./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.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_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/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 3c758affe4a0bff63c925ec1500c02afafd4840e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:06:03,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:03,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:03,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:03,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:03,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:03,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:03,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:03,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:03,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:03,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:03,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:03,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:03,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:03,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:03,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:03,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:03,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:03,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:03,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:03,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:03,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:03,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:03,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:03,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:03,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:03,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:03,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:03,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:03,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:03,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:03,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:03,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:03,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:03,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:03,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:03,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:03,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:03,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:03,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:03,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:03,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:06:03,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:03,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:03,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:03,233 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:03,234 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:03,234 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:03,234 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:03,234 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:03,234 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:03,235 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:03,235 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:03,235 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:03,235 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:03,236 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:03,236 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:03,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:03,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:03,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:03,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:03,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:03,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:03,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:03,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:03,238 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:03,239 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:03,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:03,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:03,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:03,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:03,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:03,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:03,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:03,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:03,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:03,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:03,241 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:03,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:03,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:03,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:03,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:03,242 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_7be04211-ab36-4d97-b14b-be92f783c527/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c758affe4a0bff63c925ec1500c02afafd4840e [2020-11-22 13:06:03,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:03,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:03,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:03,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:03,575 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:03,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2020-11-22 13:06:03,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/data/60abec153/acfbece098264cd2af7a8d0f29627617/FLAG5682a5cc7 [2020-11-22 13:06:04,224 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:04,225 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2020-11-22 13:06:04,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/data/60abec153/acfbece098264cd2af7a8d0f29627617/FLAG5682a5cc7 [2020-11-22 13:06:04,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/data/60abec153/acfbece098264cd2af7a8d0f29627617 [2020-11-22 13:06:04,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:04,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:04,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:04,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:04,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:04,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f3707e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04, skipping insertion in model container [2020-11-22 13:06:04,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:04,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:04,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:04,896 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:04,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:04,931 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:04,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04 WrapperNode [2020-11-22 13:06:04,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:04,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:04,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:04,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:04,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:04,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:04,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:04,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:04,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... [2020-11-22 13:06:04,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:04,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:04,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:04,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:04,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/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 13:06:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:06:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:05,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:05,608 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:05,608 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-22 13:06:05,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:05 BoogieIcfgContainer [2020-11-22 13:06:05,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:05,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:05,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:05,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:05,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:04" (1/3) ... [2020-11-22 13:06:05,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e42f4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:05, skipping insertion in model container [2020-11-22 13:06:05,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:04" (2/3) ... [2020-11-22 13:06:05,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e42f4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:05, skipping insertion in model container [2020-11-22 13:06:05,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:05" (3/3) ... [2020-11-22 13:06:05,624 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2020-11-22 13:06:05,637 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:05,642 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 13:06:05,654 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 13:06:05,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:05,689 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:05,689 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:05,690 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:05,690 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:05,690 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:05,690 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:05,690 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-22 13:06:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:06:05,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:05,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:06:05,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash 80563898, now seen corresponding path program 1 times [2020-11-22 13:06:05,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:05,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461346506] [2020-11-22 13:06:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:05,900 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 13:06:05,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461346506] [2020-11-22 13:06:05,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:05,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:05,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577348965] [2020-11-22 13:06:05,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:06:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:06:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:05,927 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-22 13:06:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:05,943 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-22 13:06:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:06:05,944 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 13:06:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:05,954 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:06:05,954 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 13:06:05,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 13:06:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 13:06:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 13:06:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-22 13:06:05,988 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-11-22 13:06:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:05,990 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-22 13:06:05,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:06:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-22 13:06:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:06:05,991 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:05,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:06:05,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:06:05,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash 79643357, now seen corresponding path program 1 times [2020-11-22 13:06:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:05,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122345072] [2020-11-22 13:06:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:06,028 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:06,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258762259] [2020-11-22 13:06:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/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 13:06:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:06,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:06:06,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:06,197 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 13:06:06,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:06,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:06:06,234 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 13:06:06,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122345072] [2020-11-22 13:06:06,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:06,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258762259] [2020-11-22 13:06:06,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:06,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:06:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841018475] [2020-11-22 13:06:06,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:06:06,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:06,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:06:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:06:06,238 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-22 13:06:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:08,513 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-22 13:06:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:06:08,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 13:06:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:08,515 INFO L225 Difference]: With dead ends: 33 [2020-11-22 13:06:08,515 INFO L226 Difference]: Without dead ends: 26 [2020-11-22 13:06:08,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 13:06:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-22 13:06:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-11-22 13:06:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 13:06:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-22 13:06:08,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 5 [2020-11-22 13:06:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:08,522 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-22 13:06:08,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:06:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-22 13:06:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:06:08,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:08,523 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:08,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 13:06:08,740 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1161392796, now seen corresponding path program 1 times [2020-11-22 13:06:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:08,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986294446] [2020-11-22 13:06:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:08,756 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:08,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794928914] [2020-11-22 13:06:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/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 13:06:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 13:06:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:08,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:08,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986294446] [2020-11-22 13:06:08,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:08,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794928914] [2020-11-22 13:06:08,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891588333] [2020-11-22 13:06:08,951 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:06:08,951 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:08,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:08,961 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:08,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:09,353 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-11-22 13:06:09,862 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:10,241 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 13:06:10,371 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 13:06:10,522 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 13:06:10,685 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 13:06:10,908 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 13:06:11,071 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-11-22 13:06:11,703 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 13:06:11,705 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:11,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:06:11,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-22 13:06:11,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136504794] [2020-11-22 13:06:11,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:06:11,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:06:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:11,707 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-11-22 13:06:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:11,810 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-11-22 13:06:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-22 13:06:11,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-11-22 13:06:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:11,811 INFO L225 Difference]: With dead ends: 39 [2020-11-22 13:06:11,811 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 13:06:11,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-22 13:06:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 13:06:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-11-22 13:06:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:06:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-22 13:06:11,821 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2020-11-22 13:06:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:11,821 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-22 13:06:11,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:06:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-22 13:06:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:06:11,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:11,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:12,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:12,045 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash 633174813, now seen corresponding path program 1 times [2020-11-22 13:06:12,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:12,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422682094] [2020-11-22 13:06:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:12,058 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:12,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807153647] [2020-11-22 13:06:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/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 13:06:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:12,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-22 13:06:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:12,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:13,383 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-22 13:06:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:13,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422682094] [2020-11-22 13:06:13,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:13,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807153647] [2020-11-22 13:06:13,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:06:13,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-11-22 13:06:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025133260] [2020-11-22 13:06:13,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:06:13,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:06:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:06:13,451 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-11-22 13:06:16,933 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-22 13:06:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:17,048 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-22 13:06:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:06:17,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-22 13:06:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:17,050 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:06:17,050 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:06:17,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2020-11-22 13:06:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:06:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-22 13:06:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:06:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-22 13:06:17,059 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2020-11-22 13:06:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:17,059 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-22 13:06:17,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:06:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-22 13:06:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:06:17,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:17,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-11-22 13:06:17,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-22 13:06:17,285 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1816000587, now seen corresponding path program 1 times [2020-11-22 13:06:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537280940] [2020-11-22 13:06:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:17,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:17,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331061208] [2020-11-22 13:06:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/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 13:06:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-22 13:06:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:17,694 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-11-22 13:06:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:17,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:06:18,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537280940] [2020-11-22 13:06:18,128 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:18,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331061208] [2020-11-22 13:06:18,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26462297] [2020-11-22 13:06:18,130 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:06:18,131 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:18,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:18,131 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:18,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:18,462 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:18,661 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-11-22 13:06:18,820 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 13:06:19,152 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 13:06:19,330 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 13:06:19,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:06:19,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-11-22 13:06:19,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146605644] [2020-11-22 13:06:19,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 13:06:19,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:19,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 13:06:19,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:19,334 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2020-11-22 13:06:19,645 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-22 13:06:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:23,890 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-22 13:06:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:06:23,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-22 13:06:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:23,892 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:06:23,892 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:06:23,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:06:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:06:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-22 13:06:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:06:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-22 13:06:23,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 13 [2020-11-22 13:06:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:23,897 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-22 13:06:23,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 13:06:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-22 13:06:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 13:06:23,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:23,897 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-22 13:06:24,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-22 13:06:24,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1884262816, now seen corresponding path program 2 times [2020-11-22 13:06:24,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:24,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379815230] [2020-11-22 13:06:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:24,144 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:24,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756579981] [2020-11-22 13:06:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:29,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-22 13:06:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:06:29,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 13:06:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:29,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:29,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379815230] [2020-11-22 13:06:29,492 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:29,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756579981] [2020-11-22 13:06:29,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091438854] [2020-11-22 13:06:29,495 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:06:29,495 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:29,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:29,496 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:29,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:29,867 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:30,403 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 13:06:30,633 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 13:06:30,957 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 13:06:31,168 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 13:06:31,295 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-11-22 13:06:32,175 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 13:06:32,176 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:32,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:06:32,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-22 13:06:32,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573963462] [2020-11-22 13:06:32,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:06:32,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:32,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:06:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:32,178 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2020-11-22 13:06:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:32,292 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-11-22 13:06:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 13:06:32,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-22 13:06:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:32,293 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:06:32,293 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 13:06:32,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:06:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 13:06:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-22 13:06:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-22 13:06:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-22 13:06:32,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2020-11-22 13:06:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:32,301 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-22 13:06:32,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:06:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-22 13:06:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-22 13:06:32,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:32,302 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1] [2020-11-22 13:06:32,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-22 13:06:32,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -382539340, now seen corresponding path program 3 times [2020-11-22 13:06:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:32,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157353735] [2020-11-22 13:06:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:32,523 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:06:32,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881674933] [2020-11-22 13:06:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:32,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 13:06:32,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-22 13:06:32,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:32,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:33,025 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:06:33,026 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:06:33,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:33,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:33 BoogieIcfgContainer [2020-11-22 13:06:33,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:33,281 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:33,281 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:33,281 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:33,281 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:05" (3/4) ... [2020-11-22 13:06:33,283 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:06:33,349 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7be04211-ab36-4d97-b14b-be92f783c527/bin/utaipan/witness.graphml [2020-11-22 13:06:33,350 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:33,351 INFO L168 Benchmark]: Toolchain (without parser) took 28771.03 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 77.0 MB in the beginning and 72.1 MB in the end (delta: 4.9 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:33,351 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 79.7 MB. Free memory was 41.8 MB in the beginning and 41.8 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:33,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.20 ms. Allocated memory is still 107.0 MB. Free memory was 76.7 MB in the beginning and 83.8 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:33,352 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.62 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 82.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:33,353 INFO L168 Benchmark]: Boogie Preprocessor took 19.37 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 81.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:33,353 INFO L168 Benchmark]: RCFGBuilder took 616.29 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 64.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:33,354 INFO L168 Benchmark]: TraceAbstraction took 27667.42 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 63.6 MB in the beginning and 75.2 MB in the end (delta: -11.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:33,355 INFO L168 Benchmark]: Witness Printer took 69.01 ms. Allocated memory is still 157.3 MB. Free memory was 75.2 MB in the beginning and 72.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:33,357 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 79.7 MB. Free memory was 41.8 MB in the beginning and 41.8 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.20 ms. Allocated memory is still 107.0 MB. Free memory was 76.7 MB in the beginning and 83.8 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.62 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 82.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.37 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 81.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 616.29 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 64.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27667.42 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 63.6 MB in the beginning and 75.2 MB in the end (delta: -11.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. * Witness Printer took 69.01 ms. Allocated memory is still 157.3 MB. Free memory was 75.2 MB in the beginning and 72.1 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: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND FALSE !(counter++<5) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=6] [L7] __assert_fail("0", "bresenham-ll.c", 7, "reach_error") VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.5s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 84 SDslu, 125 SDs, 0 SdLazy, 112 SolverSat, 33 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, 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, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 13981 SizeOfPredicates, 46 NumberOfNonLiveVariables, 449 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 13/96 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 incorrect! Received shutdown request...