:39:39,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-10-26 20:39:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:39:39,429 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 20:39:39,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 20:39:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 20:39:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 20:39:39,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:39:39,431 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:39:39,431 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:39:39,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:39:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1450296376, now seen corresponding path program 2 times [2018-10-26 20:39:39,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:39:39,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:39,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:39:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:39:39,433 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:39:39,443 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-26 20:39:39,443 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-26 20:39:39,443 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-26 20:39:39,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:39:39,452 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-26 20:39:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:39:39,486 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 20:39:39,486 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 20:39:39,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:39:39,486 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/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 [2018-10-26 20:39:39,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:39:39,494 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 20:39:39,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 20:39:39,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:39:39,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:39:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:39,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:39:44,544 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-26 20:39:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:39:46,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:39:46,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2018-10-26 20:39:46,841 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 20:39:46,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 20:39:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 20:39:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=213, Unknown=4, NotChecked=0, Total=272 [2018-10-26 20:39:46,842 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-26 20:40:21,943 WARN L179 SmtUtils]: Spent 25.64 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2018-10-26 20:40:42,339 WARN L179 SmtUtils]: Spent 10.29 s on a formula simplification that was a NOOP. DAG size: 31 [2018-10-26 20:40:59,109 WARN L179 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 30 [2018-10-26 20:41:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:41:01,826 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-26 20:41:01,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 20:41:01,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-26 20:41:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:41:01,828 INFO L225 Difference]: With dead ends: 34 [2018-10-26 20:41:01,828 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 20:41:01,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=106, Invalid=383, Unknown=17, NotChecked=0, Total=506 [2018-10-26 20:41:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 20:41:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-26 20:41:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-26 20:41:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-26 20:41:01,834 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2018-10-26 20:41:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:41:01,834 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-26 20:41:01,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 20:41:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-26 20:41:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 20:41:01,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:41:01,836 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:41:01,836 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:41:01,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:41:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -38190114, now seen corresponding path program 3 times [2018-10-26 20:41:01,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:41:01,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:41:01,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:41:01,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:41:01,838 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:41:01,852 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-26 20:41:01,852 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-26 20:41:01,852 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-26 20:41:01,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:41:01,867 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-26 20:41:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:41:01,959 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 20:41:01,959 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 20:41:01,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:41:01,959 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/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 [2018-10-26 20:41:01,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:41:01,970 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 20:41:02,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:41:02,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:41:02,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:41:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:41:02,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:41:32,036 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 28 [2018-10-26 20:41:40,179 WARN L179 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-26 20:42:03,181 WARN L179 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 30 [2018-10-26 20:42:51,240 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-10-26 20:42:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:42:51,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:42:51,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2018-10-26 20:42:51,286 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 20:42:51,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 20:42:51,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 20:42:51,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=641, Unknown=50, NotChecked=0, Total=812 [2018-10-26 20:42:51,288 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 29 states. [2018-10-26 20:42:55,724 WARN L179 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2018-10-26 20:43:06,632 WARN L179 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-10-26 20:43:10,783 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 26 DAG size of output: 13 [2018-10-26 20:43:21,046 WARN L179 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-10-26 20:43:29,794 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_main_~sn~0 4294967296))) (let ((.cse0 (mod c_main_~n~0 4294967296)) (.cse1 (= 0 .cse7)) (.cse2 (= (mod (div (mod (* c_main_~n~0 (+ c_main_~n~0 1)) 4294967296) 2) 4294967296) .cse7))) (and (or (<= (mod (+ c_main_~i~0 1) 4294967296) .cse0) .cse1 .cse2) (or (= 0 (mod (+ c_main_~i~0 c_main_~sn~0 1) 4294967296)) (forall ((main_~n~0 Int)) (let ((.cse3 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 2) 4294967296) .cse3) (< .cse3 (mod (+ c_main_~i~0 1) 4294967296)) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ c_main_~i~0 c_main_~sn~0 1) 4294967296)))))) (or (<= (mod c_main_~i~0 4294967296) .cse0) .cse1 .cse2) (or (= (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 6) 4294967296) 0) (forall ((main_~n~0 Int)) (let ((.cse4 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 4) 4294967296) .cse4) (< .cse4 (mod (+ c_main_~i~0 3) 4294967296)) (= (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 6) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296)))))) (or (forall ((main_~n~0 Int)) (let ((.cse5 (mod main_~n~0 4294967296))) (or (< .cse5 (mod (+ c_main_~i~0 2) 4294967296)) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 3) 4294967296)) (<= (mod (+ c_main_~i~0 3) 4294967296) .cse5)))) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 3) 4294967296) 0)) (or (= (mod (+ (* 4 c_main_~i~0) c_main_~sn~0 10) 4294967296) 0) (forall ((main_~n~0 Int)) (let ((.cse6 (mod main_~n~0 4294967296))) (or (= (mod (+ (* 4 c_main_~i~0) c_main_~sn~0 10) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296)) (<= (mod (+ c_main_~i~0 5) 4294967296) .cse6) (< .cse6 (mod (+ c_main_~i~0 4) 4294967296))))))))) is different from false [2018-10-26 20:43:31,847 WARN L832 $PredicateComparison]: unable to prove that (and (or (= (mod (+ c_main_~i~0 c_main_~sn~0) 4294967296) 0) (forall ((main_~n~0 Int)) (let ((.cse0 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 1) 4294967296) .cse0) (< .cse0 (mod c_main_~i~0 4294967296)) (= (mod (+ c_main_~i~0 c_main_~sn~0) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296)))))) (or (= 0 (mod (+ (* 4 c_main_~i~0) c_main_~sn~0 6) 4294967296)) (forall ((main_~n~0 Int)) (let ((.cse1 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 4) 4294967296) .cse1) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ (* 4 c_main_~i~0) c_main_~sn~0 6) 4294967296)) (< .cse1 (mod (+ c_main_~i~0 3) 4294967296)))))) (or (forall ((main_~n~0 Int)) (let ((.cse2 (mod main_~n~0 4294967296))) (or (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 3) 4294967296)) (< .cse2 (mod (+ c_main_~i~0 2) 4294967296)) (<= (mod (+ c_main_~i~0 3) 4294967296) .cse2)))) (= 0 (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 3) 4294967296))) (let ((.cse3 (mod c_main_~sn~0 4294967296))) (or (<= (mod c_main_~i~0 4294967296) (mod c_main_~n~0 4294967296)) (= 0 .cse3) (= (mod (div (mod (* c_main_~n~0 (+ c_main_~n~0 1)) 4294967296) 2) 4294967296) .cse3))) (or (forall ((main_~n~0 Int)) (let ((.cse4 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 2) 4294967296) .cse4) (< .cse4 (mod (+ c_main_~i~0 1) 4294967296)) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 1) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296))))) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 1) 4294967296) 0))) is different from false [2018-10-26 20:43:37,279 WARN L832 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod c_main_~sn~0 4294967296))) (or (<= (mod (+ c_main_~i~0 1) 4294967296) (mod c_main_~n~0 4294967296)) (= 0 .cse0) (= (mod (div (mod (* c_main_~n~0 (+ c_main_~n~0 1)) 4294967296) 2) 4294967296) .cse0))) (or (= 0 (mod (+ c_main_~i~0 c_main_~sn~0 1) 4294967296)) (forall ((main_~n~0 Int)) (let ((.cse1 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 2) 4294967296) .cse1) (< .cse1 (mod (+ c_main_~i~0 1) 4294967296)) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ c_main_~i~0 c_main_~sn~0 1) 4294967296)))))) (or (= (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 6) 4294967296) 0) (forall ((main_~n~0 Int)) (let ((.cse2 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 4) 4294967296) .cse2) (< .cse2 (mod (+ c_main_~i~0 3) 4294967296)) (= (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 6) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296)))))) (or (forall ((main_~n~0 Int)) (let ((.cse3 (mod main_~n~0 4294967296))) (or (< .cse3 (mod (+ c_main_~i~0 2) 4294967296)) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 3) 4294967296)) (<= (mod (+ c_main_~i~0 3) 4294967296) .cse3)))) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 3) 4294967296) 0))) is different from false [2018-10-26 20:43:39,297 WARN L832 $PredicateComparison]: unable to prove that (and (or (= (mod (+ c_main_~i~0 c_main_~sn~0) 4294967296) 0) (forall ((main_~n~0 Int)) (let ((.cse0 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 1) 4294967296) .cse0) (< .cse0 (mod c_main_~i~0 4294967296)) (= (mod (+ c_main_~i~0 c_main_~sn~0) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296)))))) (or (forall ((main_~n~0 Int)) (let ((.cse1 (mod main_~n~0 4294967296))) (or (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 3) 4294967296)) (< .cse1 (mod (+ c_main_~i~0 2) 4294967296)) (<= (mod (+ c_main_~i~0 3) 4294967296) .cse1)))) (= 0 (mod (+ (* 3 c_main_~i~0) c_main_~sn~0 3) 4294967296))) (let ((.cse2 (mod c_main_~sn~0 4294967296))) (or (<= (mod c_main_~i~0 4294967296) (mod c_main_~n~0 4294967296)) (= 0 .cse2) (= (mod (div (mod (* c_main_~n~0 (+ c_main_~n~0 1)) 4294967296) 2) 4294967296) .cse2))) (or (forall ((main_~n~0 Int)) (let ((.cse3 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 2) 4294967296) .cse3) (< .cse3 (mod (+ c_main_~i~0 1) 4294967296)) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 1) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296))))) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 1) 4294967296) 0))) is different from false [2018-10-26 20:43:41,318 WARN L832 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod c_main_~sn~0 4294967296))) (or (<= (mod (+ c_main_~i~0 1) 4294967296) (mod c_main_~n~0 4294967296)) (= 0 .cse0) (= (mod (div (mod (* c_main_~n~0 (+ c_main_~n~0 1)) 4294967296) 2) 4294967296) .cse0))) (or (= 0 (mod (+ c_main_~i~0 c_main_~sn~0 1) 4294967296)) (forall ((main_~n~0 Int)) (let ((.cse1 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 2) 4294967296) .cse1) (< .cse1 (mod (+ c_main_~i~0 1) 4294967296)) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ c_main_~i~0 c_main_~sn~0 1) 4294967296)))))) (or (forall ((main_~n~0 Int)) (let ((.cse2 (mod main_~n~0 4294967296))) (or (< .cse2 (mod (+ c_main_~i~0 2) 4294967296)) (= (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296) (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 3) 4294967296)) (<= (mod (+ c_main_~i~0 3) 4294967296) .cse2)))) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 3) 4294967296) 0))) is different from false [2018-10-26 20:44:52,078 WARN L179 SmtUtils]: Spent 34.88 s on a formula simplification that was a NOOP. DAG size: 43 [2018-10-26 20:45:06,150 WARN L832 $PredicateComparison]: unable to prove that (and (or (= (mod (+ c_main_~i~0 c_main_~sn~0) 4294967296) 0) (forall ((main_~n~0 Int)) (let ((.cse0 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 1) 4294967296) .cse0) (< .cse0 (mod c_main_~i~0 4294967296)) (= (mod (+ c_main_~i~0 c_main_~sn~0) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296)))))) (or (forall ((main_~n~0 Int)) (let ((.cse1 (mod main_~n~0 4294967296))) (or (<= (mod (+ c_main_~i~0 2) 4294967296) .cse1) (< .cse1 (mod (+ c_main_~i~0 1) 4294967296)) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 1) 4294967296) (mod (div (mod (* main_~n~0 (+ main_~n~0 1)) 4294967296) 2) 4294967296))))) (= (mod (+ (* 2 c_main_~i~0) c_main_~sn~0 1) 4294967296) 0)) (let ((.cse2 (mod c_main_~sn~0 4294967296))) (or (= 0 .cse2) (= (mod (div (mod (* c_main_~n~0 (+ c_main_~n~0 1)) 4294967296) 2) 4294967296) .cse2)))) is different from false [2018-10-26 20:45:50,862 WARN L179 SmtUtils]: Spent 23.99 s on a formula simplification that was a NOOP. DAG size: 35 [2018-10-26 20:46:18,683 WARN L179 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-26 20:46:59,335 WARN L179 SmtUtils]: Spent 10.39 s on a formula simplification that was a NOOP. DAG size: 30 [2018-10-26 20:47:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:47:15,420 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-10-26 20:47:15,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 20:47:15,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 26 [2018-10-26 20:47:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:47:15,421 INFO L225 Difference]: With dead ends: 55 [2018-10-26 20:47:15,421 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 20:47:15,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 312.3s TimeCoverageRelationStatistics Valid=269, Invalid=1452, Unknown=109, NotChecked=522, Total=2352 [2018-10-26 20:47:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 20:47:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 20:47:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 20:47:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-26 20:47:15,429 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 26 [2018-10-26 20:47:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:47:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-26 20:47:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 20:47:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-26 20:47:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 20:47:15,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:47:15,430 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:47:15,431 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:47:15,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:47:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1402020126, now seen corresponding path program 4 times [2018-10-26 20:47:15,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:47:15,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:47:15,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:47:15,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:47:15,432 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:47:15,451 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-26 20:47:15,451 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-26 20:47:15,451 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21293d68-855a-489b-9836-dc3e81ccdae7/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-26 20:47:15,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:47:15,459 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-26 20:47:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-10-26 20:47:17,502 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-10-26 20:47:17,502 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:47:17,517 WARN L208 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-10-26 20:47:17,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:47:17 BoogieIcfgContainer [2018-10-26 20:47:17,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:47:17,519 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:47:17,519 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:47:17,519 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:47:17,519 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:39:30" (3/4) ... [2018-10-26 20:47:17,524 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 20:47:17,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:47:17,525 INFO L168 Benchmark]: Toolchain (without parser) took 467367.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 953.1 MB in the beginning and 886.2 MB in the end (delta: 66.9 MB). Peak memory consumption was 202.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:47:17,525 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:47:17,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.99 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:47:17,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.80 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:47:17,526 INFO L168 Benchmark]: Boogie Preprocessor took 16.38 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:47:17,527 INFO L168 Benchmark]: RCFGBuilder took 445.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-10-26 20:47:17,527 INFO L168 Benchmark]: TraceAbstraction took 466689.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 889.5 MB in the end (delta: 231.0 MB). Peak memory consumption was 231.0 MB. Max. memory is 11.5 GB. [2018-10-26 20:47:17,528 INFO L168 Benchmark]: Witness Printer took 5.32 ms. Allocated memory is still 1.2 GB. Free memory was 889.5 MB in the beginning and 886.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-10-26 20:47:17,533 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 189.99 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.4 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 15.80 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.38 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 445.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 466689.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 889.5 MB in the end (delta: 231.0 MB). Peak memory consumption was 231.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.32 ms. Allocated memory is still 1.2 GB. Free memory was 889.5 MB in the beginning and 886.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L11] unsigned int i, n=__VERIFIER_nondet_uint(), sn=0; [L11] unsigned int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] i=0 [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND FALSE !(i<=n) [L15] CALL __VERIFIER_assert(sn==(n*(n+1))/2 || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNKNOWN Result, 466.6s OverallTime, 6 OverallIterations, 12 TraceHistogramMax, 339.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 28 SDslu, 370 SDs, 0 SdLazy, 330 SolverSat, 54 SolverUnsat, 38 SolverUnknown, 0 SolverNotchecked, 71.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 390.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 123.4s InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 137 ConstructedInterpolants, 27 QuantifiedInterpolants, 35584 SizeOfPredicates, 16 NumberOfNonLiveVariables, 156 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 0/98 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...