./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 f4456e2c68ec8b38c6ee81a801d6ec2920f9b858 ........................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 f4456e2c68ec8b38c6ee81a801d6ec2920f9b858 ................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:49,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:49,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:49,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:49,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:49,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:49,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:49,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:49,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:49,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:49,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:49,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:49,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:49,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:49,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:49,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:49,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:49,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:49,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:49,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:49,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:49,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:49,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:49,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:49,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:49,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:49,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:49,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:49,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:49,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:49,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:49,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:49,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:49,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:49,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:49,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:49,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:49,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:49,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:49,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:49,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:49,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:49,331 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:49,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:49,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:49,332 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:49,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:49,333 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:49,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:49,333 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:49,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:49,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:49,334 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:49,334 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:49,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:49,335 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:49,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:49,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:49,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:49,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:49,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:49,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:49,337 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:49,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:49,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:49,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:49,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:49,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:49,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:49,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:49,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:49,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:49,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:49,339 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:49,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:49,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:49,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:49,340 INFO L138 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_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 -> f4456e2c68ec8b38c6ee81a801d6ec2920f9b858 [2019-10-22 11:25:49,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:49,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:49,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:49,391 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:49,391 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:49,392 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/simple_4-2.c [2019-10-22 11:25:49,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/f102b31f9/040eef65808e4b65ba6317750d63d830/FLAGe1a99c43d [2019-10-22 11:25:49,870 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:49,871 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/sv-benchmarks/c/loop-acceleration/simple_4-2.c [2019-10-22 11:25:49,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/f102b31f9/040eef65808e4b65ba6317750d63d830/FLAGe1a99c43d [2019-10-22 11:25:50,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/f102b31f9/040eef65808e4b65ba6317750d63d830 [2019-10-22 11:25:50,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:50,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:50,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:50,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:50,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:50,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcffdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50, skipping insertion in model container [2019-10-22 11:25:50,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,267 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:50,283 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:50,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:50,431 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:50,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:50,517 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:50,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50 WrapperNode [2019-10-22 11:25:50,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:50,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:50,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:50,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:50,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:50,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:50,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:50,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:50,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... [2019-10-22 11:25:50,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:50,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:50,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:50,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:50,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 [2019-10-22 11:25:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:50,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:50,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:50,717 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:25:50,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:50 BoogieIcfgContainer [2019-10-22 11:25:50,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:50,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:50,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:50,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:50,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:50" (1/3) ... [2019-10-22 11:25:50,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4579ab4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:50, skipping insertion in model container [2019-10-22 11:25:50,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:50" (2/3) ... [2019-10-22 11:25:50,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4579ab4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:50, skipping insertion in model container [2019-10-22 11:25:50,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:50" (3/3) ... [2019-10-22 11:25:50,726 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2019-10-22 11:25:50,734 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:50,739 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:50,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:50,764 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:50,764 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:50,764 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:50,765 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:50,765 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:50,765 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:50,765 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:50,765 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 11:25:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:25:50,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:50,779 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:25:50,780 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 11:25:50,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:50,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842026206] [2019-10-22 11:25:50,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:50,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:50,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:50,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842026206] [2019-10-22 11:25:50,951 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:50,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:25:50,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430886344] [2019-10-22 11:25:50,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:25:50,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:25:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:25:50,973 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-10-22 11:25:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:51,001 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-10-22 11:25:51,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:25:51,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 11:25:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:51,018 INFO L225 Difference]: With dead ends: 17 [2019-10-22 11:25:51,018 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 11:25:51,030 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:25:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 11:25:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 11:25:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 11:25:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 11:25:51,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 11:25:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:51,068 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 11:25:51,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:25:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 11:25:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:25:51,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:51,069 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:25:51,070 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-10-22 11:25:51,070 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:51,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058355549] [2019-10-22 11:25:51,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:51,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:51,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:51,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058355549] [2019-10-22 11:25:51,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949992317] [2019-10-22 11:25:51,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 [2019-10-22 11:25:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:51,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:25:51,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:51,218 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:51,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1573638664] [2019-10-22 11:25:51,247 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 7 [2019-10-22 11:25:51,282 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:51,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:51,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:51,538 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:25:51,556 INFO L168 Benchmark]: Toolchain (without parser) took 1297.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -85.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:51,556 INFO L168 Benchmark]: CDTParser took 1.91 ms. Allocated memory is still 1.0 GB. Free memory is still 962.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:51,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -151.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:51,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.79 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:51,559 INFO L168 Benchmark]: Boogie Preprocessor took 16.33 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:51,560 INFO L168 Benchmark]: RCFGBuilder took 158.73 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:51,560 INFO L168 Benchmark]: TraceAbstraction took 823.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:51,563 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.91 ms. Allocated memory is still 1.0 GB. Free memory is still 962.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 270.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -151.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.79 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.33 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.73 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 823.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:53,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:53,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:53,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:53,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:53,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:53,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:53,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:53,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:53,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:53,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:53,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:53,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:53,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:53,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:53,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:53,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:53,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:53,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:53,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:53,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:53,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:53,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:53,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:53,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:53,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:53,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:53,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:53,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:53,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:53,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:53,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:53,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:53,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:53,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:53,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:53,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:53,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:53,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:53,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:53,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:53,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:53,938 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:53,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:53,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:53,939 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:53,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:53,939 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:53,939 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:53,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:53,939 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:53,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:53,940 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:53,941 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:53,942 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:53,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:53,942 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:53,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:53,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:53,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:53,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:53,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:53,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:53,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:53,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:53,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:53,943 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:53,943 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:53,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:53,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:53,944 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 -> f4456e2c68ec8b38c6ee81a801d6ec2920f9b858 [2019-10-22 11:25:53,981 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:53,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:53,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:53,999 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:53,999 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:54,000 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/simple_4-2.c [2019-10-22 11:25:54,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/f51aadd19/bb2ed5d7ba4e460884a99e9cb21042f6/FLAGdbbaa4150 [2019-10-22 11:25:54,477 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:54,478 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/sv-benchmarks/c/loop-acceleration/simple_4-2.c [2019-10-22 11:25:54,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/f51aadd19/bb2ed5d7ba4e460884a99e9cb21042f6/FLAGdbbaa4150 [2019-10-22 11:25:54,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/data/f51aadd19/bb2ed5d7ba4e460884a99e9cb21042f6 [2019-10-22 11:25:54,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:54,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:54,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:54,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:54,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:54,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:54" (1/1) ... [2019-10-22 11:25:54,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af19152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:54, skipping insertion in model container [2019-10-22 11:25:54,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:54" (1/1) ... [2019-10-22 11:25:54,873 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:54,887 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:55,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:55,082 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:55,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:55,117 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:55,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55 WrapperNode [2019-10-22 11:25:55,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:55,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:55,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:55,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:55,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:55,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:55,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:55,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:55,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:55,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:55,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:55,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:55,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 [2019-10-22 11:25:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:55,489 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:55,490 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:25:55,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:55 BoogieIcfgContainer [2019-10-22 11:25:55,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:55,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:55,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:55,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:55,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:54" (1/3) ... [2019-10-22 11:25:55,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24baea2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:55, skipping insertion in model container [2019-10-22 11:25:55,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (2/3) ... [2019-10-22 11:25:55,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24baea2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:55, skipping insertion in model container [2019-10-22 11:25:55,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:55" (3/3) ... [2019-10-22 11:25:55,498 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2019-10-22 11:25:55,511 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:55,520 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:55,532 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:55,554 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:55,554 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:55,554 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:55,555 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:55,555 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:55,555 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:55,555 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:55,555 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 11:25:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:25:55,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:55,578 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:25:55,580 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 11:25:55,594 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:55,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1933833341] [2019-10-22 11:25:55,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:55,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:25:55,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:55,700 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:55,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933833341] [2019-10-22 11:25:55,753 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:55,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:25:55,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999605809] [2019-10-22 11:25:55,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:25:55,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:55,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:25:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:25:55,788 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-10-22 11:25:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:55,845 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-10-22 11:25:55,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:25:55,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:25:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:55,856 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:25:55,856 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:25:55,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:25:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:25:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:25:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:25:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-10-22 11:25:55,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-10-22 11:25:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:55,906 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-10-22 11:25:55,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:25:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-10-22 11:25:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:25:55,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:55,907 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-10-22 11:25:56,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:56,108 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:56,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 1 times [2019-10-22 11:25:56,109 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:56,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [907678587] [2019-10-22 11:25:56,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:56,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:56,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:56,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:56,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907678587] [2019-10-22 11:25:56,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023149300] [2019-10-22 11:25:56,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/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 [2019-10-22 11:25:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:56,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:56,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:56,260 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:56,266 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:56,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 7 [2019-10-22 11:25:56,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501775906] [2019-10-22 11:25:56,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:25:56,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:25:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:56,269 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2019-10-22 11:25:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:56,382 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-10-22 11:25:56,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:25:56,383 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-10-22 11:25:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:56,384 INFO L225 Difference]: With dead ends: 16 [2019-10-22 11:25:56,384 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 11:25:56,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:25:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 11:25:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 11:25:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 11:25:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-22 11:25:56,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2019-10-22 11:25:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:56,393 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-22 11:25:56,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:25:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-22 11:25:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:25:56,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:56,394 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-10-22 11:25:56,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:56,796 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 2 times [2019-10-22 11:25:56,797 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:56,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [525585323] [2019-10-22 11:25:56,797 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:56,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 11:25:56,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:56,836 WARN L254 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:56,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:56,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:25:56,873 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:25:56,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525585323] [2019-10-22 11:25:56,903 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:56,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:25:56,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99678574] [2019-10-22 11:25:56,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:25:56,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:56,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:25:56,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:25:56,905 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-10-22 11:25:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:56,944 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-10-22 11:25:56,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:56,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-22 11:25:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:56,944 INFO L225 Difference]: With dead ends: 12 [2019-10-22 11:25:56,945 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:25:56,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:25:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:25:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:25:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:25:56,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-10-22 11:25:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:56,947 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:25:56,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:25:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:25:56,947 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:25:57,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:57,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:25:57,206 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:25:57,206 INFO L439 ceAbstractionStarter]: At program point L13-2(lines 13 15) the Hoare annotation is: (= (bvurem ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv0 32)) [2019-10-22 11:25:57,207 INFO L443 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2019-10-22 11:25:57,207 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 11:25:57,207 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:25:57,207 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:25:57,207 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 11:25:57,207 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 11:25:57,207 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 1 18) the Hoare annotation is: true [2019-10-22 11:25:57,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:57 BoogieIcfgContainer [2019-10-22 11:25:57,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:57,218 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:57,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:57,218 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:57,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:55" (3/4) ... [2019-10-22 11:25:57,221 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:25:57,231 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 11:25:57,231 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:25:57,264 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a44a6a40-4cba-446b-8637-b337a69c7ac4/bin/utaipan/witness.graphml [2019-10-22 11:25:57,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:57,267 INFO L168 Benchmark]: Toolchain (without parser) took 2408.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -111.0 MB). Peak memory consumption was 55.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:57,267 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:57,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.03 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:57,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.61 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:57,269 INFO L168 Benchmark]: Boogie Preprocessor took 132.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -221.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:57,270 INFO L168 Benchmark]: RCFGBuilder took 200.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:57,270 INFO L168 Benchmark]: TraceAbstraction took 1725.32 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: 80.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:57,271 INFO L168 Benchmark]: Witness Printer took 46.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:57,274 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.03 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.61 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 132.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -221.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 200.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1725.32 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: 80.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 11.5 GB. * Witness Printer took 46.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 13]: Loop Invariant Derived loop invariant: ~bvurem32(x, 2bv32) == 0bv32 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 7 SDslu, 17 SDs, 0 SdLazy, 36 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 9 NumberOfFragments, 6 HoareAnnotationTreeSize, 2 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 772 SizeOfPredicates, 7 NumberOfNonLiveVariables, 40 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 42/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...