./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.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_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 029d85df21dda5501a92813bcb1234093dd4e34e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:46:37,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:46:37,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:46:37,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:46:37,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:46:37,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:46:37,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:46:37,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:46:37,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:46:37,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:46:37,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:46:37,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:46:37,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:46:37,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:46:37,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:46:37,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:46:37,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:46:37,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:46:37,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:46:37,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:46:37,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:46:37,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:46:37,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:46:37,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:46:37,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:46:37,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:46:37,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:46:37,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:46:37,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:46:37,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:46:37,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:46:37,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:46:37,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:46:37,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:46:37,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:46:37,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:46:37,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:46:37,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:46:37,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:46:37,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:46:37,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:46:37,954 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:46:37,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:46:37,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:46:37,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:46:37,999 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:46:37,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:46:37,999 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:46:37,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:46:38,000 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:46:38,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:46:38,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:46:38,002 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:46:38,002 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:46:38,002 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:46:38,002 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:46:38,003 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:46:38,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:46:38,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:46:38,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:46:38,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:46:38,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:46:38,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:46:38,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:46:38,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:46:38,005 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:46:38,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:46:38,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:46:38,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:46:38,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:46:38,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:46:38,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:46:38,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:46:38,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:46:38,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:46:38,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:46:38,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:46:38,011 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:46:38,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:46:38,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:46:38,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:46:38,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:46:38,012 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_764c62e1-febb-4a6f-903b-0d94482ce548/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 029d85df21dda5501a92813bcb1234093dd4e34e [2020-11-30 01:46:38,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:46:38,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:46:38,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:46:38,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:46:38,367 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:46:38,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-11-30 01:46:38,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/data/1956eed90/ee62f19e16c84c43aade0215b01a8e2a/FLAGbf47b4d62 [2020-11-30 01:46:39,002 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:46:39,004 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-11-30 01:46:39,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/data/1956eed90/ee62f19e16c84c43aade0215b01a8e2a/FLAGbf47b4d62 [2020-11-30 01:46:39,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/data/1956eed90/ee62f19e16c84c43aade0215b01a8e2a [2020-11-30 01:46:39,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:46:39,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:46:39,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:46:39,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:46:39,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:46:39,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56426592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39, skipping insertion in model container [2020-11-30 01:46:39,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:46:39,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:46:39,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:46:39,618 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:46:39,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:46:39,673 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:46:39,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39 WrapperNode [2020-11-30 01:46:39,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:46:39,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:46:39,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:46:39,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:46:39,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:46:39,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:46:39,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:46:39,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:46:39,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... [2020-11-30 01:46:39,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:46:39,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:46:39,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:46:39,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:46:39,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:39,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:46:39,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:46:39,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:46:39,843 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 01:46:39,843 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 01:46:39,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:46:40,338 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:46:40,338 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:46:40,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:46:40 BoogieIcfgContainer [2020-11-30 01:46:40,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:46:40,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:46:40,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:46:40,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:46:40,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:46:39" (1/3) ... [2020-11-30 01:46:40,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700dcaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:46:40, skipping insertion in model container [2020-11-30 01:46:40,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:46:39" (2/3) ... [2020-11-30 01:46:40,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700dcaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:46:40, skipping insertion in model container [2020-11-30 01:46:40,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:46:40" (3/3) ... [2020-11-30 01:46:40,352 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-11-30 01:46:40,371 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:46:40,376 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:46:40,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:46:40,418 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:46:40,419 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:46:40,419 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:46:40,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:46:40,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:46:40,419 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:46:40,419 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:46:40,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:46:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-30 01:46:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:46:40,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:40,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:40,454 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:40,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1096838396, now seen corresponding path program 1 times [2020-11-30 01:46:40,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:40,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488406897] [2020-11-30 01:46:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:40,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488406897] [2020-11-30 01:46:40,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:40,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:46:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619344021] [2020-11-30 01:46:40,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:46:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:46:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:46:40,737 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-11-30 01:46:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:40,870 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 01:46:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:46:40,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-30 01:46:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:40,883 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:46:40,883 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:46:40,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:46:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:46:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:46:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:46:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 01:46:40,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-11-30 01:46:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:40,942 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 01:46:40,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:46:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 01:46:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:46:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:40,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:40,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:46:40,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1249436722, now seen corresponding path program 1 times [2020-11-30 01:46:40,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:40,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078471233] [2020-11-30 01:46:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:46:41,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078471233] [2020-11-30 01:46:41,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381768900] [2020-11-30 01:46:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:46:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:46:41,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:41,609 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 01:46:41,615 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 01:46:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:46:41,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935889114] [2020-11-30 01:46:41,734 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:46:41,734 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:46:41,742 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:46:41,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:46:41,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2020-11-30 01:46:41,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845328457] [2020-11-30 01:46:41,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:46:41,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:46:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:46:41,751 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 12 states. [2020-11-30 01:46:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:41,949 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-30 01:46:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:46:41,950 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-30 01:46:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:41,952 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:46:41,952 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:46:41,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:46:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:46:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 01:46:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 01:46:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-30 01:46:41,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-30 01:46:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:41,962 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-30 01:46:41,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:46:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-30 01:46:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 01:46:41,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:41,964 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:42,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:46:42,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1755191694, now seen corresponding path program 2 times [2020-11-30 01:46:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:42,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535979898] [2020-11-30 01:46:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 01:46:42,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535979898] [2020-11-30 01:46:42,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881645582] [2020-11-30 01:46:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:42,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:46:42,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:46:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:46:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 01:46:42,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 01:46:43,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611782004] [2020-11-30 01:46:43,365 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:46:43,366 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:46:43,366 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:46:43,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:46:43,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2020-11-30 01:46:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190671460] [2020-11-30 01:46:43,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:46:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:46:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:46:43,376 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 16 states. [2020-11-30 01:46:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:43,701 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-30 01:46:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:46:43,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-11-30 01:46:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:43,704 INFO L225 Difference]: With dead ends: 30 [2020-11-30 01:46:43,704 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 01:46:43,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:46:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 01:46:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-30 01:46:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 01:46:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-30 01:46:43,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-11-30 01:46:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:43,714 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-30 01:46:43,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:46:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-30 01:46:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 01:46:43,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:43,716 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:43,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:43,917 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2097719118, now seen corresponding path program 3 times [2020-11-30 01:46:43,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:43,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351305212] [2020-11-30 01:46:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-11-30 01:46:44,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351305212] [2020-11-30 01:46:44,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582251894] [2020-11-30 01:46:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:44,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:46:44,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:46:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:46:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 01:46:44,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 01:46:46,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058060732] [2020-11-30 01:46:46,110 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:46:46,110 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:46:46,111 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:46:46,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:46:46,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2020-11-30 01:46:46,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810482495] [2020-11-30 01:46:46,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:46:46,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:46:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:46:46,116 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-11-30 01:46:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:46,527 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-30 01:46:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:46:46,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-11-30 01:46:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:46,530 INFO L225 Difference]: With dead ends: 36 [2020-11-30 01:46:46,530 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:46:46,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-11-30 01:46:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:46:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-30 01:46:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:46:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-30 01:46:46,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-11-30 01:46:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:46,540 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-30 01:46:46,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:46:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-30 01:46:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-30 01:46:46,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:46,543 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:46,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:46,743 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1804256526, now seen corresponding path program 4 times [2020-11-30 01:46:46,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:46,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958771817] [2020-11-30 01:46:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-30 01:46:47,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958771817] [2020-11-30 01:46:47,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116575860] [2020-11-30 01:46:47,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 01:46:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-30 01:46:47,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-30 01:46:50,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864946819] [2020-11-30 01:46:50,520 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:46:50,520 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:46:50,521 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:46:50,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:46:50,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2020-11-30 01:46:50,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233718089] [2020-11-30 01:46:50,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 01:46:50,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:50,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 01:46:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:46:50,527 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 24 states. [2020-11-30 01:46:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:51,047 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-30 01:46:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:46:51,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-11-30 01:46:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:51,051 INFO L225 Difference]: With dead ends: 42 [2020-11-30 01:46:51,052 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 01:46:51,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 01:46:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 01:46:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-30 01:46:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 01:46:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-30 01:46:51,076 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-11-30 01:46:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:51,078 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-30 01:46:51,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 01:46:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-30 01:46:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-30 01:46:51,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:51,086 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:51,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:51,306 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash 32010958, now seen corresponding path program 5 times [2020-11-30 01:46:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:51,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695831101] [2020-11-30 01:46:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-11-30 01:46:51,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695831101] [2020-11-30 01:46:51,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357409266] [2020-11-30 01:46:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:51,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 01:46:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:46:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 01:46:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-30 01:46:51,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-30 01:46:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956262647] [2020-11-30 01:46:57,103 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:46:57,104 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:46:57,105 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:46:57,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:46:57,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2020-11-30 01:46:57,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658940239] [2020-11-30 01:46:57,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 01:46:57,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 01:46:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-11-30 01:46:57,111 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 28 states. [2020-11-30 01:46:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:57,559 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-30 01:46:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:46:57,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-11-30 01:46:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:57,563 INFO L225 Difference]: With dead ends: 48 [2020-11-30 01:46:57,563 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:46:57,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=1074, Unknown=0, NotChecked=0, Total=1560 [2020-11-30 01:46:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:46:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-30 01:46:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 01:46:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-30 01:46:57,574 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-11-30 01:46:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:57,575 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-30 01:46:57,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 01:46:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-30 01:46:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-30 01:46:57,578 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:57,578 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:57,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 01:46:57,793 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1562005362, now seen corresponding path program 6 times [2020-11-30 01:46:57,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:57,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819495057] [2020-11-30 01:46:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-11-30 01:46:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819495057] [2020-11-30 01:46:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373215677] [2020-11-30 01:46:58,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:46:58,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:46:58,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:46:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 01:46:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-30 01:46:58,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:47:05,104 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-30 01:47:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-11-30 01:47:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603788752] [2020-11-30 01:47:06,618 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:47:06,618 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:47:06,619 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:47:06,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:47:06,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2020-11-30 01:47:06,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205824843] [2020-11-30 01:47:06,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-30 01:47:06,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:47:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-30 01:47:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-11-30 01:47:06,627 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 32 states. [2020-11-30 01:47:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:47:07,323 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-11-30 01:47:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 01:47:07,324 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 75 [2020-11-30 01:47:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:47:07,327 INFO L225 Difference]: With dead ends: 54 [2020-11-30 01:47:07,327 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:47:07,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 128 SyntacticMatches, 17 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=650, Invalid=1420, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 01:47:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:47:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-30 01:47:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-30 01:47:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-11-30 01:47:07,338 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-11-30 01:47:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:47:07,339 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-11-30 01:47:07,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-30 01:47:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-11-30 01:47:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-30 01:47:07,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:47:07,342 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:47:07,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:47:07,545 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:47:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:47:07,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2042200498, now seen corresponding path program 7 times [2020-11-30 01:47:07,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:47:07,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915331617] [2020-11-30 01:47:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:47:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:47:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-11-30 01:47:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915331617] [2020-11-30 01:47:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263295327] [2020-11-30 01:47:08,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:47:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:47:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:47:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:47:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-30 01:47:08,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:47:12,631 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 01:47:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-11-30 01:47:21,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93288707] [2020-11-30 01:47:21,043 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:47:21,044 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:47:21,044 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:47:21,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:47:21,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2020-11-30 01:47:21,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311931977] [2020-11-30 01:47:21,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-30 01:47:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:47:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-30 01:47:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-11-30 01:47:21,048 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 36 states. [2020-11-30 01:47:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:47:21,866 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-30 01:47:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 01:47:21,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2020-11-30 01:47:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:47:21,870 INFO L225 Difference]: With dead ends: 60 [2020-11-30 01:47:21,870 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 01:47:21,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=838, Invalid=1814, Unknown=0, NotChecked=0, Total=2652 [2020-11-30 01:47:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 01:47:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-30 01:47:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-30 01:47:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-11-30 01:47:21,890 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-11-30 01:47:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:47:21,891 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-11-30 01:47:21,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-30 01:47:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-11-30 01:47:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-30 01:47:21,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:47:21,895 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:47:22,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:47:22,096 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:47:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:47:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -120660978, now seen corresponding path program 8 times [2020-11-30 01:47:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:47:22,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479738867] [2020-11-30 01:47:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:47:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:47:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-30 01:47:23,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479738867] [2020-11-30 01:47:23,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388482975] [2020-11-30 01:47:23,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/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 [2020-11-30 01:47:23,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-30 01:47:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:47:23,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 67 conjunts are in the unsatisfiable core [2020-11-30 01:47:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:47:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-30 01:47:23,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:47:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-30 01:47:27,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067897178] [2020-11-30 01:47:27,039 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:47:27,040 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:47:27,040 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:47:27,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:47:27,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 35 [2020-11-30 01:47:27,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131438462] [2020-11-30 01:47:27,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-30 01:47:27,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:47:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-30 01:47:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:47:27,054 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 35 states. [2020-11-30 01:47:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:47:27,834 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-11-30 01:47:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-30 01:47:27,835 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2020-11-30 01:47:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:47:27,837 INFO L225 Difference]: With dead ends: 63 [2020-11-30 01:47:27,838 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:47:27,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:47:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:47:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-30 01:47:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 01:47:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-11-30 01:47:27,848 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2020-11-30 01:47:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:47:27,849 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-11-30 01:47:27,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-30 01:47:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-11-30 01:47:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-30 01:47:27,852 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:47:27,852 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:47:28,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-30 01:47:28,062 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:47:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:47:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1842070268, now seen corresponding path program 9 times [2020-11-30 01:47:28,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:47:28,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636805041] [2020-11-30 01:47:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:47:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:47:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 345 proven. 78 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-11-30 01:47:28,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636805041] [2020-11-30 01:47:28,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722042956] [2020-11-30 01:47:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:47:29,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:47:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:47:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:47:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:47:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-30 01:47:29,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:47:32,043 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-11-30 01:47:32,150 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-11-30 01:47:32,267 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-11-30 01:47:32,391 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-30 01:47:32,502 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-30 01:47:32,622 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-30 01:47:32,774 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-30 01:47:32,929 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-11-30 01:47:33,130 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-11-30 01:47:33,260 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-30 01:47:33,405 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-30 01:47:34,918 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-30 01:47:35,029 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-30 01:47:36,347 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-11-30 01:47:36,458 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-11-30 01:47:36,577 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-11-30 01:47:36,705 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-30 01:47:36,828 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-30 01:47:36,947 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-30 01:47:37,071 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-30 01:47:38,902 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-30 01:47:39,015 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-30 01:47:39,470 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 01:47:39,745 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-30 01:47:39,872 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-30 01:47:39,989 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-30 01:47:40,126 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-30 01:47:40,245 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-11-30 01:47:40,363 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-11-30 01:47:40,482 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-11-30 01:47:40,601 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-11-30 01:47:42,856 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-11-30 01:47:43,062 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-30 01:47:43,264 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 01:47:43,372 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 01:47:43,493 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-30 01:47:43,613 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-30 01:47:43,734 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-30 01:47:43,848 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-30 01:47:46,173 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-11-30 01:47:46,280 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-30 01:47:46,480 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 01:47:46,586 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 01:47:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-11-30 01:47:57,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:47:57,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22, 37] total 41 [2020-11-30 01:47:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660935324] [2020-11-30 01:47:57,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 01:47:57,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:47:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 01:47:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 01:47:57,661 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-11-30 01:47:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:47:58,219 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-11-30 01:47:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 01:47:58,220 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-11-30 01:47:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:47:58,221 INFO L225 Difference]: With dead ends: 59 [2020-11-30 01:47:58,221 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:47:58,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 179 SyntacticMatches, 27 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1018, Invalid=2288, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 01:47:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:47:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:47:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:47:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:47:58,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2020-11-30 01:47:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:47:58,224 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:47:58,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 01:47:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:47:58,225 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:47:58,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:47:58,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:47:58,473 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:47:58,473 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (= 15 ULTIMATE.start_main_~input~0) [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-11-30 01:47:58,474 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-11-30 01:47:58,475 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (and (<= id_~x |id_#in~x|) (<= |id_#in~x| id_~x)) [2020-11-30 01:47:58,475 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-11-30 01:47:58,475 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-30 01:47:58,475 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-30 01:47:58,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:47:58 BoogieIcfgContainer [2020-11-30 01:47:58,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:47:58,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:47:58,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:47:58,481 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:47:58,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:46:40" (3/4) ... [2020-11-30 01:47:58,486 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:47:58,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-30 01:47:58,499 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-30 01:47:58,499 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:47:58,499 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:47:58,499 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:47:58,531 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_764c62e1-febb-4a6f-903b-0d94482ce548/bin/utaipan/witness.graphml [2020-11-30 01:47:58,531 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:47:58,532 INFO L168 Benchmark]: Toolchain (without parser) took 79149.21 ms. Allocated memory was 83.9 MB in the beginning and 708.8 MB in the end (delta: 625.0 MB). Free memory was 53.2 MB in the beginning and 495.4 MB in the end (delta: -442.2 MB). Peak memory consumption was 182.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:47:58,533 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 77.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:47:58,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.81 ms. Allocated memory was 83.9 MB in the beginning and 111.1 MB in the end (delta: 27.3 MB). Free memory was 53.1 MB in the beginning and 89.0 MB in the end (delta: -35.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:47:58,534 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.71 ms. Allocated memory is still 111.1 MB. Free memory was 89.0 MB in the beginning and 87.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:47:58,535 INFO L168 Benchmark]: Boogie Preprocessor took 40.27 ms. Allocated memory is still 111.1 MB. Free memory was 87.7 MB in the beginning and 86.9 MB in the end (delta: 876.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:47:58,535 INFO L168 Benchmark]: RCFGBuilder took 576.72 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 74.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:47:58,536 INFO L168 Benchmark]: TraceAbstraction took 78137.41 ms. Allocated memory was 111.1 MB in the beginning and 708.8 MB in the end (delta: 597.7 MB). Free memory was 73.7 MB in the beginning and 497.5 MB in the end (delta: -423.8 MB). Peak memory consumption was 175.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:47:58,537 INFO L168 Benchmark]: Witness Printer took 51.09 ms. Allocated memory is still 708.8 MB. Free memory was 497.5 MB in the beginning and 495.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:47:58,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 77.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.81 ms. Allocated memory was 83.9 MB in the beginning and 111.1 MB in the end (delta: 27.3 MB). Free memory was 53.1 MB in the beginning and 89.0 MB in the end (delta: -35.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.71 ms. Allocated memory is still 111.1 MB. Free memory was 89.0 MB in the beginning and 87.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.27 ms. Allocated memory is still 111.1 MB. Free memory was 87.7 MB in the beginning and 86.9 MB in the end (delta: 876.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 576.72 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 74.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 78137.41 ms. Allocated memory was 111.1 MB in the beginning and 708.8 MB in the end (delta: 597.7 MB). Free memory was 73.7 MB in the beginning and 497.5 MB in the end (delta: -423.8 MB). Peak memory consumption was 175.1 MB. Max. memory is 16.1 GB. * Witness Printer took 51.09 ms. Allocated memory is still 708.8 MB. Free memory was 497.5 MB in the beginning and 495.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 78.0s, OverallIterations: 10, TraceHistogramMax: 17, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 768 SDslu, 1652 SDs, 0 SdLazy, 1297 SolverSat, 378 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1402 GetRequests, 978 SyntacticMatches, 107 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 68.0s InterpolantComputationTime, 1131 NumberOfCodeBlocks, 1131 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1664 ConstructedInterpolants, 0 QuantifiedInterpolants, 408466 SizeOfPredicates, 82 NumberOfNonLiveVariables, 1588 ConjunctsInSsa, 229 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 4628/8664 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...