./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 64bit --witnessprinter.graph.data.programhash dd635190a9aa277670265f46b90ecce0c321a2a9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 21:50:46,857 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 21:50:46,859 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 21:50:46,866 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 21:50:46,866 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 21:50:46,867 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 21:50:46,867 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 21:50:46,868 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 21:50:46,870 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 21:50:46,870 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 21:50:46,871 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 21:50:46,871 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 21:50:46,872 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 21:50:46,872 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 21:50:46,873 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 21:50:46,873 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 21:50:46,874 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 21:50:46,875 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 21:50:46,877 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 21:50:46,878 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 21:50:46,878 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 21:50:46,879 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 21:50:46,881 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 21:50:46,881 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 21:50:46,881 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 21:50:46,882 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 21:50:46,883 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 21:50:46,883 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 21:50:46,884 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 21:50:46,884 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 21:50:46,885 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 21:50:46,885 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 21:50:46,885 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 21:50:46,885 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 21:50:46,886 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 21:50:46,886 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 21:50:46,887 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-22 21:50:46,896 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 21:50:46,896 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 21:50:46,897 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 21:50:46,897 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 21:50:46,897 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-22 21:50:46,897 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-22 21:50:46,897 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-22 21:50:46,897 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-22 21:50:46,897 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-22 21:50:46,897 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-22 21:50:46,898 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-22 21:50:46,898 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-22 21:50:46,898 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-22 21:50:46,898 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 21:50:46,898 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-22 21:50:46,899 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 21:50:46,900 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 21:50:46,900 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 21:50:46,900 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 21:50:46,900 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 21:50:46,900 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 21:50:46,900 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 21:50:46,900 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 21:50:46,900 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 21:50:46,901 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 21:50:46,901 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 21:50:46,901 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-22 21:50:46,901 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 21:50:46,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 21:50:46,901 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-22 21:50:46,901 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_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd635190a9aa277670265f46b90ecce0c321a2a9 [2018-11-22 21:50:46,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 21:50:46,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 21:50:46,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 21:50:46,939 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 21:50:46,939 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 21:50:46,940 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/../../sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c [2018-11-22 21:50:46,975 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/data/ef817306b/cf1dd8a16f1d4c2aa77c468fc544940a/FLAG5855e468a [2018-11-22 21:50:47,371 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 21:50:47,371 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c [2018-11-22 21:50:47,375 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/data/ef817306b/cf1dd8a16f1d4c2aa77c468fc544940a/FLAG5855e468a [2018-11-22 21:50:47,383 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/data/ef817306b/cf1dd8a16f1d4c2aa77c468fc544940a [2018-11-22 21:50:47,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 21:50:47,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 21:50:47,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 21:50:47,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 21:50:47,389 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 21:50:47,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f711c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47, skipping insertion in model container [2018-11-22 21:50:47,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 21:50:47,411 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 21:50:47,512 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 21:50:47,514 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 21:50:47,523 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 21:50:47,531 INFO L195 MainTranslator]: Completed translation [2018-11-22 21:50:47,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47 WrapperNode [2018-11-22 21:50:47,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 21:50:47,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 21:50:47,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 21:50:47,532 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 21:50:47,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 21:50:47,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 21:50:47,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 21:50:47,545 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 21:50:47,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... [2018-11-22 21:50:47,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 21:50:47,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 21:50:47,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 21:50:47,558 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 21:50:47,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:50:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2018-11-22 21:50:47,642 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2018-11-22 21:50:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 21:50:47,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 21:50:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 21:50:47,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 21:50:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 21:50:47,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 21:50:47,807 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 21:50:47,807 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 21:50:47,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:50:47 BoogieIcfgContainer [2018-11-22 21:50:47,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 21:50:47,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 21:50:47,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 21:50:47,810 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 21:50:47,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:50:47" (1/3) ... [2018-11-22 21:50:47,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc67f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:50:47, skipping insertion in model container [2018-11-22 21:50:47,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:47" (2/3) ... [2018-11-22 21:50:47,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc67f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:50:47, skipping insertion in model container [2018-11-22 21:50:47,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:50:47" (3/3) ... [2018-11-22 21:50:47,813 INFO L112 eAbstractionObserver]: Analyzing ICFG TwoWay_true-termination_true-no-overflow.c [2018-11-22 21:50:47,822 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 21:50:47,832 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-22 21:50:47,844 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-22 21:50:47,870 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 21:50:47,871 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 21:50:47,871 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 21:50:47,871 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 21:50:47,871 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 21:50:47,871 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 21:50:47,871 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 21:50:47,871 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 21:50:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-11-22 21:50:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-22 21:50:47,893 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:50:47,894 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:50:47,896 INFO L423 AbstractCegarLoop]: === Iteration 1 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:50:47,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:47,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1810771843, now seen corresponding path program 1 times [2018-11-22 21:50:47,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:50:47,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:47,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:47,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:47,941 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:50:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:48,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 21:50:48,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-22 21:50:48,058 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 21:50:48,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-22 21:50:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 21:50:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-22 21:50:48,075 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 7 states. [2018-11-22 21:50:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:50:48,245 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2018-11-22 21:50:48,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 21:50:48,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-11-22 21:50:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:50:48,256 INFO L225 Difference]: With dead ends: 61 [2018-11-22 21:50:48,256 INFO L226 Difference]: Without dead ends: 55 [2018-11-22 21:50:48,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-22 21:50:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-22 21:50:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2018-11-22 21:50:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-22 21:50:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2018-11-22 21:50:48,297 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 12 [2018-11-22 21:50:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:50:48,297 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2018-11-22 21:50:48,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-22 21:50:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2018-11-22 21:50:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-22 21:50:48,298 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:50:48,298 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:50:48,298 INFO L423 AbstractCegarLoop]: === Iteration 2 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:50:48,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1810772035, now seen corresponding path program 1 times [2018-11-22 21:50:48,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:50:48,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:48,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:48,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:48,300 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:50:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:48,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 21:50:48,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-22 21:50:48,329 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 21:50:48,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-22 21:50:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-22 21:50:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-22 21:50:48,332 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 4 states. [2018-11-22 21:50:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:50:48,348 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2018-11-22 21:50:48,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-22 21:50:48,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-11-22 21:50:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:50:48,349 INFO L225 Difference]: With dead ends: 49 [2018-11-22 21:50:48,349 INFO L226 Difference]: Without dead ends: 22 [2018-11-22 21:50:48,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-22 21:50:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-22 21:50:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-22 21:50:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-22 21:50:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-22 21:50:48,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2018-11-22 21:50:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:50:48,355 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-22 21:50:48,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-22 21:50:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-22 21:50:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-22 21:50:48,355 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:50:48,356 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:50:48,356 INFO L423 AbstractCegarLoop]: === Iteration 3 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:50:48,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 299352326, now seen corresponding path program 1 times [2018-11-22 21:50:48,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:50:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:48,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:48,357 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:50:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:48,379 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 21:50:48,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-22 21:50:48,379 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 21:50:48,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-22 21:50:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-22 21:50:48,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-22 21:50:48,380 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2018-11-22 21:50:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:50:48,401 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2018-11-22 21:50:48,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-22 21:50:48,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-11-22 21:50:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:50:48,402 INFO L225 Difference]: With dead ends: 22 [2018-11-22 21:50:48,402 INFO L226 Difference]: Without dead ends: 21 [2018-11-22 21:50:48,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-22 21:50:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-22 21:50:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-22 21:50:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-22 21:50:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-22 21:50:48,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2018-11-22 21:50:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:50:48,406 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-22 21:50:48,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-22 21:50:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-22 21:50:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-22 21:50:48,406 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:50:48,406 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:50:48,407 INFO L423 AbstractCegarLoop]: === Iteration 4 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:50:48,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash -968795783, now seen corresponding path program 1 times [2018-11-22 21:50:48,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:50:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:48,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:48,408 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:50:48,416 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-22 21:50:48,416 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-22 21:50:48,416 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-22 21:50:48,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:48,432 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-22 21:50:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:48,463 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-11-22 21:50:48,464 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [21], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-11-22 21:50:48,485 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 21:50:48,485 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 21:50:48,596 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 21:50:48,597 INFO L272 AbstractInterpreter]: Visited 19 different actions 49 times. Never merged. Never widened. Performed 154 root evaluator evaluations with a maximum evaluation depth of 3. Performed 154 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-11-22 21:50:48,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:48,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 21:50:48,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:50:48,601 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:50:48,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:48,607 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 21:50:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:48,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:50:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:48,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 21:50:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:48,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:50:48,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-22 21:50:48,865 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 21:50:48,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 21:50:48,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 21:50:48,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-22 21:50:48,866 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2018-11-22 21:50:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:50:49,007 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-22 21:50:49,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 21:50:49,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-11-22 21:50:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:50:49,008 INFO L225 Difference]: With dead ends: 28 [2018-11-22 21:50:49,008 INFO L226 Difference]: Without dead ends: 27 [2018-11-22 21:50:49,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2018-11-22 21:50:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-22 21:50:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2018-11-22 21:50:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-22 21:50:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-22 21:50:49,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-11-22 21:50:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:50:49,011 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-22 21:50:49,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 21:50:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-22 21:50:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-22 21:50:49,012 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:50:49,012 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:50:49,012 INFO L423 AbstractCegarLoop]: === Iteration 5 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:50:49,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash 32101853, now seen corresponding path program 1 times [2018-11-22 21:50:49,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:50:49,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:49,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:49,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:49,013 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:50:49,018 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-22 21:50:49,018 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-22 21:50:49,018 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:50:49,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:49,026 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-22 21:50:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:49,043 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-11-22 21:50:49,044 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [22], [23], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-11-22 21:50:49,045 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 21:50:49,045 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 21:50:49,085 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 21:50:49,085 INFO L272 AbstractInterpreter]: Visited 20 different actions 52 times. Never merged. Never widened. Performed 160 root evaluator evaluations with a maximum evaluation depth of 3. Performed 160 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-11-22 21:50:49,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:49,087 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 21:50:49,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:50:49,087 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:50:49,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:49,094 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 21:50:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:49,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:50:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:49,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 21:50:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:50:49,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:50:49,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-11-22 21:50:49,286 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 21:50:49,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 21:50:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 21:50:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-11-22 21:50:49,287 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 18 states. [2018-11-22 21:50:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:50:49,485 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-11-22 21:50:49,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 21:50:49,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-11-22 21:50:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:50:49,487 INFO L225 Difference]: With dead ends: 45 [2018-11-22 21:50:49,487 INFO L226 Difference]: Without dead ends: 37 [2018-11-22 21:50:49,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2018-11-22 21:50:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-22 21:50:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-22 21:50:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-22 21:50:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-11-22 21:50:49,493 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2018-11-22 21:50:49,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:50:49,493 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-11-22 21:50:49,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 21:50:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-11-22 21:50:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-22 21:50:49,494 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:50:49,494 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:50:49,495 INFO L423 AbstractCegarLoop]: === Iteration 6 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:50:49,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:49,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1082241716, now seen corresponding path program 1 times [2018-11-22 21:50:49,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:50:49,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:49,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:49,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:50:49,496 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:50:49,503 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-22 21:50:49,503 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-22 21:50:49,504 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:50:49,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:49,518 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-22 21:50:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:49,538 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-11-22 21:50:49,539 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [21], [22], [24], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-11-22 21:50:49,540 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 21:50:49,540 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 21:50:49,596 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 21:50:49,596 INFO L272 AbstractInterpreter]: Visited 21 different actions 68 times. Merged at 6 different actions 14 times. Never widened. Performed 228 root evaluator evaluations with a maximum evaluation depth of 3. Performed 228 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 3 fixpoints after 2 different actions. Largest state had 8 variables. [2018-11-22 21:50:49,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:50:49,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 21:50:49,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:50:49,602 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:50:49,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:50:49,608 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 21:50:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:50:49,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:50:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-22 21:50:49,691 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 21:50:57,944 WARN L180 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2018-11-22 21:51:04,813 WARN L180 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2018-11-22 21:51:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-22 21:51:04,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:51:04,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-11-22 21:51:04,996 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 21:51:04,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 21:51:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 21:51:04,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=310, Unknown=4, NotChecked=0, Total=380 [2018-11-22 21:51:04,997 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 20 states. [2018-11-22 21:51:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:51:06,636 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2018-11-22 21:51:06,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 21:51:06,636 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2018-11-22 21:51:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:51:06,637 INFO L225 Difference]: With dead ends: 51 [2018-11-22 21:51:06,637 INFO L226 Difference]: Without dead ends: 50 [2018-11-22 21:51:06,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=229, Invalid=755, Unknown=8, NotChecked=0, Total=992 [2018-11-22 21:51:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-22 21:51:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2018-11-22 21:51:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-22 21:51:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2018-11-22 21:51:06,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2018-11-22 21:51:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:51:06,641 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2018-11-22 21:51:06,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 21:51:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2018-11-22 21:51:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-22 21:51:06,642 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:51:06,642 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:51:06,642 INFO L423 AbstractCegarLoop]: === Iteration 7 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:51:06,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:51:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash 810245226, now seen corresponding path program 1 times [2018-11-22 21:51:06,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:51:06,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:51:06,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:51:06,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:51:06,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:51:06,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-22 21:51:06,650 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-22 21:51:06,650 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:51:06,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:51:06,656 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-22 21:51:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:51:06,678 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-11-22 21:51:06,678 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [22], [23], [24], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-11-22 21:51:06,679 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 21:51:06,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 21:51:06,715 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 21:51:06,716 INFO L272 AbstractInterpreter]: Visited 21 different actions 68 times. Merged at 6 different actions 14 times. Never widened. Performed 228 root evaluator evaluations with a maximum evaluation depth of 3. Performed 228 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 3 fixpoints after 2 different actions. Largest state had 8 variables. [2018-11-22 21:51:06,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:51:06,717 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 21:51:06,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:51:06,718 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:51:06,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:51:06,724 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 21:51:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:51:06,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:51:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 21:51:06,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 21:51:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 21:51:07,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:51:07,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-11-22 21:51:07,273 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 21:51:07,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-22 21:51:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-22 21:51:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2018-11-22 21:51:07,274 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 27 states. [2018-11-22 21:51:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:51:07,552 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-11-22 21:51:07,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 21:51:07,552 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2018-11-22 21:51:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:51:07,553 INFO L225 Difference]: With dead ends: 50 [2018-11-22 21:51:07,553 INFO L226 Difference]: Without dead ends: 46 [2018-11-22 21:51:07,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 21:51:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-22 21:51:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-22 21:51:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-22 21:51:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-11-22 21:51:07,558 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 32 [2018-11-22 21:51:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:51:07,558 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-11-22 21:51:07,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-22 21:51:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-11-22 21:51:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-22 21:51:07,559 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:51:07,560 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:51:07,560 INFO L423 AbstractCegarLoop]: === Iteration 8 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 21:51:07,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:51:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -122263405, now seen corresponding path program 2 times [2018-11-22 21:51:07,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 21:51:07,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:51:07,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:51:07,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:51:07,561 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 21:51:07,568 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-22 21:51:07,569 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-22 21:51:07,569 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:51:07,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:51:07,578 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-22 21:51:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:51:07,597 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 21:51:07,598 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 21:51:07,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:51:07,598 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/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 [2018-11-22 21:51:07,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 21:51:07,603 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 21:51:07,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 21:51:07,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:51:07,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:51:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-22 21:51:07,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 21:51:18,461 WARN L180 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 35 [2018-11-22 21:51:18,463 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-11-22 21:51:26,064 WARN L180 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 34 [2018-11-22 21:51:26,067 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-11-22 21:51:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 1 refuted. 1 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-22 21:51:26,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:51:26,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2018-11-22 21:51:26,199 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 21:51:26,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 21:51:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 21:51:26,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=492, Unknown=12, NotChecked=0, Total=600 [2018-11-22 21:51:26,200 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 25 states. [2018-11-22 21:51:34,699 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_twoWay_#res| 1))) (and (= c_twoWay_~n |c_twoWay_#in~n|) (= |c_twoWay_#in~n| (+ c_twoWay_~m~0 1)) (forall ((v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_9 Int)) (or (>= (* (* (* v_prenex_9 |c_twoWay_#res|) v_prenex_10) v_prenex_11) (- 2147483648)) (< |c_twoWay_#in~n| v_prenex_9) (<= (+ v_prenex_9 1) 0))) (<= 0 |c_twoWay_#in~n|) (forall ((v_twoWay_~m~0_BEFORE_CALL_14 Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int) (v_prenex_8 Int)) (or (>= (* v_prenex_8 (* (* v_twoWay_~m~0_BEFORE_CALL_14 |c_twoWay_#res|) |v_twoWay_#in~n_BEFORE_CALL_4|)) (- 2147483648)) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_14) (exists ((v_subst_1 Int)) (not (>= (* (* v_twoWay_~m~0_BEFORE_CALL_14 |v_twoWay_#in~n_BEFORE_CALL_4|) v_subst_1) (- 2147483648)))))) (= .cse0 |c_twoWay_#in~n|) (<= .cse0 0))) is different from false [2018-11-22 21:51:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:51:38,278 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-11-22 21:51:38,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 21:51:38,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2018-11-22 21:51:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:51:38,279 INFO L225 Difference]: With dead ends: 46 [2018-11-22 21:51:38,279 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 21:51:38,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=205, Invalid=907, Unknown=14, NotChecked=64, Total=1190 [2018-11-22 21:51:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 21:51:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 21:51:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 21:51:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 21:51:38,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2018-11-22 21:51:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:51:38,280 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:51:38,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 21:51:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 21:51:38,280 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 21:51:38,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 21:51:38,361 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L444 ceAbstractionStarter]: At program point L31-2(lines 31 35) the Hoare annotation is: (let ((.cse0 (< 2147483647 |twoWay_#in~n|)) (.cse1 (< |twoWay_#in~terminate| 1))) (and (or .cse0 (and (<= |twoWay_#in~n| twoWay_~n) (<= 1 twoWay_~terminate) (= |twoWay_#in~n| (+ twoWay_~m~0 1))) .cse1 (< |twoWay_#in~n| 0)) (or .cse0 .cse1 (and (<= 0 twoWay_~n) (<= twoWay_~n |twoWay_#in~n|)) (<= (+ |twoWay_#in~n| 2147483648) 0)))) [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 37) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point twoWayFINAL(lines 26 38) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point L36(line 36) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point L36-1(line 36) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-22 21:51:38,362 INFO L448 ceAbstractionStarter]: For program point L36-2(line 36) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point L34-1(line 34) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point L32-1(line 32) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L451 ceAbstractionStarter]: At program point twoWayENTRY(lines 26 38) the Hoare annotation is: true [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point twoWayEXIT(lines 26 38) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 21:51:38,363 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 21:51:38,364 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 21:51:38,364 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 21:51:38,364 INFO L444 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (and (<= main_~x~0 2147483647) (<= 0 main_~x~0)) [2018-11-22 21:51:38,364 INFO L448 ceAbstractionStarter]: For program point L48-1(line 48) no Hoare annotation was computed. [2018-11-22 21:51:38,364 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 40 50) the Hoare annotation is: true [2018-11-22 21:51:38,364 INFO L448 ceAbstractionStarter]: For program point L45(lines 45 46) no Hoare annotation was computed. [2018-11-22 21:51:38,364 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 40 50) no Hoare annotation was computed. [2018-11-22 21:51:38,364 INFO L448 ceAbstractionStarter]: For program point L42(lines 42 43) no Hoare annotation was computed. [2018-11-22 21:51:38,364 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 40 50) no Hoare annotation was computed. [2018-11-22 21:51:38,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 09:51:38 BoogieIcfgContainer [2018-11-22 21:51:38,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 21:51:38,367 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 21:51:38,367 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 21:51:38,367 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 21:51:38,367 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:50:47" (3/4) ... [2018-11-22 21:51:38,370 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 21:51:38,373 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure twoWay [2018-11-22 21:51:38,373 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 21:51:38,374 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 21:51:38,376 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-22 21:51:38,376 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 21:51:38,376 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 21:51:38,402 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d0ff73af-8e2f-49e4-94cf-6d9bb7e8e808/bin-2019/utaipan/witness.graphml [2018-11-22 21:51:38,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 21:51:38,403 INFO L168 Benchmark]: Toolchain (without parser) took 51017.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -180.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:51:38,403 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:51:38,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.07 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-22 21:51:38,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.66 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:51:38,404 INFO L168 Benchmark]: Boogie Preprocessor took 12.24 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 21:51:38,404 INFO L168 Benchmark]: RCFGBuilder took 250.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -165.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-22 21:51:38,405 INFO L168 Benchmark]: TraceAbstraction took 50558.21 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -32.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2018-11-22 21:51:38,405 INFO L168 Benchmark]: Witness Printer took 35.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-22 21:51:38,407 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.07 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.66 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.24 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 250.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -165.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 50558.21 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -32.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Witness Printer took 35.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 6 error locations. SAFE Result, 50.5s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 14.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 125 SDtfs, 498 SDslu, 755 SDs, 0 SdLazy, 949 SolverSat, 213 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 360 GetRequests, 188 SyntacticMatches, 10 SemanticMatches, 162 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 41.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 18 NumberOfFragments, 60 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 107 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 34.9s InterpolantComputationTime, 331 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 318 ConstructedInterpolants, 60 QuantifiedInterpolants, 66252 SizeOfPredicates, 29 NumberOfNonLiveVariables, 414 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 82/144 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...