./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.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_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/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 8ea3cfac41e08dd5e08ea3d6d4b47f07715ae432 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:37:16,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:16,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:16,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:16,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:16,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:16,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:16,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:16,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:16,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:16,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:16,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:16,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:16,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:16,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:16,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:16,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:16,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:16,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:16,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:16,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:16,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:16,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:16,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:16,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:16,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:16,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:16,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:16,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:16,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:16,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:16,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:16,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:16,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:16,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:16,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:16,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:16,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:16,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:16,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:16,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:16,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:37:16,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:16,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:16,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:16,726 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:16,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:16,727 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:16,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:16,727 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:16,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:16,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:16,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:16,729 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:16,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:16,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:16,730 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:16,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:16,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:37:16,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:16,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:37:16,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:16,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:37:16,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:16,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:37:16,732 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:37:16,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:37:16,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:37:16,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:16,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:37:16,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:16,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:16,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:16,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:16,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:16,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:16,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:37:16,737 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:16,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:16,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:37:16,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:16,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:16,738 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_f24c761c-68b6-4a26-8778-48f30f48d1f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ea3cfac41e08dd5e08ea3d6d4b47f07715ae432 [2020-11-28 07:37:17,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:17,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:17,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:17,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:17,083 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:17,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.c [2020-11-28 07:37:17,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/data/5736b118a/4243d1bab9b14936859bfc89b9e5ae22/FLAG3f64a6c8d [2020-11-28 07:37:17,627 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:37:17,629 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.c [2020-11-28 07:37:17,642 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/data/5736b118a/4243d1bab9b14936859bfc89b9e5ae22/FLAG3f64a6c8d [2020-11-28 07:37:17,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/data/5736b118a/4243d1bab9b14936859bfc89b9e5ae22 [2020-11-28 07:37:17,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:37:17,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:37:17,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:17,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:37:18,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:37:18,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:18,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d0c860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18, skipping insertion in model container [2020-11-28 07:37:18,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:18,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:37:18,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:37:18,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:18,221 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:37:18,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:18,255 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:37:18,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18 WrapperNode [2020-11-28 07:37:18,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:18,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:18,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:37:18,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:37:18,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:18,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:37:18,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:37:18,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:37:18,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... [2020-11-28 07:37:18,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:37:18,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:37:18,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:37:18,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:37:18,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/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 [2020-11-28 07:37:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:37:18,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:37:18,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:37:18,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:37:18,951 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:37:18,952 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-28 07:37:18,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:18 BoogieIcfgContainer [2020-11-28 07:37:18,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:37:18,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:37:18,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:37:18,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:37:18,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:37:17" (1/3) ... [2020-11-28 07:37:18,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c73b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:18, skipping insertion in model container [2020-11-28 07:37:18,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:18" (2/3) ... [2020-11-28 07:37:18,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c73b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:18, skipping insertion in model container [2020-11-28 07:37:18,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:18" (3/3) ... [2020-11-28 07:37:18,962 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound5.c [2020-11-28 07:37:18,974 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:37:18,979 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:37:18,996 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:37:19,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:37:19,019 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:37:19,019 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:37:19,020 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:37:19,020 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:37:19,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:37:19,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:37:19,020 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:37:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 07:37:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:37:19,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:19,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:37:19,036 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:19,042 INFO L82 PathProgramCache]: Analyzing trace with hash 3331724, now seen corresponding path program 1 times [2020-11-28 07:37:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:19,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312893521] [2020-11-28 07:37:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:19,147 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:37:19,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329846511] [2020-11-28 07:37:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/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 [2020-11-28 07:37:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 07:37:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:19,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:19,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:37:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:19,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312893521] [2020-11-28 07:37:19,385 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:19,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329846511] [2020-11-28 07:37:19,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:19,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:37:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625843258] [2020-11-28 07:37:19,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:37:19,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:19,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:37:19,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:19,415 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 5 states. [2020-11-28 07:37:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:21,625 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-11-28 07:37:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:37:21,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-28 07:37:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:21,637 INFO L225 Difference]: With dead ends: 40 [2020-11-28 07:37:21,638 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:37:21,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:37:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-11-28 07:37:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:37:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 07:37:21,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2020-11-28 07:37:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:21,693 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 07:37:21,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:37:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 07:37:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:37:21,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:21,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:21,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:37:21,907 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:21,908 INFO L82 PathProgramCache]: Analyzing trace with hash 325270444, now seen corresponding path program 1 times [2020-11-28 07:37:21,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:21,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327358943] [2020-11-28 07:37:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:21,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:37:21,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210255509] [2020-11-28 07:37:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/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 [2020-11-28 07:37:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-28 07:37:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:22,030 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-28 07:37:22,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:37:22,194 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 07:37:22,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:37:22,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:37:22,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:37:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:22,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:22,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:37:22,619 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:37:22,619 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:37:22,991 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-28 07:37:23,039 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 4, 1] term [2020-11-28 07:37:23,039 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:37:23,503 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-11-28 07:37:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:23,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327358943] [2020-11-28 07:37:23,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:23,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210255509] [2020-11-28 07:37:23,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207155665] [2020-11-28 07:37:23,543 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-28 07:37:23,543 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:23,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:23,557 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:23,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:23,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:23,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:24,329 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:24,685 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-11-28 07:37:24,938 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-11-28 07:37:25,159 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-28 07:37:25,394 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-28 07:37:25,607 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-11-28 07:37:25,933 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-11-28 07:37:25,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:25,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:37:25,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-11-28 07:37:25,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96218849] [2020-11-28 07:37:25,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:37:25,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:37:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:37:25,938 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2020-11-28 07:37:26,338 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-11-28 07:37:26,522 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2020-11-28 07:37:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:32,056 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-28 07:37:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:37:32,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2020-11-28 07:37:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:32,067 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:37:32,067 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:37:32,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2020-11-28 07:37:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:37:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-11-28 07:37:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:37:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-28 07:37:32,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2020-11-28 07:37:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:32,074 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-28 07:37:32,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:37:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-28 07:37:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:37:32,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:32,075 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-11-28 07:37:32,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:32,275 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash 326345900, now seen corresponding path program 1 times [2020-11-28 07:37:32,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:32,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130890384] [2020-11-28 07:37:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:32,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:37:32,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279292094] [2020-11-28 07:37:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/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 [2020-11-28 07:37:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 07:37:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:32,639 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-11-28 07:37:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:32,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:33,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130890384] [2020-11-28 07:37:33,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:33,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279292094] [2020-11-28 07:37:33,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802686100] [2020-11-28 07:37:33,141 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:37:33,141 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:33,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:33,141 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:33,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:33,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:33,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:33,439 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:33,636 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-11-28 07:37:33,775 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-11-28 07:37:33,942 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-28 07:37:34,097 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-28 07:37:34,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:34,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:37:34,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-28 07:37:34,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043153282] [2020-11-28 07:37:34,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:37:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:37:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:37:34,100 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2020-11-28 07:37:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:36,646 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-28 07:37:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:37:36,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-11-28 07:37:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:36,647 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:37:36,647 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 07:37:36,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:37:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 07:37:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 07:37:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 07:37:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-28 07:37:36,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-11-28 07:37:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:36,654 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-28 07:37:36,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:37:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-28 07:37:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:37:36,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:36,655 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2020-11-28 07:37:36,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-28 07:37:36,867 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:36,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1759972916, now seen corresponding path program 2 times [2020-11-28 07:37:36,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:36,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92903365] [2020-11-28 07:37:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:36,886 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:37:36,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608258288] [2020-11-28 07:37:36,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/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 [2020-11-28 07:37:37,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:37:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 07:37:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:37,566 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2020-11-28 07:37:37,790 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 1 [2020-11-28 07:37:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 07:37:37,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:39,864 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-28 07:37:41,955 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0_43 Int) (ULTIMATE.start_main_~y~0 Int)) (or (< (+ c_ULTIMATE.start_main_~X~0 1) v_ULTIMATE.start_main_~x~0_43) (= (* 2 (* v_ULTIMATE.start_main_~x~0_43 ULTIMATE.start_main_~y~0)) (+ (* 2 ULTIMATE.start_main_~y~0) (* 2 (* ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~X~0)))) (<= v_ULTIMATE.start_main_~x~0_43 c_ULTIMATE.start_main_~X~0))) is different from true [2020-11-28 07:37:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 9 not checked. [2020-11-28 07:37:42,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92903365] [2020-11-28 07:37:42,008 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:42,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608258288] [2020-11-28 07:37:42,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:37:42,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-11-28 07:37:42,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317102862] [2020-11-28 07:37:42,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:37:42,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:37:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=91, Unknown=1, NotChecked=20, Total=156 [2020-11-28 07:37:42,010 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-11-28 07:37:46,643 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-28 07:37:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:47,217 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-28 07:37:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:37:47,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-28 07:37:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:47,226 INFO L225 Difference]: With dead ends: 17 [2020-11-28 07:37:47,226 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:37:47,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=75, Invalid=138, Unknown=1, NotChecked=26, Total=240 [2020-11-28 07:37:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:37:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:37:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:37:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:37:47,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-28 07:37:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:47,227 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:37:47,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:37:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:37:47,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:37:47,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:47,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:37:47,609 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-11-28 07:37:47,941 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2020-11-28 07:37:47,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-28 07:37:47,944 INFO L274 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-11-28 07:37:47,944 INFO L274 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-11-28 07:37:47,944 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= 0 ULTIMATE.start_main_~X~0)) (.cse1 (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2)) (.cse2 (* ULTIMATE.start_main_~Y~0 2)) (.cse3 (<= ULTIMATE.start_main_~X~0 5))) (or (and (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 (= (+ .cse1 .cse2) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0)) .cse3) (and (<= ULTIMATE.start_main_~Y~0 5) (= ULTIMATE.start_main_~x~0 0) .cse0 (= (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) 2) ULTIMATE.start_main_~X~0) (+ .cse1 (* ULTIMATE.start_main_~y~0 2) .cse2)) (= ULTIMATE.start_main_~y~0 0) .cse3 (<= 0 ULTIMATE.start_main_~Y~0)))) [2020-11-28 07:37:47,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:37:47,944 INFO L274 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-11-28 07:37:47,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-28 07:37:47,945 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:37:47,945 INFO L274 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-11-28 07:37:47,945 INFO L270 CegarLoopResult]: At program point L14-1(lines 36 37) the Hoare annotation is: (and (= 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)) (<= ULTIMATE.start_main_~X~0 5)) [2020-11-28 07:37:47,945 INFO L274 CegarLoopResult]: For program point L14-2(lines 14 17) no Hoare annotation was computed. [2020-11-28 07:37:47,945 INFO L277 CegarLoopResult]: At program point L14-3(lines 13 19) the Hoare annotation is: true [2020-11-28 07:37:47,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:37:47 BoogieIcfgContainer [2020-11-28 07:37:47,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:37:47,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:37:47,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:37:47,965 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:37:47,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:18" (3/4) ... [2020-11-28 07:37:47,967 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:37:47,975 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-28 07:37:47,975 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:37:47,975 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:37:47,975 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:37:48,023 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f24c761c-68b6-4a26-8778-48f30f48d1f5/bin/utaipan/witness.graphml [2020-11-28 07:37:48,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:37:48,028 INFO L168 Benchmark]: Toolchain (without parser) took 30030.85 ms. Allocated memory was 86.0 MB in the beginning and 142.6 MB in the end (delta: 56.6 MB). Free memory was 53.5 MB in the beginning and 102.4 MB in the end (delta: -48.9 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:48,028 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 57.6 MB in the end (delta: 28.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:48,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.49 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 53.3 MB in the beginning and 94.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:48,031 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.69 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 92.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:48,032 INFO L168 Benchmark]: Boogie Preprocessor took 23.25 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.7 MB in the end (delta: 859.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:48,032 INFO L168 Benchmark]: RCFGBuilder took 622.78 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 68.0 MB in the end (delta: 23.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:48,032 INFO L168 Benchmark]: TraceAbstraction took 29008.83 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 68.0 MB in the beginning and 105.6 MB in the end (delta: -37.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:48,033 INFO L168 Benchmark]: Witness Printer took 62.01 ms. Allocated memory is still 142.6 MB. Free memory was 105.6 MB in the beginning and 102.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:48,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 57.6 MB in the end (delta: 28.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.49 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 53.3 MB in the beginning and 94.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.69 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 92.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.25 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.7 MB in the end (delta: 859.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 622.78 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 68.0 MB in the end (delta: 23.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29008.83 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 68.0 MB in the beginning and 105.6 MB in the end (delta: -37.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. * Witness Printer took 62.01 ms. Allocated memory is still 142.6 MB. Free memory was 105.6 MB in the beginning and 102.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: (((1 == cond && x <= X + 1) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && X <= 5 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((x <= X + 1 && 1 <= cond) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && X <= 5) || ((((((Y <= 5 && x == 0) && 0 <= X) && v + x * y * 2 + X == x * Y * 2 + y * 2 + Y * 2) && y == 0) && X <= 5) && 0 <= Y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.4s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 16.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 66 SDslu, 49 SDs, 0 SdLazy, 132 SolverSat, 49 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 9.8s 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, 429 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 161 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 40 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 72 ConstructedInterpolants, 10 QuantifiedInterpolants, 18720 SizeOfPredicates, 56 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 32/56 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...