./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.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_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c -s /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 7a18a16e6e90efc893cf92bbdf7438c312486863 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:30:40,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:30:40,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:30:40,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:30:40,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:30:40,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:30:40,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:30:40,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:30:40,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:30:40,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:30:40,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:30:40,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:30:40,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:30:40,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:30:40,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:30:40,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:30:40,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:30:40,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:30:40,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:30:40,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:30:40,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:30:40,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:30:40,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:30:40,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:30:40,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:30:40,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:30:40,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:30:40,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:30:40,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:30:40,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:30:40,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:30:40,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:30:40,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:30:40,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:30:40,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:30:40,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:30:40,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:30:40,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:30:40,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:30:40,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:30:40,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:30:40,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:30:40,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:30:40,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:30:40,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:30:40,297 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:30:40,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:30:40,297 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:30:40,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:30:40,298 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:30:40,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:30:40,298 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:30:40,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:30:40,300 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:30:40,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:30:40,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:30:40,301 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:30:40,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:30:40,302 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:30:40,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:30:40,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:30:40,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:30:40,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:30:40,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:30:40,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:30:40,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:30:40,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:30:40,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:30:40,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:30:40,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:30:40,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:30:40,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:30:40,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:30:40,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:30:40,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:30:40,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:30:40,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:30:40,306 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:30:40,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:30:40,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:30:40,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:30:40,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:30:40,307 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_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18a16e6e90efc893cf92bbdf7438c312486863 [2020-11-28 07:30:40,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:30:40,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:30:40,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:30:40,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:30:40,615 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:30:40,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2020-11-28 07:30:40,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/data/a75845f94/4109b7ab96414deebbd26ccb50167253/FLAG1da1542a4 [2020-11-28 07:30:41,233 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:30:41,233 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2020-11-28 07:30:41,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/data/a75845f94/4109b7ab96414deebbd26ccb50167253/FLAG1da1542a4 [2020-11-28 07:30:41,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/data/a75845f94/4109b7ab96414deebbd26ccb50167253 [2020-11-28 07:30:41,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:30:41,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:30:41,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:41,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:30:41,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:30:41,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad3e815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41, skipping insertion in model container [2020-11-28 07:30:41,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:30:41,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:30:41,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:41,864 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:30:41,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:41,895 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:30:41,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41 WrapperNode [2020-11-28 07:30:41,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:41,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:41,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:30:41,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:30:41,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:41,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:30:41,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:30:41,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:30:41,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... [2020-11-28 07:30:41,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:30:41,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:30:41,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:30:41,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:30:41,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 07:30:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:30:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:30:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:30:42,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:30:42,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:30:42,448 INFO L298 CfgBuilder]: Removed 36 assume(true) statements. [2020-11-28 07:30:42,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:42 BoogieIcfgContainer [2020-11-28 07:30:42,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:30:42,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:30:42,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:30:42,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:30:42,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:30:41" (1/3) ... [2020-11-28 07:30:42,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee47452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:42, skipping insertion in model container [2020-11-28 07:30:42,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:41" (2/3) ... [2020-11-28 07:30:42,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee47452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:42, skipping insertion in model container [2020-11-28 07:30:42,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:42" (3/3) ... [2020-11-28 07:30:42,470 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.c [2020-11-28 07:30:42,484 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:30:42,488 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 07:30:42,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:30:42,521 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:30:42,522 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:30:42,522 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:30:42,522 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:30:42,522 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:30:42,522 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:30:42,523 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:30:42,523 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:30:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-28 07:30:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:30:42,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:42,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:30:42,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 159617293, now seen corresponding path program 1 times [2020-11-28 07:30:42,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:42,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725919935] [2020-11-28 07:30:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:42,740 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 07:30:42,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725919935] [2020-11-28 07:30:42,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:42,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:30:42,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664956160] [2020-11-28 07:30:42,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:30:42,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:30:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:30:42,772 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-11-28 07:30:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:42,796 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2020-11-28 07:30:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:30:42,798 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:30:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:42,820 INFO L225 Difference]: With dead ends: 71 [2020-11-28 07:30:42,836 INFO L226 Difference]: Without dead ends: 34 [2020-11-28 07:30:42,840 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 [2020-11-28 07:30:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-28 07:30:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-28 07:30:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 07:30:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-28 07:30:42,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 5 [2020-11-28 07:30:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:42,876 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-28 07:30:42,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:30:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-28 07:30:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:30:42,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:42,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:30:42,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:30:42,878 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash 156511088, now seen corresponding path program 1 times [2020-11-28 07:30:42,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:42,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771150029] [2020-11-28 07:30:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:42,919 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:42,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750828544] [2020-11-28 07:30:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 07:30:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:30:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:43,098 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 07:30:43,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:43,118 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:43,137 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 07:30:43,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771150029] [2020-11-28 07:30:43,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:43,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750828544] [2020-11-28 07:30:43,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:43,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:30:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262219331] [2020-11-28 07:30:43,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:30:43,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:30:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:30:43,142 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-11-28 07:30:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:45,413 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-11-28 07:30:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:30:45,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:30:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:45,418 INFO L225 Difference]: With dead ends: 85 [2020-11-28 07:30:45,418 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 07:30:45,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 07:30:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 07:30:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-11-28 07:30:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 07:30:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-28 07:30:45,440 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 5 [2020-11-28 07:30:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:45,442 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-28 07:30:45,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:30:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-28 07:30:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:30:45,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:45,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:30:45,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:30:45,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash 556911243, now seen corresponding path program 1 times [2020-11-28 07:30:45,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:45,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058984226] [2020-11-28 07:30:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:45,663 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:45,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623311196] [2020-11-28 07:30:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 07:30:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:30:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:45,751 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 07:30:45,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:45,773 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 07:30:45,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058984226] [2020-11-28 07:30:45,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:45,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623311196] [2020-11-28 07:30:45,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:45,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:30:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610858884] [2020-11-28 07:30:45,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:30:45,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:30:45,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:30:45,776 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-11-28 07:30:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:45,811 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-28 07:30:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:30:45,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:30:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:45,813 INFO L225 Difference]: With dead ends: 64 [2020-11-28 07:30:45,813 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 07:30:45,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:30:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 07:30:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-28 07:30:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:30:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-28 07:30:45,823 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-28 07:30:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:45,823 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-28 07:30:45,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:30:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-28 07:30:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:30:45,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:45,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:46,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:46,041 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 83486771, now seen corresponding path program 1 times [2020-11-28 07:30:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:46,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650885240] [2020-11-28 07:30:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:46,054 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:46,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823057864] [2020-11-28 07:30:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 07:30:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:30:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:46,200 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 07:30:46,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:46,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:46,229 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 07:30:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650885240] [2020-11-28 07:30:46,230 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823057864] [2020-11-28 07:30:46,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:46,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:30:46,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463315169] [2020-11-28 07:30:46,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:30:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:30:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:30:46,232 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-11-28 07:30:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:46,415 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-28 07:30:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:30:46,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 07:30:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:46,418 INFO L225 Difference]: With dead ends: 92 [2020-11-28 07:30:46,418 INFO L226 Difference]: Without dead ends: 84 [2020-11-28 07:30:46,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:30:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-28 07:30:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-11-28 07:30:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 07:30:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-11-28 07:30:46,441 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 7 [2020-11-28 07:30:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:46,441 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-11-28 07:30:46,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:30:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-11-28 07:30:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:30:46,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:46,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:46,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:46,649 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -608980738, now seen corresponding path program 1 times [2020-11-28 07:30:46,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:46,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123807539] [2020-11-28 07:30:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:46,663 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656435709] [2020-11-28 07:30:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 07:30:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:46,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:30:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:46,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:46,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123807539] [2020-11-28 07:30:46,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656435709] [2020-11-28 07:30:46,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:46,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-28 07:30:46,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056892443] [2020-11-28 07:30:46,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:30:46,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:30:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:30:46,803 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 8 states. [2020-11-28 07:30:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:46,900 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-11-28 07:30:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:30:46,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-28 07:30:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:46,903 INFO L225 Difference]: With dead ends: 156 [2020-11-28 07:30:46,903 INFO L226 Difference]: Without dead ends: 110 [2020-11-28 07:30:46,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:30:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-28 07:30:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-11-28 07:30:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-28 07:30:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-11-28 07:30:46,935 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 15 [2020-11-28 07:30:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:46,936 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-11-28 07:30:46,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:30:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-11-28 07:30:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:30:46,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:46,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:47,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:47,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -126968315, now seen corresponding path program 1 times [2020-11-28 07:30:47,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:47,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369546993] [2020-11-28 07:30:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:47,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:47,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660916603] [2020-11-28 07:30:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 [2020-11-28 07:30:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:30:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:47,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:30:47,287 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 07:30:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:47,300 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:47,328 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 07:30:47,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369546993] [2020-11-28 07:30:47,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:47,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660916603] [2020-11-28 07:30:47,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:47,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-28 07:30:47,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833104634] [2020-11-28 07:30:47,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:30:47,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:30:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:30:47,330 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 7 states. [2020-11-28 07:30:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:47,433 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-11-28 07:30:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:30:47,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 07:30:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:47,435 INFO L225 Difference]: With dead ends: 101 [2020-11-28 07:30:47,435 INFO L226 Difference]: Without dead ends: 99 [2020-11-28 07:30:47,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:30:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-28 07:30:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-11-28 07:30:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-28 07:30:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-11-28 07:30:47,456 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 15 [2020-11-28 07:30:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:47,456 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-11-28 07:30:47,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:30:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-11-28 07:30:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:30:47,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:47,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:47,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 07:30:47,673 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -14347308, now seen corresponding path program 1 times [2020-11-28 07:30:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:47,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133919343] [2020-11-28 07:30:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:47,684 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:47,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190507283] [2020-11-28 07:30:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/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 [2020-11-28 07:30:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 07:30:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:47,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:30:47,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:30:47,853 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 07:30:47,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:47,865 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:30:47,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133919343] [2020-11-28 07:30:47,903 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:47,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190507283] [2020-11-28 07:30:47,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18259489] [2020-11-28 07:30:47,928 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-11-28 07:30:47,928 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:30:47,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:30:47,942 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:30:47,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:30:48,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:30:48,930 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:30:49,191 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-11-28 07:30:49,531 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-28 07:30:49,889 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-11-28 07:30:50,311 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-11-28 07:30:51,142 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-11-28 07:30:51,686 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-11-28 07:30:52,253 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-28 07:30:53,018 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-11-28 07:30:53,455 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-11-28 07:30:54,044 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-11-28 07:30:54,842 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-11-28 07:30:55,138 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-11-28 07:30:55,139 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:55,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:30:55,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-28 07:30:55,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525516372] [2020-11-28 07:30:55,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:30:55,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:55,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:30:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:30:55,141 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 7 states. [2020-11-28 07:30:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:55,520 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-11-28 07:30:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:30:55,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-28 07:30:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:55,523 INFO L225 Difference]: With dead ends: 137 [2020-11-28 07:30:55,523 INFO L226 Difference]: Without dead ends: 131 [2020-11-28 07:30:55,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:30:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-28 07:30:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2020-11-28 07:30:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-28 07:30:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-11-28 07:30:55,548 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 21 [2020-11-28 07:30:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:55,549 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-11-28 07:30:55,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:30:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-11-28 07:30:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:30:55,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:55,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:55,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:55,765 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1677668213, now seen corresponding path program 1 times [2020-11-28 07:30:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:55,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040242775] [2020-11-28 07:30:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:55,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:55,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786093760] [2020-11-28 07:30:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:30:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:55,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:55,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040242775] [2020-11-28 07:30:55,978 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:55,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786093760] [2020-11-28 07:30:55,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326650041] [2020-11-28 07:30:55,980 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-28 07:30:55,980 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:30:55,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:30:55,981 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:30:55,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:30:56,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:30:56,523 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:30:56,934 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-11-28 07:30:57,460 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-11-28 07:30:57,696 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-28 07:30:58,016 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-28 07:30:58,332 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-28 07:30:58,760 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-28 07:30:59,046 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-11-28 07:31:00,220 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-28 07:31:00,445 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:31:00,446 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:31:00,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:31:00,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-28 07:31:00,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644706530] [2020-11-28 07:31:00,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:31:00,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:31:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:31:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:31:00,447 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 10 states. [2020-11-28 07:31:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:31:00,636 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-11-28 07:31:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 07:31:00,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-11-28 07:31:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:31:00,638 INFO L225 Difference]: With dead ends: 154 [2020-11-28 07:31:00,638 INFO L226 Difference]: Without dead ends: 150 [2020-11-28 07:31:00,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-11-28 07:31:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-28 07:31:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2020-11-28 07:31:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-28 07:31:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-11-28 07:31:00,668 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 21 [2020-11-28 07:31:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:31:00,668 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-11-28 07:31:00,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:31:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-11-28 07:31:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 07:31:00,669 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:31:00,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:31:00,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-28 07:31:00,885 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:31:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:31:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash -468999629, now seen corresponding path program 1 times [2020-11-28 07:31:00,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:31:00,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988297243] [2020-11-28 07:31:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:31:00,900 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:31:00,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922194749] [2020-11-28 07:31:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:31:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:31:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 07:31:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:31:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:31:00,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:31:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:31:01,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988297243] [2020-11-28 07:31:01,049 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:31:01,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922194749] [2020-11-28 07:31:01,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672593426] [2020-11-28 07:31:01,051 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-28 07:31:01,051 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:31:01,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:31:01,051 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:31:01,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:31:01,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:31:01,444 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:31:01,677 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-11-28 07:31:02,137 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2020-11-28 07:31:02,295 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:31:02,505 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-28 07:31:02,775 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-11-28 07:31:03,087 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-11-28 07:31:03,573 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-28 07:31:04,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:31:04,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:31:04,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-28 07:31:04,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031269497] [2020-11-28 07:31:04,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:31:04,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:31:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:31:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:31:04,615 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 8 states. [2020-11-28 07:31:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:31:04,617 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-11-28 07:31:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:31:04,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-28 07:31:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:31:04,617 INFO L225 Difference]: With dead ends: 115 [2020-11-28 07:31:04,617 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:31:04,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:31:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:31:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:31:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:31:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:31:04,618 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-28 07:31:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:31:04,618 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:31:04,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:31:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:31:04,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:31:04,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:31:04,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:31:04,842 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,842 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: false [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 58) the Hoare annotation is: false [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,843 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: false [2020-11-28 07:31:04,843 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L270 CegarLoopResult]: At program point L15-3(lines 41 42) the Hoare annotation is: false [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: false [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: false [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L270 CegarLoopResult]: At program point L15-9(lines 51 52) the Hoare annotation is: false [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L277 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: true [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,844 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,845 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,845 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,845 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:31:04,845 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:31:04,845 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:31:04,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:31:04 BoogieIcfgContainer [2020-11-28 07:31:04,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:31:04,853 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:31:04,853 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:31:04,853 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:31:04,854 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:42" (3/4) ... [2020-11-28 07:31:04,856 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:31:04,866 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-28 07:31:04,867 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 07:31:04,867 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:31:04,867 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:31:04,906 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_42f0a0db-b4f2-4722-a0ec-9785075ebb7a/bin/utaipan/witness.graphml [2020-11-28 07:31:04,907 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:31:04,908 INFO L168 Benchmark]: Toolchain (without parser) took 23280.97 ms. Allocated memory was 111.1 MB in the beginning and 159.4 MB in the end (delta: 48.2 MB). Free memory was 85.4 MB in the beginning and 123.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:04,908 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 111.1 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:04,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.32 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 86.1 MB in the end (delta: -725.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:04,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.20 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 84.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:04,910 INFO L168 Benchmark]: Boogie Preprocessor took 23.55 ms. Allocated memory is still 111.1 MB. Free memory was 84.6 MB in the beginning and 83.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:04,910 INFO L168 Benchmark]: RCFGBuilder took 495.62 ms. Allocated memory is still 111.1 MB. Free memory was 83.4 MB in the beginning and 62.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:04,910 INFO L168 Benchmark]: TraceAbstraction took 22399.64 ms. Allocated memory was 111.1 MB in the beginning and 159.4 MB in the end (delta: 48.2 MB). Free memory was 62.1 MB in the beginning and 126.9 MB in the end (delta: -64.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:04,911 INFO L168 Benchmark]: Witness Printer took 54.13 ms. Allocated memory is still 159.4 MB. Free memory was 126.9 MB in the beginning and 123.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:04,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 111.1 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.32 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 86.1 MB in the end (delta: -725.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.20 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 84.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.55 ms. Allocated memory is still 111.1 MB. Free memory was 84.6 MB in the beginning and 83.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 495.62 ms. Allocated memory is still 111.1 MB. Free memory was 83.4 MB in the beginning and 62.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22399.64 ms. Allocated memory was 111.1 MB in the beginning and 159.4 MB in the end (delta: 48.2 MB). Free memory was 62.1 MB in the beginning and 126.9 MB in the end (delta: -64.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 54.13 ms. Allocated memory is still 159.4 MB. Free memory was 126.9 MB in the beginning and 123.7 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: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.3s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 247 SDtfs, 450 SDslu, 639 SDs, 0 SdLazy, 342 SolverSat, 80 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 181 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 171 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 10 NumberOfFragments, 9 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 16399 SizeOfPredicates, 41 NumberOfNonLiveVariables, 705 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 17 InterpolantComputations, 11 PerfectInterpolantSequences, 6/24 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...