./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.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_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/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 e60c1dde74a24774e6b82459081106b30d3af9a9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:08:28,966 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:08:28,968 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:08:28,982 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:08:28,983 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:08:28,985 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:08:28,988 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:08:28,990 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:08:28,993 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:08:28,995 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:08:28,997 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:08:28,998 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:08:28,999 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:08:28,999 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:08:29,000 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:08:29,001 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:08:29,003 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:08:29,005 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:08:29,007 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:08:29,008 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:08:29,009 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:08:29,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:08:29,024 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:08:29,026 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:08:29,027 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:08:29,027 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:08:29,028 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:08:29,029 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:08:29,032 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:08:29,033 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:08:29,034 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:08:29,036 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:08:29,036 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:08:29,036 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:08:29,038 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:08:29,039 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:08:29,041 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 21:08:29,059 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:08:29,061 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:08:29,062 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:08:29,063 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:08:29,063 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:08:29,063 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:08:29,063 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 21:08:29,064 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:08:29,065 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 21:08:29,065 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 21:08:29,065 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:08:29,066 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:08:29,068 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:08:29,068 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:08:29,068 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:08:29,068 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:08:29,068 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:08:29,069 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:08:29,069 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:08:29,069 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:08:29,069 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:08:29,069 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:08:29,069 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:08:29,070 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:08:29,070 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:08:29,070 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:08:29,070 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:08:29,070 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:08:29,071 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:08:29,071 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:08:29,071 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 21:08:29,071 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:08:29,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:08:29,071 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:08:29,072 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_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/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 -> e60c1dde74a24774e6b82459081106b30d3af9a9 [2018-10-26 21:08:29,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:08:29,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:08:29,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:08:29,140 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:08:29,140 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:08:29,141 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/../../sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i [2018-10-26 21:08:29,202 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/data/4611f65df/e5e3e45bbd834cf8be6b3ed5e7d391e8/FLAG305c4236a [2018-10-26 21:08:29,573 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:08:29,574 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i [2018-10-26 21:08:29,579 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/data/4611f65df/e5e3e45bbd834cf8be6b3ed5e7d391e8/FLAG305c4236a [2018-10-26 21:08:29,594 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/data/4611f65df/e5e3e45bbd834cf8be6b3ed5e7d391e8 [2018-10-26 21:08:29,597 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:08:29,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:08:29,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:08:29,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:08:29,606 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:08:29,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7454af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29, skipping insertion in model container [2018-10-26 21:08:29,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:08:29,637 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:08:29,776 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:08:29,779 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:08:29,793 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:08:29,805 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:08:29,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29 WrapperNode [2018-10-26 21:08:29,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:08:29,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:08:29,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:08:29,806 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:08:29,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:08:29,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:08:29,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:08:29,829 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:08:29,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... [2018-10-26 21:08:29,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:08:29,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:08:29,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:08:29,853 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:08:29,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/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 21:08:30,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:08:30,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:08:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:08:30,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:08:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:08:30,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:08:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 21:08:30,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 21:08:30,260 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:08:30,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:08:30 BoogieIcfgContainer [2018-10-26 21:08:30,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:08:30,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:08:30,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:08:30,265 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:08:30,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:08:29" (1/3) ... [2018-10-26 21:08:30,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3548a332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:08:30, skipping insertion in model container [2018-10-26 21:08:30,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:08:29" (2/3) ... [2018-10-26 21:08:30,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3548a332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:08:30, skipping insertion in model container [2018-10-26 21:08:30,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:08:30" (3/3) ... [2018-10-26 21:08:30,269 INFO L112 eAbstractionObserver]: Analyzing ICFG const_true-unreach-call1.i [2018-10-26 21:08:30,277 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:08:30,284 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:08:30,296 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:08:30,332 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:08:30,333 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:08:30,333 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:08:30,333 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:08:30,333 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:08:30,333 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:08:30,333 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:08:30,333 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:08:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-26 21:08:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 21:08:30,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:08:30,358 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:08:30,360 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:08:30,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:08:30,367 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-26 21:08:30,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:08:30,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:30,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:08:30,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:30,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:08:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:08:30,481 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 21:08:30,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:08:30,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 21:08:30,486 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:08:30,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 21:08:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 21:08:30,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 21:08:30,507 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-26 21:08:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:08:30,529 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-26 21:08:30,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 21:08:30,531 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 21:08:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:08:30,539 INFO L225 Difference]: With dead ends: 29 [2018-10-26 21:08:30,540 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 21:08:30,543 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 21:08:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 21:08:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 21:08:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 21:08:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 21:08:30,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-26 21:08:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:08:30,581 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 21:08:30,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 21:08:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 21:08:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 21:08:30,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:08:30,583 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:08:30,583 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:08:30,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:08:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-26 21:08:30,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:08:30,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:30,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:08:30,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:30,585 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:08:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:08:30,720 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 21:08:30,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:08:30,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:08:30,723 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:08:30,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:08:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:08:30,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:08:30,725 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-26 21:08:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:08:30,779 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-26 21:08:30,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:08:30,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 21:08:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:08:30,781 INFO L225 Difference]: With dead ends: 19 [2018-10-26 21:08:30,781 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 21:08:30,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:08:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 21:08:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 21:08:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 21:08:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 21:08:30,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-26 21:08:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:08:30,787 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 21:08:30,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:08:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 21:08:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 21:08:30,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:08:30,788 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:08:30,788 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:08:30,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:08:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-26 21:08:30,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:08:30,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:30,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:08:30,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:30,790 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:08:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:08:30,902 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 21:08:30,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:08:30,903 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:08:30,904 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-26 21:08:30,907 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-26 21:08:30,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 21:08:30,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 21:08:31,055 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 21:08:31,223 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 21:08:31,224 INFO L272 AbstractInterpreter]: Visited 12 different actions 81 times. Merged at 3 different actions 31 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-26 21:08:31,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:08:31,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 21:08:31,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:08:31,240 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:08:31,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:08:31,260 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:08:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:08:31,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:08:31,327 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 21:08:31,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:08:31,417 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 21:08:31,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:08:31,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2018-10-26 21:08:31,439 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:08:31,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:08:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:08:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:08:31,440 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-26 21:08:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:08:31,464 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-26 21:08:31,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:08:31,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-26 21:08:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:08:31,466 INFO L225 Difference]: With dead ends: 21 [2018-10-26 21:08:31,466 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 21:08:31,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:08:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 21:08:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 21:08:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 21:08:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-26 21:08:31,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-26 21:08:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:08:31,471 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-26 21:08:31,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:08:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-26 21:08:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 21:08:31,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:08:31,472 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:08:31,473 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:08:31,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:08:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-10-26 21:08:31,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:08:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:31,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:08:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:08:31,475 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:08:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:08:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:08:31,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:08:31,608 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:08:31,609 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:08:31,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:08:31,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:08:31,609 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 21:08:31,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:08:31,627 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:08:31,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 21:08:31,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:08:31,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:08:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 21:08:31,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:08:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 21:08:32,036 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:08:32,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 11 [2018-10-26 21:08:32,037 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:08:32,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:08:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:08:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:08:32,038 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-26 21:08:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:08:32,072 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-26 21:08:32,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:08:32,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-26 21:08:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:08:32,073 INFO L225 Difference]: With dead ends: 16 [2018-10-26 21:08:32,073 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 21:08:32,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:08:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 21:08:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 21:08:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 21:08:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 21:08:32,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-10-26 21:08:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:08:32,075 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 21:08:32,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:08:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 21:08:32,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 21:08:32,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 21:08:32,146 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 21:08:32,147 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 21:08:32,147 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 21:08:32,147 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 21:08:32,147 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 21:08:32,147 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 21:08:32,147 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-10-26 21:08:32,147 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-10-26 21:08:32,148 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-10-26 21:08:32,148 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-10-26 21:08:32,148 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (= main_~x~0 0) (and (<= 0 main_~y~0) (<= main_~y~0 0))) [2018-10-26 21:08:32,148 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (= main_~x~0 0) [2018-10-26 21:08:32,148 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-26 21:08:32,148 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-26 21:08:32,149 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-26 21:08:32,149 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-26 21:08:32,149 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-26 21:08:32,149 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-26 21:08:32,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:08:32 BoogieIcfgContainer [2018-10-26 21:08:32,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:08:32,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 21:08:32,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 21:08:32,159 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 21:08:32,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:08:30" (3/4) ... [2018-10-26 21:08:32,163 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 21:08:32,168 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 21:08:32,168 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 21:08:32,168 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-26 21:08:32,172 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-26 21:08:32,173 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-26 21:08:32,173 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 21:08:32,219 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4828dc31-ac0d-40ac-bbe4-103fb15b31ae/bin-2019/utaipan/witness.graphml [2018-10-26 21:08:32,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 21:08:32,220 INFO L168 Benchmark]: Toolchain (without parser) took 2622.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 959.7 MB in the beginning and 1.0 GB in the end (delta: -81.3 MB). Peak memory consumption was 66.6 MB. Max. memory is 11.5 GB. [2018-10-26 21:08:32,221 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:08:32,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.92 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 948.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-10-26 21:08:32,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.42 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:08:32,223 INFO L168 Benchmark]: Boogie Preprocessor took 23.11 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:08:32,223 INFO L168 Benchmark]: RCFGBuilder took 408.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 948.8 MB in the beginning and 1.1 GB in the end (delta: -186.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:08:32,224 INFO L168 Benchmark]: TraceAbstraction took 1897.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 90.8 MB). Peak memory consumption was 90.8 MB. Max. memory is 11.5 GB. [2018-10-26 21:08:32,225 INFO L168 Benchmark]: Witness Printer took 59.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-10-26 21:08:32,228 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 206.92 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 948.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.42 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.11 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 408.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 948.8 MB in the beginning and 1.1 GB in the end (delta: -186.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1897.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 90.8 MB). Peak memory consumption was 90.8 MB. Max. memory is 11.5 GB. * Witness Printer took 59.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: x == 0 || (0 <= y && y <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 1 SDslu, 54 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 13 NumberOfFragments, 19 HoareAnnotationTreeSize, 10 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 77 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 3033 SizeOfPredicates, 3 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 12/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...