./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a ..................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:27:44,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:27:44,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:27:44,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:27:44,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:27:44,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:27:44,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:27:44,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:27:44,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:27:44,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:27:44,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:27:44,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:27:44,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:27:44,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:27:44,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:27:44,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:27:44,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:27:44,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:27:44,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:27:44,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:27:44,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:27:44,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:27:44,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:27:44,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:27:44,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:27:44,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:27:44,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:27:44,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:27:44,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:27:44,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:27:44,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:27:44,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:27:44,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:27:44,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:27:44,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:27:44,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:27:44,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:27:44,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:27:44,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:27:44,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:27:44,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:27:44,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:27:44,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:27:44,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:27:44,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:27:44,661 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:27:44,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:27:44,662 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:27:44,662 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:27:44,662 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:27:44,662 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:27:44,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:27:44,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:27:44,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:27:44,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:27:44,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:27:44,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:27:44,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:27:44,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:27:44,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:27:44,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:27:44,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:27:44,666 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a [2020-12-09 17:27:44,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:27:44,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:27:44,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:27:44,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:27:44,878 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:27:44,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-12-09 17:27:44,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/b4cce837a/c7925927fbc24abdb93d85840ca3e046/FLAG925c2aa8d [2020-12-09 17:27:45,279 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:27:45,279 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-12-09 17:27:45,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/b4cce837a/c7925927fbc24abdb93d85840ca3e046/FLAG925c2aa8d [2020-12-09 17:27:45,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/b4cce837a/c7925927fbc24abdb93d85840ca3e046 [2020-12-09 17:27:45,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:27:45,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:27:45,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:27:45,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:27:45,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:27:45,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6651ee36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45, skipping insertion in model container [2020-12-09 17:27:45,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:27:45,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:27:45,416 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2020-12-09 17:27:45,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:27:45,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:27:45,450 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2020-12-09 17:27:45,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:27:45,470 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:27:45,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45 WrapperNode [2020-12-09 17:27:45,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:27:45,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:27:45,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:27:45,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:27:45,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:27:45,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:27:45,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:27:45,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:27:45,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... [2020-12-09 17:27:45,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:27:45,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:27:45,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:27:45,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:27:45,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/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 [2020-12-09 17:27:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:27:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:27:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:27:45,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:27:45,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:27:45,881 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 17:27:45,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:27:45 BoogieIcfgContainer [2020-12-09 17:27:45,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:27:45,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:27:45,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:27:45,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:27:45,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:27:45" (1/3) ... [2020-12-09 17:27:45,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fa3625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:27:45, skipping insertion in model container [2020-12-09 17:27:45,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:45" (2/3) ... [2020-12-09 17:27:45,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fa3625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:27:45, skipping insertion in model container [2020-12-09 17:27:45,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:27:45" (3/3) ... [2020-12-09 17:27:45,892 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2020-12-09 17:27:45,905 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:27:45,908 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 17:27:45,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 17:27:45,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:27:45,936 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:27:45,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:27:45,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:27:45,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:27:45,937 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:27:45,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:27:45,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:27:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 17:27:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:27:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:27:45,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:27:45,950 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:27:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:27:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash 3272142, now seen corresponding path program 1 times [2020-12-09 17:27:45,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:27:45,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461235094] [2020-12-09 17:27:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:27:46,026 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 17:27:46,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541433704] [2020-12-09 17:27:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/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 [2020-12-09 17:27:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:27:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 17:27:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:27:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:27:46,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:27:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:27:46,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461235094] [2020-12-09 17:27:46,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:27:46,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541433704] [2020-12-09 17:27:46,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:27:46,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 17:27:46,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186350422] [2020-12-09 17:27:46,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:27:46,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:27:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:27:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:27:46,192 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 6 states. [2020-12-09 17:27:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:27:48,284 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-12-09 17:27:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:27:48,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2020-12-09 17:27:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:27:48,290 INFO L225 Difference]: With dead ends: 40 [2020-12-09 17:27:48,290 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 17:27:48,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:27:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 17:27:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-12-09 17:27:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 17:27:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 17:27:48,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2020-12-09 17:27:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:27:48,315 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 17:27:48,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:27:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 17:27:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:27:48,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:27:48,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:27:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 17:27:48,518 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:27:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:27:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1494492748, now seen corresponding path program 1 times [2020-12-09 17:27:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:27:48,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445807161] [2020-12-09 17:27:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:27:48,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 17:27:48,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910691757] [2020-12-09 17:27:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:27:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:27:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-09 17:27:48,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:27:48,613 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 17:27:48,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 17:27:48,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:27:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:27:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:27:48,909 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:27:48,909 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:27:54,543 WARN L197 SmtUtils]: Spent 5.57 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 17:27:54,566 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-12-09 17:27:54,566 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:27:56,980 WARN L197 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-09 17:27:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:27:56,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445807161] [2020-12-09 17:27:56,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:27:56,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910691757] [2020-12-09 17:27:56,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222377994] [2020-12-09 17:27:57,010 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 17:27:57,010 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:27:57,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:27:57,021 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:27:57,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:27:57,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:27:57,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:27:57,474 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:27:57,626 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-09 17:27:57,873 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-09 17:27:58,011 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 17:27:58,172 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-09 17:27:58,312 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-09 17:27:58,312 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:27:58,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 17:27:58,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-09 17:27:58,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113089224] [2020-12-09 17:27:58,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 17:27:58,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:27:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 17:27:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-12-09 17:27:58,315 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2020-12-09 17:28:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:28:06,824 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-09 17:28:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 17:28:06,824 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2020-12-09 17:28:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:28:06,825 INFO L225 Difference]: With dead ends: 27 [2020-12-09 17:28:06,825 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 17:28:06,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=158, Invalid=597, Unknown=1, NotChecked=0, Total=756 [2020-12-09 17:28:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 17:28:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-09 17:28:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 17:28:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-09 17:28:06,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2020-12-09 17:28:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:28:06,829 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-09 17:28:06,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 17:28:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-09 17:28:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:28:06,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:28:06,830 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-12-09 17:28:07,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:28:07,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:28:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:28:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1495539406, now seen corresponding path program 1 times [2020-12-09 17:28:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:28:07,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043726226] [2020-12-09 17:28:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:28:07,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 17:28:07,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053027329] [2020-12-09 17:28:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/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 [2020-12-09 17:28:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:28:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-09 17:28:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:28:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:07,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:28:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043726226] [2020-12-09 17:28:07,357 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:28:07,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053027329] [2020-12-09 17:28:07,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 17:28:07,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131949039] [2020-12-09 17:28:07,359 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:28:07,360 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:28:07,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:28:07,360 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:28:07,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:28:07,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:28:07,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:28:07,574 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:28:07,712 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-12-09 17:28:08,090 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 17:28:08,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:28:08,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:28:08,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 17:28:08,091 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 17:28:08,091 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:28:08,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-09 17:28:08,306 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 17:28:08,306 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 17:28:08,307 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 17:28:08,307 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 17:28:08,308 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 17:28:08,308 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 17:28:08,309 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 17:28:08,309 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 17:28:08,318 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 17:28:08,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:28:08 BoogieIcfgContainer [2020-12-09 17:28:08,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:28:08,319 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:28:08,319 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:28:08,319 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:28:08,320 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:27:45" (3/4) ... [2020-12-09 17:28:08,322 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 17:28:08,322 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:28:08,323 INFO L168 Benchmark]: Toolchain (without parser) took 23027.06 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 52.0 MB in the beginning and 78.5 MB in the end (delta: -26.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:08,323 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 92.3 MB. Free memory is still 68.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:08,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.49 ms. Allocated memory is still 92.3 MB. Free memory was 51.7 MB in the beginning and 65.9 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:08,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.11 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 64.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:08,325 INFO L168 Benchmark]: Boogie Preprocessor took 20.32 ms. Allocated memory is still 92.3 MB. Free memory was 64.3 MB in the beginning and 63.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:08,325 INFO L168 Benchmark]: RCFGBuilder took 359.27 ms. Allocated memory is still 92.3 MB. Free memory was 63.2 MB in the beginning and 54.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:08,326 INFO L168 Benchmark]: TraceAbstraction took 22433.63 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 54.2 MB in the beginning and 78.5 MB in the end (delta: -24.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:08,326 INFO L168 Benchmark]: Witness Printer took 2.85 ms. Allocated memory is still 115.3 MB. Free memory is still 78.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:08,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 92.3 MB. Free memory is still 68.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.49 ms. Allocated memory is still 92.3 MB. Free memory was 51.7 MB in the beginning and 65.9 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.11 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 64.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.32 ms. Allocated memory is still 92.3 MB. Free memory was 64.3 MB in the beginning and 63.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 359.27 ms. Allocated memory is still 92.3 MB. Free memory was 63.2 MB in the beginning and 54.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22433.63 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 54.2 MB in the beginning and 78.5 MB in the end (delta: -24.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. * Witness Printer took 2.85 ms. Allocated memory is still 115.3 MB. Free memory is still 78.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int X, Y; [L23] long long x, y, v, xy, yx; [L24] X = __VERIFIER_nondet_int() [L11] COND TRUE !cond [L26] Y = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L28] v = ((long long) 2 * Y) - X [L29] y = 0 [L30] x = 0 [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND TRUE v < 0 [L41] v = v + (long long) 2 * Y [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND TRUE v < 0 [L41] v = v + (long long) 2 * Y [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 22.3s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 49 SDslu, 45 SDs, 0 SdLazy, 86 SolverSat, 37 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 6477 SizeOfPredicates, 26 NumberOfNonLiveVariables, 139 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:28:09,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:28:09,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:28:09,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:28:09,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:28:09,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:28:09,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:28:09,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:28:09,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:28:09,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:28:09,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:28:09,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:28:09,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:28:09,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:28:09,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:28:09,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:28:09,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:28:09,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:28:09,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:28:09,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:28:09,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:28:09,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:28:09,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:28:09,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:28:09,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:28:09,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:28:09,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:28:09,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:28:09,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:28:09,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:28:09,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:28:09,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:28:09,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:28:09,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:28:09,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:28:09,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:28:09,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:28:09,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:28:09,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:28:09,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:28:09,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:28:09,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 17:28:09,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:28:09,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:28:09,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:28:09,938 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:28:09,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:28:09,938 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:28:09,938 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:28:09,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:28:09,939 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:28:09,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:28:09,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:28:09,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:28:09,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:28:09,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:28:09,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:28:09,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:28:09,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:28:09,941 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 17:28:09,941 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 17:28:09,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:28:09,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:28:09,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:28:09,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:28:09,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:28:09,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 17:28:09,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:28:09,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:28:09,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:28:09,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:28:09,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:28:09,944 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 17:28:09,944 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 17:28:09,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:28:09,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:28:09,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:28:09,945 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a [2020-12-09 17:28:10,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:28:10,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:28:10,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:28:10,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:28:10,185 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:28:10,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-12-09 17:28:10,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/84ba75b11/3eecd3789b9b47f397499e95e114242f/FLAGc255836e8 [2020-12-09 17:28:10,590 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:28:10,591 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-12-09 17:28:10,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/84ba75b11/3eecd3789b9b47f397499e95e114242f/FLAGc255836e8 [2020-12-09 17:28:10,605 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/data/84ba75b11/3eecd3789b9b47f397499e95e114242f [2020-12-09 17:28:10,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:28:10,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:28:10,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:28:10,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:28:10,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:28:10,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a4e953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10, skipping insertion in model container [2020-12-09 17:28:10,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:28:10,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:28:10,731 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2020-12-09 17:28:10,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:28:10,761 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:28:10,773 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2020-12-09 17:28:10,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:28:10,806 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:28:10,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10 WrapperNode [2020-12-09 17:28:10,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:28:10,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:28:10,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:28:10,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:28:10,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:28:10,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:28:10,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:28:10,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:28:10,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... [2020-12-09 17:28:10,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:28:10,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:28:10,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:28:10,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:28:10,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/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 [2020-12-09 17:28:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 17:28:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:28:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:28:10,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:28:11,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:28:11,301 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 17:28:11,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:28:11 BoogieIcfgContainer [2020-12-09 17:28:11,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:28:11,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:28:11,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:28:11,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:28:11,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:28:10" (1/3) ... [2020-12-09 17:28:11,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f862506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:28:11, skipping insertion in model container [2020-12-09 17:28:11,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:28:10" (2/3) ... [2020-12-09 17:28:11,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f862506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:28:11, skipping insertion in model container [2020-12-09 17:28:11,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:28:11" (3/3) ... [2020-12-09 17:28:11,310 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2020-12-09 17:28:11,326 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:28:11,328 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 17:28:11,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 17:28:11,352 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:28:11,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:28:11,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:28:11,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:28:11,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:28:11,352 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:28:11,352 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:28:11,352 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:28:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-09 17:28:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:28:11,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:28:11,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:28:11,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:28:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:28:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-09 17:28:11,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:28:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149039620] [2020-12-09 17:28:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 17:28:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:28:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 17:28:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:28:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:11,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:28:11,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149039620] [2020-12-09 17:28:11,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:28:11,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:28:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781775788] [2020-12-09 17:28:11,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:28:11,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:28:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:28:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:28:11,540 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-09 17:28:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:28:11,553 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-09 17:28:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:28:11,554 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-09 17:28:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:28:11,562 INFO L225 Difference]: With dead ends: 39 [2020-12-09 17:28:11,562 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 17:28:11,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:28:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 17:28:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 17:28:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 17:28:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-09 17:28:11,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-12-09 17:28:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:28:11,588 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-09 17:28:11,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:28:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-09 17:28:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:28:11,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:28:11,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:28:11,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 17:28:11,790 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:28:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:28:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-09 17:28:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:28:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187350455] [2020-12-09 17:28:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 17:28:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:28:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 17:28:11,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:28:12,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:12,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:12,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 17:28:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:12,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:28:12,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187350455] [2020-12-09 17:28:12,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:28:12,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 17:28:12,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548300493] [2020-12-09 17:28:12,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:28:12,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:28:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:28:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:28:12,243 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-12-09 17:28:12,497 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-12-09 17:28:12,669 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-09 17:28:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:28:12,991 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-09 17:28:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:28:12,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-09 17:28:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:28:12,992 INFO L225 Difference]: With dead ends: 30 [2020-12-09 17:28:12,992 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 17:28:12,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:28:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 17:28:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-12-09 17:28:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:28:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 17:28:12,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-12-09 17:28:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:28:12,997 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 17:28:12,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:28:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 17:28:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:28:12,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:28:12,997 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:28:13,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 17:28:13,199 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:28:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:28:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2020-12-09 17:28:13,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:28:13,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122790183] [2020-12-09 17:28:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 17:28:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:28:13,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 17:28:13,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:28:13,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:13,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:13,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:13,668 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:13,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:28:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:13,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:28:13,933 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-12-09 17:28:13,934 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:28:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:14,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122790183] [2020-12-09 17:28:14,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1968358625] [2020-12-09 17:28:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:28:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:28:14,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 17:28:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:28:15,618 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-12-09 17:28:16,254 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-09 17:28:16,838 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 17:28:16,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:16,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:16,856 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:28:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:16,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:28:18,811 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 17:28:21,063 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 17:28:24,356 WARN L197 SmtUtils]: Spent 998.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 17:28:28,236 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 17:28:32,259 WARN L197 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 17:28:32,265 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:28:32,266 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:28:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:32,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650920921] [2020-12-09 17:28:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:28:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:28:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 17:28:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:28:33,041 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-12-09 17:28:33,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:33,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:33,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:33,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:28:33,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:28:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:33,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:28:34,070 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:28:34,070 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:28:39,291 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 17:28:39,374 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-12-09 17:28:39,374 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:28:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:28:39,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 17:28:39,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11, 8, 9, 9] total 28 [2020-12-09 17:28:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784727822] [2020-12-09 17:28:39,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-09 17:28:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:28:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-09 17:28:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=626, Unknown=1, NotChecked=0, Total=756 [2020-12-09 17:28:39,476 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 28 states. [2020-12-09 17:28:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:28:39,477 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 17:28:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:28:39,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2020-12-09 17:28:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:28:39,478 INFO L225 Difference]: With dead ends: 20 [2020-12-09 17:28:39,478 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:28:39,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=129, Invalid=626, Unknown=1, NotChecked=0, Total=756 [2020-12-09 17:28:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:28:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:28:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:28:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:28:39,479 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-12-09 17:28:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:28:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:28:39,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-09 17:28:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:28:39,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:28:40,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 17:28:40,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 17:28:40,137 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L265 CegarLoopResult]: At program point L52(lines 21 53) the Hoare annotation is: true [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L40(lines 40 45) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L258 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: false [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 17:28:40,138 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 17:28:40,139 INFO L262 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-12-09 17:28:40,139 INFO L258 CegarLoopResult]: At program point L14-2(lines 36 37) the Hoare annotation is: false [2020-12-09 17:28:40,139 INFO L262 CegarLoopResult]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2020-12-09 17:28:40,139 INFO L262 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-12-09 17:28:40,139 INFO L262 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-12-09 17:28:40,139 INFO L265 CegarLoopResult]: At program point L14-5(lines 13 19) the Hoare annotation is: true [2020-12-09 17:28:40,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:28:40 BoogieIcfgContainer [2020-12-09 17:28:40,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:28:40,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:28:40,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:28:40,144 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:28:40,145 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:28:11" (3/4) ... [2020-12-09 17:28:40,147 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:28:40,153 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 17:28:40,153 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 17:28:40,154 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 17:28:40,154 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 17:28:40,181 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_731913fb-a79b-4036-bed5-f5e7a2198fb2/bin/utaipan/witness.graphml [2020-12-09 17:28:40,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:28:40,182 INFO L168 Benchmark]: Toolchain (without parser) took 29573.36 ms. Allocated memory was 56.6 MB in the beginning and 86.0 MB in the end (delta: 29.4 MB). Free memory was 36.1 MB in the beginning and 58.8 MB in the end (delta: -22.7 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:40,182 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 39.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:40,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.83 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 35.9 MB in the beginning and 55.5 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:40,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.61 ms. Allocated memory is still 71.3 MB. Free memory was 55.5 MB in the beginning and 54.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:40,184 INFO L168 Benchmark]: Boogie Preprocessor took 19.29 ms. Allocated memory is still 71.3 MB. Free memory was 54.0 MB in the beginning and 52.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:40,184 INFO L168 Benchmark]: RCFGBuilder took 434.87 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 38.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:40,184 INFO L168 Benchmark]: TraceAbstraction took 28839.99 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 38.0 MB in the beginning and 61.7 MB in the end (delta: -23.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:28:40,185 INFO L168 Benchmark]: Witness Printer took 37.06 ms. Allocated memory is still 86.0 MB. Free memory was 61.7 MB in the beginning and 58.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:28:40,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 39.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 197.83 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 35.9 MB in the beginning and 55.5 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.61 ms. Allocated memory is still 71.3 MB. Free memory was 55.5 MB in the beginning and 54.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.29 ms. Allocated memory is still 71.3 MB. Free memory was 54.0 MB in the beginning and 52.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 434.87 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 38.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28839.99 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 38.0 MB in the beginning and 61.7 MB in the end (delta: -23.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 37.06 ms. Allocated memory is still 86.0 MB. Free memory was 61.7 MB in the beginning and 58.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 78 SDslu, 13 SDs, 0 SdLazy, 37 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 25.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, 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, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 6 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 26.1s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 94 ConstructedInterpolants, 5 QuantifiedInterpolants, 18214 SizeOfPredicates, 61 NumberOfNonLiveVariables, 217 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 5/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...