./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.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_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 66d8c88ea116cc4d626a5309461c01e3740129b8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 66d8c88ea116cc4d626a5309461c01e3740129b8 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:06:48,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:06:48,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:06:48,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:06:48,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:06:48,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:06:48,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:06:48,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:06:48,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:06:48,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:06:48,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:06:48,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:06:48,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:06:48,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:06:48,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:06:48,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:06:48,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:06:48,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:06:48,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:06:48,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:06:48,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:06:48,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:06:48,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:06:48,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:06:48,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:06:48,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:06:48,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:06:48,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:06:48,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:06:48,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:06:48,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:06:48,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:06:48,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:06:48,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:06:48,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:06:48,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:06:48,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:06:48,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:06:48,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:06:48,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:06:48,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:06:48,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:06:48,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:06:48,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:06:48,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:06:48,717 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:06:48,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:06:48,717 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:06:48,718 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:06:48,718 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:06:48,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:06:48,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:06:48,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:06:48,718 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:06:48,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:06:48,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:06:48,719 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:06:48,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:06:48,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:06:48,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:06:48,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:06:48,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:06:48,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:06:48,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:06:48,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:06:48,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:06:48,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:06:48,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:06:48,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:06:48,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:06:48,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:06:48,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:06:48,722 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_e40bed24-be12-4a21-b556-cb93a76367f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d8c88ea116cc4d626a5309461c01e3740129b8 [2020-12-09 12:06:48,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:06:48,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:06:48,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:06:48,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:06:48,935 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:06:48,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c [2020-12-09 12:06:48,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/7a56682b0/2512d18f5e3143b98785c7b00bdc1eb4/FLAG823ddd986 [2020-12-09 12:06:49,332 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:06:49,333 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c [2020-12-09 12:06:49,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/7a56682b0/2512d18f5e3143b98785c7b00bdc1eb4/FLAG823ddd986 [2020-12-09 12:06:49,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/7a56682b0/2512d18f5e3143b98785c7b00bdc1eb4 [2020-12-09 12:06:49,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:06:49,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:06:49,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:06:49,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:06:49,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:06:49,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2645b8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49, skipping insertion in model container [2020-12-09 12:06:49,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:06:49,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:06:49,473 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_e40bed24-be12-4a21-b556-cb93a76367f9/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c[597,610] [2020-12-09 12:06:49,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:06:49,491 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:06:49,500 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_e40bed24-be12-4a21-b556-cb93a76367f9/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c[597,610] [2020-12-09 12:06:49,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:06:49,515 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:06:49,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49 WrapperNode [2020-12-09 12:06:49,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:06:49,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:06:49,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:06:49,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:06:49,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:06:49,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:06:49,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:06:49,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:06:49,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... [2020-12-09 12:06:49,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:06:49,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:06:49,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:06:49,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:06:49,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:06:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:06:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:06:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:06:49,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:06:49,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:06:49,893 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 12:06:49,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:06:49 BoogieIcfgContainer [2020-12-09 12:06:49,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:06:49,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:06:49,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:06:49,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:06:49,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:06:49" (1/3) ... [2020-12-09 12:06:49,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49734160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:06:49, skipping insertion in model container [2020-12-09 12:06:49,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:06:49" (2/3) ... [2020-12-09 12:06:49,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49734160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:06:49, skipping insertion in model container [2020-12-09 12:06:49,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:06:49" (3/3) ... [2020-12-09 12:06:49,903 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound1.c [2020-12-09 12:06:49,915 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:06:49,918 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 12:06:49,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 12:06:49,952 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:06:49,952 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:06:49,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:06:49,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:06:49,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:06:49,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:06:49,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:06:49,953 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:06:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 12:06:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 12:06:49,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:06:49,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 12:06:49,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:06:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:06:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 3272142, now seen corresponding path program 1 times [2020-12-09 12:06:49,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:06:49,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49899515] [2020-12-09 12:06:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:06:50,050 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:06:50,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861122883] [2020-12-09 12:06:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:06:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:06:50,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 12:06:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:06:50,182 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 12:06:50,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:06:50,203 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 12:06:50,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49899515] [2020-12-09 12:06:50,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:06:50,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861122883] [2020-12-09 12:06:50,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:06:50,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 12:06:50,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044768363] [2020-12-09 12:06:50,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:06:50,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:06:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:06:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:06:50,218 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 6 states. [2020-12-09 12:06:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:06:50,295 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2020-12-09 12:06:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:06:50,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2020-12-09 12:06:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:06:50,301 INFO L225 Difference]: With dead ends: 28 [2020-12-09 12:06:50,301 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 12:06:50,303 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 12:06:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 12:06:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 12:06:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 12:06:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 12:06:50,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-12-09 12:06:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:06:50,326 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 12:06:50,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:06:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 12:06:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 12:06:50,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:06:50,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 12:06:50,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 12:06:50,528 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:06:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:06:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1494492748, now seen corresponding path program 1 times [2020-12-09 12:06:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:06:50,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164339070] [2020-12-09 12:06:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:06:50,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:06:50,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243226657] [2020-12-09 12:06:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:06:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:06:50,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-09 12:06:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:06:50,670 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 12:06:50,671 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 12:06:50,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:06:50,943 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 12:06:50,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:06:51,020 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:06:51,020 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:06:53,378 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 12:06:53,394 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-12-09 12:06:53,394 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:06:53,787 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-09 12:06:53,795 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 12:06:53,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164339070] [2020-12-09 12:06:53,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:06:53,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243226657] [2020-12-09 12:06:53,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124875571] [2020-12-09 12:06:53,811 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 12:06:53,811 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:06:53,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:06:53,818 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:06:53,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:06:53,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:06:53,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:06:54,210 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:06:54,357 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-09 12:06:54,623 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-09 12:06:54,755 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-09 12:06:54,896 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-09 12:06:55,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:06:55,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:06:55,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-09 12:06:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904369684] [2020-12-09 12:06:55,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 12:06:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:06:55,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 12:06:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-12-09 12:06:55,022 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2020-12-09 12:07:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:07:04,839 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-09 12:07:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 12:07:04,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2020-12-09 12:07:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:07:04,843 INFO L225 Difference]: With dead ends: 23 [2020-12-09 12:07:04,844 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 12:07:04,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2020-12-09 12:07:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 12:07:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 12:07:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 12:07:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-09 12:07:04,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-12-09 12:07:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:07:04,848 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-09 12:07:04,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 12:07:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-09 12:07:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 12:07:04,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:07:04,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2020-12-09 12:07:05,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:07:05,051 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:07:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:07:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash -975333556, now seen corresponding path program 2 times [2020-12-09 12:07:05,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:07:05,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968410020] [2020-12-09 12:07:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:07:05,085 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:07:05,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881146280] [2020-12-09 12:07:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:05,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 12:07:05,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:07:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 12:07:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:07:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968410020] [2020-12-09 12:07:05,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:07:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881146280] [2020-12-09 12:07:05,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: cannot handle proper monomial [2020-12-09 12:07:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954022158] [2020-12-09 12:07:05,267 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 12:07:05,267 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:07:05,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:07:05,267 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:07:05,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:07:05,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:07:05,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:07:05,459 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:07:05,601 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-09 12:07:06,058 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-09 12:07:06,183 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-09 12:07:06,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:07:06,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:07:06,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 12:07:06,184 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 12:07:06,184 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:07:06,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:07:06,399 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 12:07:06,399 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:07:06,400 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 12:07:06,400 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:07:06,401 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 12:07:06,401 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:07:06,402 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 12:07:06,402 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:07:06,403 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 12:07:06,403 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:07:06,427 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 12:07:06,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:07:06 BoogieIcfgContainer [2020-12-09 12:07:06,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:07:06,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:07:06,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:07:06,429 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:07:06,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:06:49" (3/4) ... [2020-12-09 12:07:06,433 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 12:07:06,433 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:07:06,435 INFO L168 Benchmark]: Toolchain (without parser) took 17084.38 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 80.9 MB in the beginning and 92.4 MB in the end (delta: -11.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:06,435 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 109.1 MB. Free memory is still 86.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:07:06,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.75 ms. Allocated memory is still 109.1 MB. Free memory was 80.7 MB in the beginning and 70.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:06,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.41 ms. Allocated memory is still 109.1 MB. Free memory was 70.7 MB in the beginning and 69.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:06,437 INFO L168 Benchmark]: Boogie Preprocessor took 19.49 ms. Allocated memory is still 109.1 MB. Free memory was 69.3 MB in the beginning and 68.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:06,438 INFO L168 Benchmark]: RCFGBuilder took 329.66 ms. Allocated memory is still 109.1 MB. Free memory was 68.1 MB in the beginning and 71.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:06,439 INFO L168 Benchmark]: TraceAbstraction took 16531.84 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 70.6 MB in the beginning and 93.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:06,439 INFO L168 Benchmark]: Witness Printer took 4.62 ms. Allocated memory is still 136.3 MB. Free memory was 93.1 MB in the beginning and 92.4 MB in the end (delta: 753.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:07:06,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 109.1 MB. Free memory is still 86.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.75 ms. Allocated memory is still 109.1 MB. Free memory was 80.7 MB in the beginning and 70.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.41 ms. Allocated memory is still 109.1 MB. Free memory was 70.7 MB in the beginning and 69.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.49 ms. Allocated memory is still 109.1 MB. Free memory was 69.3 MB in the beginning and 68.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 329.66 ms. Allocated memory is still 109.1 MB. Free memory was 68.1 MB in the beginning and 71.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16531.84 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 70.6 MB in the beginning and 93.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.62 ms. Allocated memory is still 136.3 MB. Free memory was 93.1 MB in the beginning and 92.4 MB in the end (delta: 753.7 kB). 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 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 TRUE !(x <= X) [L48] xy = (long long) x*y [L49] yx = (long long) Y*x [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: 16.4s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 SDtfs, 47 SDslu, 19 SDs, 0 SdLazy, 78 SolverSat, 42 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s 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 12:07:07,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:07:07,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:07:07,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:07:07,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:07:07,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:07:07,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:07:07,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:07:07,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:07:07,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:07:07,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:07:07,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:07:07,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:07:07,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:07:07,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:07:07,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:07:07,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:07:07,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:07:07,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:07:07,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:07:08,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:07:08,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:07:08,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:07:08,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:07:08,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:07:08,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:07:08,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:07:08,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:07:08,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:07:08,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:07:08,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:07:08,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:07:08,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:07:08,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:07:08,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:07:08,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:07:08,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:07:08,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:07:08,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:07:08,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:07:08,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:07:08,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 12:07:08,048 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:07:08,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:07:08,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:07:08,050 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:07:08,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:07:08,050 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:07:08,050 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:07:08,051 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:07:08,051 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:07:08,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:07:08,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:07:08,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:07:08,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:07:08,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:07:08,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:07:08,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:07:08,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:07:08,053 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 12:07:08,053 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 12:07:08,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:07:08,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:07:08,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:07:08,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:07:08,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:07:08,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 12:07:08,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:07:08,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:07:08,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:07:08,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:07:08,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:07:08,056 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 12:07:08,056 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 12:07:08,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:07:08,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:07:08,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:07:08,057 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_e40bed24-be12-4a21-b556-cb93a76367f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d8c88ea116cc4d626a5309461c01e3740129b8 [2020-12-09 12:07:08,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:07:08,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:07:08,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:07:08,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:07:08,338 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:07:08,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c [2020-12-09 12:07:08,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/7a76901c3/f6f2a98fa5a34065aa15cd4b6ed0ff5d/FLAG4f32fac66 [2020-12-09 12:07:08,767 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:07:08,768 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c [2020-12-09 12:07:08,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/7a76901c3/f6f2a98fa5a34065aa15cd4b6ed0ff5d/FLAG4f32fac66 [2020-12-09 12:07:08,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/data/7a76901c3/f6f2a98fa5a34065aa15cd4b6ed0ff5d [2020-12-09 12:07:08,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:07:08,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:07:08,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:07:08,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:07:08,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:07:08,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:08,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a5292d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08, skipping insertion in model container [2020-12-09 12:07:08,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:08,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:07:08,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:07:08,906 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_e40bed24-be12-4a21-b556-cb93a76367f9/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c[597,610] [2020-12-09 12:07:08,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:07:08,939 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:07:08,953 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_e40bed24-be12-4a21-b556-cb93a76367f9/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound1.c[597,610] [2020-12-09 12:07:08,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:07:08,970 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:07:08,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08 WrapperNode [2020-12-09 12:07:08,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:07:08,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:07:08,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:07:08,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:07:08,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:08,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:08,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:07:08,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:07:08,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:07:08,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:07:09,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... [2020-12-09 12:07:09,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:07:09,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:07:09,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:07:09,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:07:09,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 12:07:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:07:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:07:09,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:07:09,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:07:09,417 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 12:07:09,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:07:09 BoogieIcfgContainer [2020-12-09 12:07:09,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:07:09,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:07:09,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:07:09,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:07:09,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:07:08" (1/3) ... [2020-12-09 12:07:09,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3107a8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:07:09, skipping insertion in model container [2020-12-09 12:07:09,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:07:08" (2/3) ... [2020-12-09 12:07:09,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3107a8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:07:09, skipping insertion in model container [2020-12-09 12:07:09,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:07:09" (3/3) ... [2020-12-09 12:07:09,423 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound1.c [2020-12-09 12:07:09,439 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:07:09,441 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 12:07:09,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 12:07:09,475 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:07:09,475 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:07:09,475 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:07:09,475 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:07:09,475 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:07:09,475 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:07:09,475 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:07:09,475 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:07:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-09 12:07:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:07:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:07:09,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:07:09,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:07:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:07:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-09 12:07:09,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:07:09,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267738762] [2020-12-09 12:07:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:07:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 12:07:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:07:09,643 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 12:07:09,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:07:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267738762] [2020-12-09 12:07:09,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:07:09,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:07:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408588847] [2020-12-09 12:07:09,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:07:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:07:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:07:09,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:07:09,659 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-09 12:07:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:07:09,670 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-09 12:07:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:07:09,671 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-09 12:07:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:07:09,677 INFO L225 Difference]: With dead ends: 39 [2020-12-09 12:07:09,677 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 12:07:09,679 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 12:07:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 12:07:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 12:07:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 12:07:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-09 12:07:09,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-12-09 12:07:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:07:09,701 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-09 12:07:09,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:07:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-09 12:07:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:07:09,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:07:09,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:07:09,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 12:07:09,904 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:07:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:07:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-09 12:07:09,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:07:09,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077743354] [2020-12-09 12:07:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:07:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 12:07:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:07:10,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:10,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:10,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 12:07:10,418 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 12:07:10,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:07:10,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077743354] [2020-12-09 12:07:10,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:07:10,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 12:07:10,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615120933] [2020-12-09 12:07:10,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 12:07:10,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:07:10,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 12:07:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:07:10,422 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-12-09 12:07:10,664 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-12-09 12:07:10,850 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-09 12:07:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:07:11,214 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-09 12:07:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 12:07:11,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-09 12:07:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:07:11,215 INFO L225 Difference]: With dead ends: 30 [2020-12-09 12:07:11,215 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 12:07:11,216 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 12:07:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 12:07:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-12-09 12:07:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 12:07:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 12:07:11,220 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-12-09 12:07:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:07:11,220 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 12:07:11,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 12:07:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 12:07:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 12:07:11,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:07:11,221 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:07:11,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 12:07:11,423 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:07:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:07:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2020-12-09 12:07:11,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:07:11,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382114206] [2020-12-09 12:07:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:07:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 12:07:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:07:11,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:11,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:11,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:11,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:11,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 12:07:11,988 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 12:07:11,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:07:12,227 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-12-09 12:07:12,228 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:07:12,426 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 12:07:12,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382114206] [2020-12-09 12:07:12,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919456318] [2020-12-09 12:07:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:07:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 12:07:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:07:13,410 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-09 12:07:13,916 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 12:07:13,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:13,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:13,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 12:07:14,012 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 12:07:14,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:07:16,588 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 12:07:18,982 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 12:07:21,744 WARN L197 SmtUtils]: Spent 993.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 12:07:24,724 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 12:07:24,740 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 12:07:24,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667901164] [2020-12-09 12:07:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/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 12:07:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:07:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 12:07:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:07:25,381 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-12-09 12:07:25,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:25,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:25,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:25,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:07:25,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 12:07:25,580 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 12:07:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:07:26,493 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:07:26,493 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:07:33,566 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 12:07:33,648 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-12-09 12:07:33,648 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:07:33,746 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 12:07:33,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:07:33,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10, 7, 9, 9] total 26 [2020-12-09 12:07:33,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372363893] [2020-12-09 12:07:33,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-09 12:07:33,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:07:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-09 12:07:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-12-09 12:07:33,750 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 26 states. [2020-12-09 12:07:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:07:33,751 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 12:07:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:07:33,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 14 [2020-12-09 12:07:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:07:33,751 INFO L225 Difference]: With dead ends: 20 [2020-12-09 12:07:33,751 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 12:07:33,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-12-09 12:07:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 12:07:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 12:07:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 12:07:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 12:07:33,753 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-12-09 12:07:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:07:33,753 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 12:07:33,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-09 12:07:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 12:07:33,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 12:07:34,354 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 12:07:34,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 12:07:34,401 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L265 CegarLoopResult]: At program point L52(lines 21 53) the Hoare annotation is: true [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L40(lines 40 45) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L258 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: false [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L262 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-12-09 12:07:34,402 INFO L258 CegarLoopResult]: At program point L14-2(lines 36 37) the Hoare annotation is: false [2020-12-09 12:07:34,403 INFO L262 CegarLoopResult]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2020-12-09 12:07:34,403 INFO L262 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-12-09 12:07:34,403 INFO L262 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-12-09 12:07:34,403 INFO L265 CegarLoopResult]: At program point L14-5(lines 13 19) the Hoare annotation is: true [2020-12-09 12:07:34,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:07:34 BoogieIcfgContainer [2020-12-09 12:07:34,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:07:34,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:07:34,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:07:34,409 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:07:34,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:07:09" (3/4) ... [2020-12-09 12:07:34,412 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 12:07:34,421 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 12:07:34,421 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 12:07:34,421 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 12:07:34,421 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 12:07:34,453 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e40bed24-be12-4a21-b556-cb93a76367f9/bin/utaipan/witness.graphml [2020-12-09 12:07:34,453 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:07:34,454 INFO L168 Benchmark]: Toolchain (without parser) took 25661.04 ms. Allocated memory was 73.4 MB in the beginning and 104.9 MB in the end (delta: 31.5 MB). Free memory was 58.5 MB in the beginning and 48.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:34,454 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 73.4 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:07:34,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.24 ms. Allocated memory is still 73.4 MB. Free memory was 58.3 MB in the beginning and 56.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:34,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.95 ms. Allocated memory is still 73.4 MB. Free memory was 56.0 MB in the beginning and 54.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:07:34,455 INFO L168 Benchmark]: Boogie Preprocessor took 18.50 ms. Allocated memory is still 73.4 MB. Free memory was 54.5 MB in the beginning and 53.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:34,455 INFO L168 Benchmark]: RCFGBuilder took 401.43 ms. Allocated memory is still 73.4 MB. Free memory was 53.2 MB in the beginning and 39.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:34,456 INFO L168 Benchmark]: TraceAbstraction took 24989.75 ms. Allocated memory was 73.4 MB in the beginning and 104.9 MB in the end (delta: 31.5 MB). Free memory was 38.7 MB in the beginning and 50.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:34,456 INFO L168 Benchmark]: Witness Printer took 43.94 ms. Allocated memory is still 104.9 MB. Free memory was 50.3 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:07:34,458 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 73.4 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 177.24 ms. Allocated memory is still 73.4 MB. Free memory was 58.3 MB in the beginning and 56.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.95 ms. Allocated memory is still 73.4 MB. Free memory was 56.0 MB in the beginning and 54.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.50 ms. Allocated memory is still 73.4 MB. Free memory was 54.5 MB in the beginning and 53.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 401.43 ms. Allocated memory is still 73.4 MB. Free memory was 53.2 MB in the beginning and 39.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24989.75 ms. Allocated memory was 73.4 MB in the beginning and 104.9 MB in the end (delta: 31.5 MB). Free memory was 38.7 MB in the beginning and 50.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. * Witness Printer took 43.94 ms. Allocated memory is still 104.9 MB. Free memory was 50.3 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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: 24.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.8s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 22.0s 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, 22.2s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 94 ConstructedInterpolants, 5 QuantifiedInterpolants, 18708 SizeOfPredicates, 57 NumberOfNonLiveVariables, 217 ConjunctsInSsa, 67 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...