./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:06:08,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:08,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:08,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:08,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:08,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:08,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:08,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:08,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:08,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:08,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:08,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:08,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:08,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:08,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:08,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:08,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:08,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:08,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:08,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:08,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:08,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:08,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:08,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:08,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:08,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:08,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:08,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:08,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:08,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:08,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:08,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:08,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:08,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:08,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:08,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:08,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:08,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:08,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:08,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:08,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:08,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:06:08,931 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:08,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:08,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:08,936 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:08,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:08,937 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:08,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:08,937 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:08,937 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:08,937 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:08,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:08,939 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:08,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:08,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:08,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:08,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:08,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:08,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:08,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:08,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:08,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:08,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:08,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:08,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:08,942 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:08,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:08,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:08,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:08,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:08,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:08,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:08,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:08,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:08,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:08,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:08,947 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:08,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:08,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:08,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:08,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:08,948 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_8b4b9148-271e-4d3d-a14a-f142b28df1b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a [2020-11-22 13:06:09,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:09,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:09,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:09,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:09,200 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:09,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-11-22 13:06:09,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/data/79fb63156/ae0b88806d8e49ecb713e3f539053731/FLAG15548e790 [2020-11-22 13:06:09,703 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:09,704 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-11-22 13:06:09,709 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/data/79fb63156/ae0b88806d8e49ecb713e3f539053731/FLAG15548e790 [2020-11-22 13:06:10,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/data/79fb63156/ae0b88806d8e49ecb713e3f539053731 [2020-11-22 13:06:10,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:10,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:10,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:10,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:10,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:10,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71eaf4e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10, skipping insertion in model container [2020-11-22 13:06:10,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:10,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:10,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:10,309 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:10,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:10,351 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:10,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10 WrapperNode [2020-11-22 13:06:10,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:10,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:10,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:10,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:10,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:10,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:10,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:10,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:10,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... [2020-11-22 13:06:10,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:10,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:10,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:10,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:10,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/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 [2020-11-22 13:06:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:06:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:10,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:11,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:11,081 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-22 13:06:11,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:11 BoogieIcfgContainer [2020-11-22 13:06:11,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:11,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:11,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:11,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:11,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:10" (1/3) ... [2020-11-22 13:06:11,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb41574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:11, skipping insertion in model container [2020-11-22 13:06:11,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:10" (2/3) ... [2020-11-22 13:06:11,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb41574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:11, skipping insertion in model container [2020-11-22 13:06:11,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:11" (3/3) ... [2020-11-22 13:06:11,098 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2020-11-22 13:06:11,109 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:11,114 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 13:06:11,126 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 13:06:11,148 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:11,148 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:11,148 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:11,148 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:11,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:11,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:11,149 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:11,149 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-22 13:06:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:06:11,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:11,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:06:11,174 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 3331724, now seen corresponding path program 1 times [2020-11-22 13:06:11,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:11,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374091032] [2020-11-22 13:06:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:11,279 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:11,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224387581] [2020-11-22 13:06:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/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 [2020-11-22 13:06:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:11,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-22 13:06:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:11,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:11,526 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:06:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:11,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374091032] [2020-11-22 13:06:11,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:11,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224387581] [2020-11-22 13:06:11,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:11,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:06:11,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329160973] [2020-11-22 13:06:11,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:06:11,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:11,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:06:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:06:11,574 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 5 states. [2020-11-22 13:06:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:13,775 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-11-22 13:06:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:06:13,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 13:06:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:13,787 INFO L225 Difference]: With dead ends: 40 [2020-11-22 13:06:13,787 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:06:13,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:06:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:06:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-11-22 13:06:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:06:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-22 13:06:13,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2020-11-22 13:06:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:13,818 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-22 13:06:13,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:06:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-22 13:06:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:06:13,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:13,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:14,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-22 13:06:14,033 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:14,034 INFO L82 PathProgramCache]: Analyzing trace with hash 325270444, now seen corresponding path program 1 times [2020-11-22 13:06:14,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:14,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391096140] [2020-11-22 13:06:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:14,053 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:14,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132947976] [2020-11-22 13:06:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/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 [2020-11-22 13:06:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-22 13:06:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:14,178 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-22 13:06:14,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:06:14,323 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-22 13:06:14,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:06:14,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:06:14,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-22 13:06:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:14,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:14,580 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:06:14,794 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-11-22 13:06:14,799 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 13:06:14,802 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:06:17,161 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 23 [2020-11-22 13:06:17,208 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 4, 1] term [2020-11-22 13:06:17,208 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:06:19,976 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 33 [2020-11-22 13:06:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:19,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391096140] [2020-11-22 13:06:19,981 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:19,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132947976] [2020-11-22 13:06:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74088476] [2020-11-22 13:06:20,004 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-22 13:06:20,004 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:20,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:20,013 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:20,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:20,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:20,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:20,664 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:21,052 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-11-22 13:06:21,250 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-11-22 13:06:21,559 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-22 13:06:21,889 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 13:06:22,188 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-11-22 13:06:22,480 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-22 13:06:22,490 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:22,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:06:22,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-11-22 13:06:22,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918578133] [2020-11-22 13:06:22,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-22 13:06:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-22 13:06:22,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:06:22,493 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2020-11-22 13:06:22,896 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-11-22 13:06:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:29,428 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-22 13:06:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 13:06:29,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2020-11-22 13:06:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:29,434 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:06:29,434 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:06:29,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2020-11-22 13:06:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:06:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-11-22 13:06:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:06:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-22 13:06:29,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2020-11-22 13:06:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:29,441 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-22 13:06:29,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-22 13:06:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-22 13:06:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:06:29,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:29,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-11-22 13:06:29,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:29,657 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash 326345900, now seen corresponding path program 1 times [2020-11-22 13:06:29,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:29,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335294949] [2020-11-22 13:06:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:29,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:29,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010454865] [2020-11-22 13:06:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/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 [2020-11-22 13:06:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:29,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-22 13:06:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:30,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:06:30,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335294949] [2020-11-22 13:06:30,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:30,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010454865] [2020-11-22 13:06:30,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767671962] [2020-11-22 13:06:30,424 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:06:30,424 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:30,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:30,425 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:30,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:30,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:30,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:30,843 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:31,066 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-11-22 13:06:31,248 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-11-22 13:06:31,450 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-22 13:06:31,614 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 13:06:31,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:31,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:06:31,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-22 13:06:31,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658803437] [2020-11-22 13:06:31,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:06:31,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:06:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:31,617 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-11-22 13:06:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:36,063 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-22 13:06:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:06:36,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-11-22 13:06:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:36,065 INFO L225 Difference]: With dead ends: 19 [2020-11-22 13:06:36,065 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 13:06:36,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:06:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 13:06:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-22 13:06:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:06:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-22 13:06:36,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-11-22 13:06:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:36,071 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-22 13:06:36,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:06:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-22 13:06:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:06:36,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:36,071 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2020-11-22 13:06:36,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:36,289 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1759972916, now seen corresponding path program 2 times [2020-11-22 13:06:36,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:36,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812245903] [2020-11-22 13:06:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:36,299 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:36,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933876866] [2020-11-22 13:06:36,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:36,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-22 13:06:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:06:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-22 13:06:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:36,566 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-22 13:06:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-22 13:06:36,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:39,187 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 14 [2020-11-22 13:06:41,257 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0_42 Int) (ULTIMATE.start_main_~y~0 Int)) (or (<= v_ULTIMATE.start_main_~x~0_42 c_ULTIMATE.start_main_~X~0) (= (+ (* 2 ULTIMATE.start_main_~y~0) (* 2 (* ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~X~0))) (* 2 (* v_ULTIMATE.start_main_~x~0_42 ULTIMATE.start_main_~y~0))) (< (+ c_ULTIMATE.start_main_~X~0 1) v_ULTIMATE.start_main_~x~0_42))) is different from true [2020-11-22 13:06:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 9 not checked. [2020-11-22 13:06:41,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812245903] [2020-11-22 13:06:41,324 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:41,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933876866] [2020-11-22 13:06:41,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:06:41,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-11-22 13:06:41,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047911453] [2020-11-22 13:06:41,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:06:41,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:06:41,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=91, Unknown=1, NotChecked=20, Total=156 [2020-11-22 13:06:41,326 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-11-22 13:06:41,588 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-11-22 13:06:46,146 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-22 13:06:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:46,266 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-22 13:06:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:06:46,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-22 13:06:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:46,272 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:06:46,272 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:06:46,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=75, Invalid=138, Unknown=1, NotChecked=26, Total=240 [2020-11-22 13:06:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:06:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:06:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:06:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:06:46,273 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-22 13:06:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:46,273 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:06:46,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:06:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:06:46,274 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:06:46,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:46,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:06:46,904 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 23 [2020-11-22 13:06:47,214 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-11-22 13:06:47,216 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-22 13:06:47,216 INFO L274 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-11-22 13:06:47,216 INFO L274 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-11-22 13:06:47,216 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~X~0 2)) (.cse1 (<= 0 ULTIMATE.start_main_~X~0)) (.cse2 (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2)) (.cse3 (* ULTIMATE.start_main_~Y~0 2))) (or (and .cse0 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 (= (+ .cse2 .cse3) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0))) (and .cse0 (<= ULTIMATE.start_main_~Y~0 2) (= ULTIMATE.start_main_~x~0 0) .cse1 (= (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) 2) ULTIMATE.start_main_~X~0) (+ .cse2 (* ULTIMATE.start_main_~y~0 2) .cse3)) (= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~Y~0)))) [2020-11-22 13:06:47,216 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:06:47,216 INFO L274 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-11-22 13:06:47,216 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-22 13:06:47,217 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:06:47,217 INFO L274 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-11-22 13:06:47,217 INFO L270 CegarLoopResult]: At program point L14-1(lines 36 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~X~0 2) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 0 ULTIMATE.start_main_~X~0) (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0))) [2020-11-22 13:06:47,217 INFO L274 CegarLoopResult]: For program point L14-2(lines 14 17) no Hoare annotation was computed. [2020-11-22 13:06:47,217 INFO L277 CegarLoopResult]: At program point L14-3(lines 13 19) the Hoare annotation is: true [2020-11-22 13:06:47,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:47 BoogieIcfgContainer [2020-11-22 13:06:47,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:47,231 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:47,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:47,231 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:47,231 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:11" (3/4) ... [2020-11-22 13:06:47,234 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:06:47,242 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-22 13:06:47,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 13:06:47,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:06:47,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:06:47,297 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8b4b9148-271e-4d3d-a14a-f142b28df1b1/bin/utaipan/witness.graphml [2020-11-22 13:06:47,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:47,301 INFO L168 Benchmark]: Toolchain (without parser) took 37218.02 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 98.3 MB in the beginning and 79.9 MB in the end (delta: 18.4 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:47,302 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 36.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:47,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.31 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 103.2 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:47,302 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.83 ms. Allocated memory is still 125.8 MB. Free memory was 103.2 MB in the beginning and 101.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:47,303 INFO L168 Benchmark]: Boogie Preprocessor took 45.92 ms. Allocated memory is still 125.8 MB. Free memory was 101.8 MB in the beginning and 100.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:47,305 INFO L168 Benchmark]: RCFGBuilder took 625.68 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 77.7 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:47,305 INFO L168 Benchmark]: TraceAbstraction took 36145.21 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 77.0 MB in the beginning and 82.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:47,306 INFO L168 Benchmark]: Witness Printer took 69.43 ms. Allocated memory is still 151.0 MB. Free memory was 82.0 MB in the beginning and 79.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:47,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 36.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.31 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 103.2 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.83 ms. Allocated memory is still 125.8 MB. Free memory was 103.2 MB in the beginning and 101.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.92 ms. Allocated memory is still 125.8 MB. Free memory was 101.8 MB in the beginning and 100.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 625.68 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 77.7 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 36145.21 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 77.0 MB in the beginning and 82.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * Witness Printer took 69.43 ms. Allocated memory is still 151.0 MB. Free memory was 82.0 MB in the beginning and 79.9 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: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((X <= 2 && 1 == cond) && x <= X + 1) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((X <= 2 && x <= X + 1) && 1 <= cond) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) || ((((((X <= 2 && Y <= 2) && x == 0) && 0 <= X) && v + x * y * 2 + X == x * Y * 2 + y * 2 + Y * 2) && y == 0) && 0 <= Y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 35.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 64 SDslu, 50 SDs, 0 SdLazy, 143 SolverSat, 50 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 16.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 108 HoareAnnotationTreeSize, 3 FomulaSimplifications, 308 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 242 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 72 ConstructedInterpolants, 10 QuantifiedInterpolants, 17829 SizeOfPredicates, 65 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 33/56 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...