./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_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/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 [2020-11-22 13:01:36,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:36,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:36,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:36,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:36,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:36,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:36,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:36,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:36,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:36,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:37,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:37,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:37,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:37,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:37,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:37,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:37,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:37,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:37,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:37,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:37,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:37,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:37,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:37,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:37,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:37,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:37,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:37,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:37,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:37,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:37,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:37,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:37,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:37,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:37,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:37,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:37,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:37,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:37,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:37,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:37,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:01:37,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:37,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:37,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:37,103 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:37,103 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:37,104 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:37,104 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:37,104 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:37,104 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:37,105 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:37,106 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:37,106 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:37,106 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:37,107 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:37,107 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:37,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:37,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:37,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:37,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:37,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:37,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:01:37,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:37,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:01:37,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:37,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:37,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:01:37,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:37,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:01:37,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:37,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:37,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:37,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:37,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:37,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:37,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:01:37,115 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:37,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:37,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:01:37,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:37,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:37,116 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_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18a16e6e90efc893cf92bbdf7438c312486863 [2020-11-22 13:01:37,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:37,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:37,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:37,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:37,435 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:37,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2020-11-22 13:01:37,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/data/2ff8cecd9/88bef29aa4f840d4a63eef59cb3011f9/FLAG9294ec28f [2020-11-22 13:01:37,951 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:37,952 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2020-11-22 13:01:37,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/data/2ff8cecd9/88bef29aa4f840d4a63eef59cb3011f9/FLAG9294ec28f [2020-11-22 13:01:38,339 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/data/2ff8cecd9/88bef29aa4f840d4a63eef59cb3011f9 [2020-11-22 13:01:38,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:38,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:38,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:38,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:38,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:38,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfb43f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38, skipping insertion in model container [2020-11-22 13:01:38,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:38,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:38,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:38,596 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:38,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:38,654 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:38,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38 WrapperNode [2020-11-22 13:01:38,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:38,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:38,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:38,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:38,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:38,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:38,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:38,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:38,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... [2020-11-22 13:01:38,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:38,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:38,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:38,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:38,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:01:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:01:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:38,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:39,320 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:39,320 INFO L298 CfgBuilder]: Removed 36 assume(true) statements. [2020-11-22 13:01:39,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:39 BoogieIcfgContainer [2020-11-22 13:01:39,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:39,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:39,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:39,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:39,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:38" (1/3) ... [2020-11-22 13:01:39,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c95eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:39, skipping insertion in model container [2020-11-22 13:01:39,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:38" (2/3) ... [2020-11-22 13:01:39,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c95eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:39, skipping insertion in model container [2020-11-22 13:01:39,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:39" (3/3) ... [2020-11-22 13:01:39,336 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.c [2020-11-22 13:01:39,347 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:39,351 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-22 13:01:39,363 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-22 13:01:39,388 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:39,388 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:01:39,388 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:39,389 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:39,389 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:39,389 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:39,389 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:39,389 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-22 13:01:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:39,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:01:39,411 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]=== [2020-11-22 13:01:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 159617293, now seen corresponding path program 1 times [2020-11-22 13:01:39,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:39,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877016376] [2020-11-22 13:01:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:39,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877016376] [2020-11-22 13:01:39,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:39,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:01:39,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153468557] [2020-11-22 13:01:39,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:01:39,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:01:39,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:39,578 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-11-22 13:01:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:39,597 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2020-11-22 13:01:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:01:39,599 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 13:01:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:39,608 INFO L225 Difference]: With dead ends: 71 [2020-11-22 13:01:39,608 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 13:01:39,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 13:01:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-22 13:01:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-22 13:01:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-22 13:01:39,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 5 [2020-11-22 13:01:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:39,646 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-22 13:01:39,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:01:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-22 13:01:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:39,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:39,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:01:39,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:39,648 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]=== [2020-11-22 13:01:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 156511088, now seen corresponding path program 1 times [2020-11-22 13:01:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:39,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328111466] [2020-11-22 13:01:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:39,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022902919] [2020-11-22 13:01:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 13:01:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:39,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:39,820 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:39,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328111466] [2020-11-22 13:01:39,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:39,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022902919] [2020-11-22 13:01:39,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:39,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:01:39,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003128975] [2020-11-22 13:01:39,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:39,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:39,840 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-11-22 13:01:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:42,184 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-11-22 13:01:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:01:42,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 13:01:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:42,189 INFO L225 Difference]: With dead ends: 85 [2020-11-22 13:01:42,189 INFO L226 Difference]: Without dead ends: 79 [2020-11-22 13:01:42,190 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 [2020-11-22 13:01:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-22 13:01:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-11-22 13:01:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 13:01:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-22 13:01:42,203 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 5 [2020-11-22 13:01:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:42,203 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-22 13:01:42,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-22 13:01:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:01:42,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:42,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:01:42,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 13:01:42,417 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]=== [2020-11-22 13:01:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash 556911243, now seen corresponding path program 1 times [2020-11-22 13:01:42,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:42,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976328484] [2020-11-22 13:01:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:42,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:42,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826693231] [2020-11-22 13:01:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:01:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:42,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:42,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976328484] [2020-11-22 13:01:42,564 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826693231] [2020-11-22 13:01:42,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:42,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 13:01:42,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406266670] [2020-11-22 13:01:42,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:42,567 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-11-22 13:01:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:42,613 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-22 13:01:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:42,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 13:01:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:42,618 INFO L225 Difference]: With dead ends: 64 [2020-11-22 13:01:42,618 INFO L226 Difference]: Without dead ends: 60 [2020-11-22 13:01:42,619 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 [2020-11-22 13:01:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-22 13:01:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-22 13:01:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-22 13:01:42,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-22 13:01:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:42,633 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-22 13:01:42,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-22 13:01:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:01:42,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:42,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:42,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:42,861 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]=== [2020-11-22 13:01:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash 83486771, now seen corresponding path program 1 times [2020-11-22 13:01:42,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:42,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410021074] [2020-11-22 13:01:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:42,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:42,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405002883] [2020-11-22 13:01:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 13:01:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:42,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:42,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:42,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410021074] [2020-11-22 13:01:42,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:42,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405002883] [2020-11-22 13:01:42,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:42,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:01:42,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110193104] [2020-11-22 13:01:42,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:42,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:42,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:42,990 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-11-22 13:01:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:43,136 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-22 13:01:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:43,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-22 13:01:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:43,139 INFO L225 Difference]: With dead ends: 92 [2020-11-22 13:01:43,139 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 13:01:43,139 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 [2020-11-22 13:01:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 13:01:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-11-22 13:01:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-22 13:01:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-11-22 13:01:43,161 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 7 [2020-11-22 13:01:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:43,161 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-11-22 13:01:43,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-11-22 13:01:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:01:43,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:43,163 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:43,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:43,377 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]=== [2020-11-22 13:01:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash -608980738, now seen corresponding path program 1 times [2020-11-22 13:01:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:43,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983798461] [2020-11-22 13:01:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:43,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:43,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365500074] [2020-11-22 13:01:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 13:01:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:43,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:43,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983798461] [2020-11-22 13:01:43,535 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:43,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365500074] [2020-11-22 13:01:43,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:43,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-22 13:01:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443778317] [2020-11-22 13:01:43,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:01:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:01:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:43,538 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 8 states. [2020-11-22 13:01:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:43,634 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-11-22 13:01:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:01:43,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-22 13:01:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:43,637 INFO L225 Difference]: With dead ends: 156 [2020-11-22 13:01:43,637 INFO L226 Difference]: Without dead ends: 110 [2020-11-22 13:01:43,638 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 [2020-11-22 13:01:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-22 13:01:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-11-22 13:01:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-22 13:01:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-11-22 13:01:43,653 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 15 [2020-11-22 13:01:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:43,653 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-11-22 13:01:43,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:01:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-11-22 13:01:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:01:43,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:43,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:43,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:43,867 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]=== [2020-11-22 13:01:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash -126968315, now seen corresponding path program 1 times [2020-11-22 13:01:43,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:43,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404926168] [2020-11-22 13:01:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:43,887 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:43,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178827832] [2020-11-22 13:01:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:43,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:01:43,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:43,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:01:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:43,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:44,009 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:44,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404926168] [2020-11-22 13:01:44,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178827832] [2020-11-22 13:01:44,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:44,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 13:01:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777667488] [2020-11-22 13:01:44,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:01:44,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:01:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:44,029 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 7 states. [2020-11-22 13:01:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:44,130 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-11-22 13:01:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:44,130 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-22 13:01:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:44,131 INFO L225 Difference]: With dead ends: 101 [2020-11-22 13:01:44,131 INFO L226 Difference]: Without dead ends: 99 [2020-11-22 13:01:44,132 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 [2020-11-22 13:01:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-22 13:01:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-11-22 13:01:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-22 13:01:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-11-22 13:01:44,154 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 15 [2020-11-22 13:01:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:44,154 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-11-22 13:01:44,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:01:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-11-22 13:01:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:01:44,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:44,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:44,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 13:01:44,357 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]=== [2020-11-22 13:01:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash -14347308, now seen corresponding path program 1 times [2020-11-22 13:01:44,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:44,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34782056] [2020-11-22 13:01:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:44,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:44,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613253927] [2020-11-22 13:01:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-22 13:01:44,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:44,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:01:44,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:01:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:44,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:44,515 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:01:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34782056] [2020-11-22 13:01:44,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613253927] [2020-11-22 13:01:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311005466] [2020-11-22 13:01:44,572 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-11-22 13:01:44,572 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:44,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:44,582 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:44,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:44,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:01:45,511 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:45,732 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-11-22 13:01:46,004 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-22 13:01:46,337 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-11-22 13:01:46,681 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-11-22 13:01:47,367 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-11-22 13:01:47,848 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-11-22 13:01:48,324 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-22 13:01:49,030 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-11-22 13:01:49,655 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-11-22 13:01:50,214 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-11-22 13:01:50,906 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-11-22 13:01:51,132 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-11-22 13:01:51,134 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:51,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:51,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 13:01:51,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395953437] [2020-11-22 13:01:51,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:01:51,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:51,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:01:51,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:01:51,136 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 7 states. [2020-11-22 13:01:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:51,471 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-11-22 13:01:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:01:51,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-22 13:01:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:51,473 INFO L225 Difference]: With dead ends: 137 [2020-11-22 13:01:51,473 INFO L226 Difference]: Without dead ends: 131 [2020-11-22 13:01:51,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-11-22 13:01:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-22 13:01:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2020-11-22 13:01:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-22 13:01:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-11-22 13:01:51,494 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 21 [2020-11-22 13:01:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:51,495 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-11-22 13:01:51,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:01:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-11-22 13:01:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:01:51,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:51,497 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] [2020-11-22 13:01:51,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:51,713 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]=== [2020-11-22 13:01:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1677668213, now seen corresponding path program 1 times [2020-11-22 13:01:51,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:51,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650950034] [2020-11-22 13:01:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:51,723 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:51,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824631545] [2020-11-22 13:01:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/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 [2020-11-22 13:01:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 13:01:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:51,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:51,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650950034] [2020-11-22 13:01:51,890 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:51,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824631545] [2020-11-22 13:01:51,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126493471] [2020-11-22 13:01:51,897 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-22 13:01:51,897 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:51,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:51,898 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:51,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:51,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:01:52,325 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:52,546 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-11-22 13:01:52,973 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-11-22 13:01:53,133 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 13:01:53,380 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-22 13:01:53,625 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-22 13:01:53,949 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-22 13:01:54,480 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-11-22 13:01:55,840 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 13:01:55,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:55,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:55,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-22 13:01:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066728123] [2020-11-22 13:01:55,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 13:01:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 13:01:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-22 13:01:55,842 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 10 states. [2020-11-22 13:01:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:56,044 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-11-22 13:01:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-22 13:01:56,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-11-22 13:01:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:56,046 INFO L225 Difference]: With dead ends: 154 [2020-11-22 13:01:56,046 INFO L226 Difference]: Without dead ends: 150 [2020-11-22 13:01:56,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-11-22 13:01:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-22 13:01:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2020-11-22 13:01:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-22 13:01:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-11-22 13:01:56,061 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 21 [2020-11-22 13:01:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-11-22 13:01:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 13:01:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-11-22 13:01:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 13:01:56,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:56,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:56,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-22 13:01:56,305 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]=== [2020-11-22 13:01:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash -468999629, now seen corresponding path program 1 times [2020-11-22 13:01:56,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:56,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656793628] [2020-11-22 13:01:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:56,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521757310] [2020-11-22 13:01:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/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 [2020-11-22 13:01:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-22 13:01:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:56,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:56,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656793628] [2020-11-22 13:01:56,455 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:56,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521757310] [2020-11-22 13:01:56,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927047506] [2020-11-22 13:01:56,457 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-22 13:01:56,457 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:56,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:56,458 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:56,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:56,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:01:56,843 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:57,084 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-11-22 13:01:57,502 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2020-11-22 13:01:57,865 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-22 13:01:58,187 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-11-22 13:01:58,804 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-11-22 13:01:59,135 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-22 13:01:59,998 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:59,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:59,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 13:01:59,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843707982] [2020-11-22 13:01:59,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:01:59,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:59,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:01:59,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:02:00,000 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 8 states. [2020-11-22 13:02:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:00,001 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-11-22 13:02:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:02:00,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-22 13:02:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:00,001 INFO L225 Difference]: With dead ends: 115 [2020-11-22 13:02:00,002 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:02:00,002 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 [2020-11-22 13:02:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:02:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:02:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:02:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:02:00,003 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-22 13:02:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:00,003 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:02:00,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:02:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:02:00,003 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:02:00,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:02:00,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:02:00,231 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,231 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,231 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:02:00,231 INFO L274 CegarLoopResult]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2020-11-22 13:02:00,231 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: false [2020-11-22 13:02:00,231 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 58) the Hoare annotation is: false [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: false [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L270 CegarLoopResult]: At program point L15-3(lines 41 42) the Hoare annotation is: false [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: false [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: false [2020-11-22 13:02:00,232 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,232 INFO L270 CegarLoopResult]: At program point L15-9(lines 51 52) the Hoare annotation is: false [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L277 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: true [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:02:00,233 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:02:00,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:02:00 BoogieIcfgContainer [2020-11-22 13:02:00,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:02:00,243 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:02:00,243 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:02:00,243 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:02:00,243 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:39" (3/4) ... [2020-11-22 13:02:00,246 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:02:00,255 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-22 13:02:00,256 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:02:00,256 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:02:00,256 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:02:00,311 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a1ddf601-a75f-4fe9-ba36-a2dc54e73337/bin/utaipan/witness.graphml [2020-11-22 13:02:00,311 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:02:00,312 INFO L168 Benchmark]: Toolchain (without parser) took 21969.17 ms. Allocated memory was 92.3 MB in the beginning and 163.6 MB in the end (delta: 71.3 MB). Free memory was 60.8 MB in the beginning and 48.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 83.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,312 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:02:00,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.54 ms. Allocated memory is still 92.3 MB. Free memory was 60.6 MB in the beginning and 68.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,313 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.16 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 66.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,313 INFO L168 Benchmark]: Boogie Preprocessor took 55.49 ms. Allocated memory is still 92.3 MB. Free memory was 66.2 MB in the beginning and 65.3 MB in the end (delta: 959.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,314 INFO L168 Benchmark]: RCFGBuilder took 553.74 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 65.0 MB in the beginning and 89.1 MB in the end (delta: -24.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,314 INFO L168 Benchmark]: TraceAbstraction took 20912.84 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 90.4 MB in the beginning and 52.0 MB in the end (delta: 38.4 MB). Peak memory consumption was 87.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,315 INFO L168 Benchmark]: Witness Printer took 68.49 ms. Allocated memory is still 163.6 MB. Free memory was 52.0 MB in the beginning and 48.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:00,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.54 ms. Allocated memory is still 92.3 MB. Free memory was 60.6 MB in the beginning and 68.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.16 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 66.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.49 ms. Allocated memory is still 92.3 MB. Free memory was 66.2 MB in the beginning and 65.3 MB in the end (delta: 959.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 553.74 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 65.0 MB in the beginning and 89.1 MB in the end (delta: -24.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20912.84 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 90.4 MB in the beginning and 52.0 MB in the end (delta: 38.4 MB). Peak memory consumption was 87.2 MB. Max. memory is 16.1 GB. * Witness Printer took 68.49 ms. Allocated memory is still 163.6 MB. Free memory was 52.0 MB in the beginning and 48.8 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: 20.8s, 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, 13.0s 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, 0.1s SatisfiabilityAnalysisTime, 0.7s 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...