./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/recHanoi02-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi02-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d379c583eb269678169316efe01a55df7fa26acebe2991472725b0afcb2879ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:13:58,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:13:58,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:13:58,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:13:58,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:13:58,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:13:58,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:13:58,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:13:58,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:13:58,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:13:58,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:13:58,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:13:58,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:13:58,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:13:58,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:13:58,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:13:58,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:13:58,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:13:58,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:13:58,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:13:58,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:13:58,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:13:58,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:13:58,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:13:58,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:13:58,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:13:58,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:13:58,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:13:58,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:13:58,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:13:58,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:13:58,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:13:58,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:13:58,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:13:58,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:13:58,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:13:58,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:13:58,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:13:58,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:13:58,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:13:58,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:13:58,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-19 14:13:58,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:13:58,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:13:58,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:13:58,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:13:58,279 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:13:58,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:13:58,280 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:13:58,280 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:13:58,280 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:13:58,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:13:58,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:13:58,281 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:13:58,282 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:13:58,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:13:58,282 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:13:58,282 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:13:58,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:13:58,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:13:58,283 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:13:58,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:13:58,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:13:58,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:13:58,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:13:58,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:13:58,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:13:58,285 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 14:13:58,285 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:13:58,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:13:58,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:13:58,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:13:58,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:13:58,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:13:58,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:13:58,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:13:58,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:13:58,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:13:58,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:13:58,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:13:58,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:13:58,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:13:58,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:13:58,289 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_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d379c583eb269678169316efe01a55df7fa26acebe2991472725b0afcb2879ab [2021-11-19 14:13:58,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:13:58,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:13:58,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:13:58,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:13:58,555 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:13:58,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/recursive/recHanoi02-2.c [2021-11-19 14:13:58,635 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/data/d70580357/4857d784f31e46ecaf629bd79fa38962/FLAGd133718a1 [2021-11-19 14:13:59,162 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:13:59,162 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/sv-benchmarks/c/recursive/recHanoi02-2.c [2021-11-19 14:13:59,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/data/d70580357/4857d784f31e46ecaf629bd79fa38962/FLAGd133718a1 [2021-11-19 14:13:59,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/data/d70580357/4857d784f31e46ecaf629bd79fa38962 [2021-11-19 14:13:59,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:13:59,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:13:59,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:13:59,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:13:59,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:13:59,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0b0a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59, skipping insertion in model container [2021-11-19 14:13:59,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:13:59,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:13:59,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/sv-benchmarks/c/recursive/recHanoi02-2.c[839,852] [2021-11-19 14:13:59,791 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:13:59,803 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:13:59,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/sv-benchmarks/c/recursive/recHanoi02-2.c[839,852] [2021-11-19 14:13:59,821 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:13:59,834 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:13:59,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59 WrapperNode [2021-11-19 14:13:59,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:13:59,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:13:59,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:13:59,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:13:59,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,872 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2021-11-19 14:13:59,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:13:59,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:13:59,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:13:59,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:13:59,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:13:59,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:13:59,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:13:59,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:13:59,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:13:59,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:59,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:13:59,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:13:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:13:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-19 14:13:59,992 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-19 14:13:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:13:59,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:13:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:14:00,058 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:00,060 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:00,226 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:00,244 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:00,244 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:14:00,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:00 BoogieIcfgContainer [2021-11-19 14:14:00,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:00,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:00,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:00,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:00,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:13:59" (1/3) ... [2021-11-19 14:14:00,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724849f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:00, skipping insertion in model container [2021-11-19 14:14:00,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59" (2/3) ... [2021-11-19 14:14:00,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724849f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:00, skipping insertion in model container [2021-11-19 14:14:00,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:00" (3/3) ... [2021-11-19 14:14:00,255 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2021-11-19 14:14:00,261 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:00,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-19 14:14:00,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:00,315 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:14:00,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-19 14:14:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:14:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:14:00,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:00,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:14:00,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:00,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2121594553, now seen corresponding path program 1 times [2021-11-19 14:14:00,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:00,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327681113] [2021-11-19 14:14:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:00,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:00,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:00,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327681113] [2021-11-19 14:14:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327681113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:00,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:00,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:14:00,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166999320] [2021-11-19 14:14:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:00,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:00,580 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:00,649 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-19 14:14:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-19 14:14:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:00,659 INFO L225 Difference]: With dead ends: 26 [2021-11-19 14:14:00,660 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 14:14:00,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:00,667 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:00,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 14:14:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 14:14:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:14:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-19 14:14:00,706 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-11-19 14:14:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:00,707 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-19 14:14:00,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-19 14:14:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:14:00,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:00,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:00,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:14:00,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1344921665, now seen corresponding path program 1 times [2021-11-19 14:14:00,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:00,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912414806] [2021-11-19 14:14:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:00,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:00,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:00,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912414806] [2021-11-19 14:14:00,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912414806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:00,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:00,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:14:00,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404164058] [2021-11-19 14:14:00,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:00,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:00,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:00,760 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:00,800 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-11-19 14:14:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 14:14:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:00,804 INFO L225 Difference]: With dead ends: 39 [2021-11-19 14:14:00,804 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 14:14:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:00,807 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:00,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 14:14:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-19 14:14:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:14:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-19 14:14:00,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2021-11-19 14:14:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:00,820 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-19 14:14:00,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-19 14:14:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:14:00,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:00,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:00,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:14:00,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -168070099, now seen corresponding path program 1 times [2021-11-19 14:14:00,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:00,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017893383] [2021-11-19 14:14:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:00,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:00,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:00,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017893383] [2021-11-19 14:14:00,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017893383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:00,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578647494] [2021-11-19 14:14:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:00,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:00,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:00,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:14:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:14:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:01,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:01,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578647494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:01,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286664479] [2021-11-19 14:14:01,278 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:14:01,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:01,283 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:01,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:01,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-19 14:14:01,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350211255] [2021-11-19 14:14:01,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:01,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:14:01,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:14:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:01,312 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:01,581 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-11-19 14:14:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:14:01,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 14:14:01,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:01,584 INFO L225 Difference]: With dead ends: 91 [2021-11-19 14:14:01,584 INFO L226 Difference]: Without dead ends: 90 [2021-11-19 14:14:01,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:01,587 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 185 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:01,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 114 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-19 14:14:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-11-19 14:14:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 55 states have internal predecessors, (75), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 14:14:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2021-11-19 14:14:01,613 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 12 [2021-11-19 14:14:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:01,613 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-11-19 14:14:01,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2021-11-19 14:14:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 14:14:01,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:01,617 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:01,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 14:14:01,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:01,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1692888866, now seen corresponding path program 1 times [2021-11-19 14:14:01,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:01,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100452650] [2021-11-19 14:14:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:01,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:14:01,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:01,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100452650] [2021-11-19 14:14:01,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100452650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:01,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:01,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:14:01,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097316042] [2021-11-19 14:14:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:01,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:01,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:01,892 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:14:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:01,922 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2021-11-19 14:14:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-19 14:14:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:01,925 INFO L225 Difference]: With dead ends: 103 [2021-11-19 14:14:01,925 INFO L226 Difference]: Without dead ends: 92 [2021-11-19 14:14:01,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:01,928 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:01,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-19 14:14:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-19 14:14:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 77 states have internal predecessors, (97), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-19 14:14:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2021-11-19 14:14:01,945 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 14 [2021-11-19 14:14:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:01,946 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2021-11-19 14:14:01,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:14:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2021-11-19 14:14:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 14:14:01,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:01,948 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-11-19 14:14:01,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:14:01,948 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1195792703, now seen corresponding path program 2 times [2021-11-19 14:14:01,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:01,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532459789] [2021-11-19 14:14:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:01,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:02,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:02,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532459789] [2021-11-19 14:14:02,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532459789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:02,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910930080] [2021-11-19 14:14:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:14:02,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:02,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:02,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:02,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:14:02,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:14:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:02,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:14:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:02,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:02,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910930080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:02,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576768319] [2021-11-19 14:14:02,566 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:14:02,566 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:02,567 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:02,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:02,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-19 14:14:02,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059993594] [2021-11-19 14:14:02,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:02,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:14:02,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:14:02,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:14:02,570 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:03,055 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2021-11-19 14:14:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 14:14:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-19 14:14:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:03,063 INFO L225 Difference]: With dead ends: 247 [2021-11-19 14:14:03,063 INFO L226 Difference]: Without dead ends: 246 [2021-11-19 14:14:03,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=1207, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 14:14:03,068 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 542 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:03,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 255 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-19 14:14:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 206. [2021-11-19 14:14:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 170 states have (on average 1.311764705882353) internal successors, (223), 173 states have internal predecessors, (223), 12 states have call successors, (12), 11 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-19 14:14:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2021-11-19 14:14:03,118 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 27 [2021-11-19 14:14:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:03,118 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2021-11-19 14:14:03,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2021-11-19 14:14:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:14:03,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:03,120 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:03,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:03,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:03,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash 753695794, now seen corresponding path program 1 times [2021-11-19 14:14:03,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:03,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479315956] [2021-11-19 14:14:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:03,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:03,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:03,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479315956] [2021-11-19 14:14:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479315956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:03,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214315193] [2021-11-19 14:14:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:03,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:03,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:03,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:14:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:03,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:14:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:03,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:03,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214315193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:03,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897341748] [2021-11-19 14:14:03,735 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-19 14:14:03,735 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:03,735 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:03,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:03,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-19 14:14:03,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670314441] [2021-11-19 14:14:03,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:03,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:14:03,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:14:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:03,738 INFO L87 Difference]: Start difference. First operand 206 states and 256 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:14:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:03,812 INFO L93 Difference]: Finished difference Result 399 states and 548 transitions. [2021-11-19 14:14:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:14:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 26 [2021-11-19 14:14:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:03,821 INFO L225 Difference]: With dead ends: 399 [2021-11-19 14:14:03,821 INFO L226 Difference]: Without dead ends: 397 [2021-11-19 14:14:03,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:03,825 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:03,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 67 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-19 14:14:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 376. [2021-11-19 14:14:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 314 states have (on average 1.2547770700636942) internal successors, (394), 313 states have internal predecessors, (394), 12 states have call successors, (12), 11 states have call predecessors, (12), 46 states have return successors, (51), 51 states have call predecessors, (51), 11 states have call successors, (51) [2021-11-19 14:14:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 457 transitions. [2021-11-19 14:14:03,870 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 457 transitions. Word has length 26 [2021-11-19 14:14:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:03,871 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 457 transitions. [2021-11-19 14:14:03,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:14:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 457 transitions. [2021-11-19 14:14:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 14:14:03,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:03,873 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:03,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 14:14:04,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting hanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1889733178, now seen corresponding path program 1 times [2021-11-19 14:14:04,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:04,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055647914] [2021-11-19 14:14:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:04,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:04,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:04,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055647914] [2021-11-19 14:14:04,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055647914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:04,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361458529] [2021-11-19 14:14:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:04,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:04,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:04,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:04,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:14:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:14:04,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:04,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:04,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361458529] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:04,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:14:04,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2021-11-19 14:14:04,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111874834] [2021-11-19 14:14:04,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:04,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:04,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:04,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:04,449 INFO L87 Difference]: Start difference. First operand 376 states and 457 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:14:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:04,488 INFO L93 Difference]: Finished difference Result 376 states and 457 transitions. [2021-11-19 14:14:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:04,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-19 14:14:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:04,492 INFO L225 Difference]: With dead ends: 376 [2021-11-19 14:14:04,492 INFO L226 Difference]: Without dead ends: 332 [2021-11-19 14:14:04,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:04,494 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:04,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 35 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-19 14:14:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-11-19 14:14:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 278 states have (on average 1.0611510791366907) internal successors, (295), 275 states have internal predecessors, (295), 12 states have call successors, (12), 11 states have call predecessors, (12), 40 states have return successors, (45), 45 states have call predecessors, (45), 11 states have call successors, (45) [2021-11-19 14:14:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 352 transitions. [2021-11-19 14:14:04,517 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 352 transitions. Word has length 27 [2021-11-19 14:14:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:04,517 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 352 transitions. [2021-11-19 14:14:04,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:14:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 352 transitions. [2021-11-19 14:14:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:14:04,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:04,528 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1] [2021-11-19 14:14:04,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:04,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 14:14:04,743 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2009114495, now seen corresponding path program 3 times [2021-11-19 14:14:04,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:04,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623851111] [2021-11-19 14:14:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:04,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:05,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:05,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623851111] [2021-11-19 14:14:05,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623851111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:05,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747498642] [2021-11-19 14:14:05,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:14:05,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:05,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:05,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:05,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:14:05,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:14:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:14:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:05,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:05,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747498642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:05,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700357146] [2021-11-19 14:14:05,957 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:14:05,958 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:05,958 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:05,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:05,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-19 14:14:05,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866869734] [2021-11-19 14:14:05,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:05,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:14:05,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:14:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:14:05,962 INFO L87 Difference]: Start difference. First operand 332 states and 352 transitions. Second operand has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:07,169 INFO L93 Difference]: Finished difference Result 799 states and 832 transitions. [2021-11-19 14:14:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-19 14:14:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 14:14:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:07,176 INFO L225 Difference]: With dead ends: 799 [2021-11-19 14:14:07,176 INFO L226 Difference]: Without dead ends: 798 [2021-11-19 14:14:07,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2204, Invalid=5278, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 14:14:07,183 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 956 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:07,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 432 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:14:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-19 14:14:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 776. [2021-11-19 14:14:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 650 states have (on average 1.063076923076923) internal successors, (691), 647 states have internal predecessors, (691), 24 states have call successors, (24), 23 states have call predecessors, (24), 100 states have return successors, (105), 105 states have call predecessors, (105), 23 states have call successors, (105) [2021-11-19 14:14:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 820 transitions. [2021-11-19 14:14:07,219 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 820 transitions. Word has length 57 [2021-11-19 14:14:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:07,219 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 820 transitions. [2021-11-19 14:14:07,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 820 transitions. [2021-11-19 14:14:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:14:07,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:07,223 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-19 14:14:07,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:07,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 14:14:07,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -769826526, now seen corresponding path program 2 times [2021-11-19 14:14:07,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:07,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080695358] [2021-11-19 14:14:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:07,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 14:14:07,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:07,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080695358] [2021-11-19 14:14:07,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080695358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:07,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193563889] [2021-11-19 14:14:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:14:07,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:07,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:07,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:14:07,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:14:07,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:14:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 14:14:07,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 14:14:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193563889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:08,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358903568] [2021-11-19 14:14:08,433 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-19 14:14:08,434 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:08,434 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:08,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:08,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-11-19 14:14:08,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306370426] [2021-11-19 14:14:08,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:08,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:14:08,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:14:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:14:08,438 INFO L87 Difference]: Start difference. First operand 776 states and 820 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:14:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:08,552 INFO L93 Difference]: Finished difference Result 1713 states and 1894 transitions. [2021-11-19 14:14:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 14:14:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 62 [2021-11-19 14:14:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:08,563 INFO L225 Difference]: With dead ends: 1713 [2021-11-19 14:14:08,564 INFO L226 Difference]: Without dead ends: 1415 [2021-11-19 14:14:08,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:14:08,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:08,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 83 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-11-19 14:14:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1415. [2021-11-19 14:14:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1202 states have (on average 1.0291181364392679) internal successors, (1237), 1193 states have internal predecessors, (1237), 24 states have call successors, (24), 23 states have call predecessors, (24), 187 states have return successors, (198), 198 states have call predecessors, (198), 23 states have call successors, (198) [2021-11-19 14:14:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 1459 transitions. [2021-11-19 14:14:08,637 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 1459 transitions. Word has length 62 [2021-11-19 14:14:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:08,637 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 1459 transitions. [2021-11-19 14:14:08,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:14:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 1459 transitions. [2021-11-19 14:14:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:14:08,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:08,641 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1] [2021-11-19 14:14:08,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:08,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:08,855 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1606022143, now seen corresponding path program 4 times [2021-11-19 14:14:08,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:08,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191096901] [2021-11-19 14:14:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:08,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:09,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:09,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191096901] [2021-11-19 14:14:09,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191096901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:09,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823920029] [2021-11-19 14:14:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:14:09,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:09,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:09,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:09,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:14:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 14:14:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:10,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:12,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823920029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:12,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946453376] [2021-11-19 14:14:12,447 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:14:12,447 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:12,448 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:12,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:12,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-19 14:14:12,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664256114] [2021-11-19 14:14:12,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:12,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-19 14:14:12,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-19 14:14:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-11-19 14:14:12,468 INFO L87 Difference]: Start difference. First operand 1415 states and 1459 transitions. Second operand has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:16,435 INFO L93 Difference]: Finished difference Result 3358 states and 3427 transitions. [2021-11-19 14:14:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-19 14:14:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-19 14:14:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:16,466 INFO L225 Difference]: With dead ends: 3358 [2021-11-19 14:14:16,467 INFO L226 Difference]: Without dead ends: 3357 [2021-11-19 14:14:16,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7136 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9119, Invalid=22033, Unknown=0, NotChecked=0, Total=31152 [2021-11-19 14:14:16,479 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 2597 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2599 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:16,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2599 Valid, 967 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:14:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-11-19 14:14:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3311. [2021-11-19 14:14:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3311 states, 2810 states have (on average 1.0295373665480427) internal successors, (2893), 2801 states have internal predecessors, (2893), 48 states have call successors, (48), 47 states have call predecessors, (48), 451 states have return successors, (462), 462 states have call predecessors, (462), 47 states have call successors, (462) [2021-11-19 14:14:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 3403 transitions. [2021-11-19 14:14:16,579 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 3403 transitions. Word has length 117 [2021-11-19 14:14:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:16,579 INFO L470 AbstractCegarLoop]: Abstraction has 3311 states and 3403 transitions. [2021-11-19 14:14:16,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 3403 transitions. [2021-11-19 14:14:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:14:16,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:16,589 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-19 14:14:16,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:16,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:16,803 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash 747703330, now seen corresponding path program 3 times [2021-11-19 14:14:16,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:16,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993871840] [2021-11-19 14:14:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:16,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-19 14:14:17,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:17,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993871840] [2021-11-19 14:14:17,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993871840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:17,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736518494] [2021-11-19 14:14:17,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:14:17,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:17,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:17,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:14:17,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:14:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:14:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-19 14:14:17,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-19 14:14:21,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736518494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:21,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340652660] [2021-11-19 14:14:21,826 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-19 14:14:21,826 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:21,827 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:21,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:21,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2021-11-19 14:14:21,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366125640] [2021-11-19 14:14:21,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:21,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:14:21,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:21,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:14:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:14:21,830 INFO L87 Difference]: Start difference. First operand 3311 states and 3403 transitions. Second operand has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-19 14:14:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:22,080 INFO L93 Difference]: Finished difference Result 7200 states and 7855 transitions. [2021-11-19 14:14:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 14:14:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) Word has length 134 [2021-11-19 14:14:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:22,111 INFO L225 Difference]: With dead ends: 7200 [2021-11-19 14:14:22,111 INFO L226 Difference]: Without dead ends: 5849 [2021-11-19 14:14:22,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 233 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:14:22,120 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:22,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 136 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-11-19 14:14:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5849. [2021-11-19 14:14:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4994 states have (on average 1.014217060472567) internal successors, (5065), 4973 states have internal predecessors, (5065), 48 states have call successors, (48), 47 states have call predecessors, (48), 805 states have return successors, (828), 828 states have call predecessors, (828), 47 states have call successors, (828) [2021-11-19 14:14:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 5941 transitions. [2021-11-19 14:14:22,341 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 5941 transitions. Word has length 134 [2021-11-19 14:14:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:22,343 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 5941 transitions. [2021-11-19 14:14:22,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-19 14:14:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 5941 transitions. [2021-11-19 14:14:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-19 14:14:22,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:22,352 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1] [2021-11-19 14:14:22,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:22,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 14:14:22,571 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash 464473343, now seen corresponding path program 5 times [2021-11-19 14:14:22,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:22,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867247951] [2021-11-19 14:14:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:22,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:25,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:25,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867247951] [2021-11-19 14:14:25,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867247951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:25,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763559694] [2021-11-19 14:14:25,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:14:25,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:25,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 14:14:25,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-19 14:14:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-19 14:14:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:26,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:32,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763559694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:32,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713634245] [2021-11-19 14:14:32,779 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:14:32,779 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:32,779 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:14:32,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:32,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-19 14:14:32,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765618958] [2021-11-19 14:14:32,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:32,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-19 14:14:32,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-19 14:14:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2021-11-19 14:14:32,795 INFO L87 Difference]: Start difference. First operand 5849 states and 5941 transitions. Second operand has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:47,966 INFO L93 Difference]: Finished difference Result 13768 states and 13909 transitions. [2021-11-19 14:14:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2021-11-19 14:14:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-19 14:14:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:48,040 INFO L225 Difference]: With dead ends: 13768 [2021-11-19 14:14:48,041 INFO L226 Difference]: Without dead ends: 13767 [2021-11-19 14:14:48,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30092 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=37097, Invalid=89995, Unknown=0, NotChecked=0, Total=127092 [2021-11-19 14:14:48,059 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 6300 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 1520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6302 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1520 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:48,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6302 Valid, 2414 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1520 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:14:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13767 states. [2021-11-19 14:14:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13767 to 13673. [2021-11-19 14:14:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13673 states, 11666 states have (on average 1.0143151037202125) internal successors, (11833), 11645 states have internal predecessors, (11833), 96 states have call successors, (96), 95 states have call predecessors, (96), 1909 states have return successors, (1932), 1932 states have call predecessors, (1932), 95 states have call successors, (1932) [2021-11-19 14:14:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13673 states to 13673 states and 13861 transitions. [2021-11-19 14:14:48,474 INFO L78 Accepts]: Start accepts. Automaton has 13673 states and 13861 transitions. Word has length 237 [2021-11-19 14:14:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:48,474 INFO L470 AbstractCegarLoop]: Abstraction has 13673 states and 13861 transitions. [2021-11-19 14:14:48,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13673 states and 13861 transitions. [2021-11-19 14:14:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-19 14:14:48,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:48,490 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2021-11-19 14:14:48,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:48,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 14:14:48,710 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:14:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash -100933086, now seen corresponding path program 4 times [2021-11-19 14:14:48,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:48,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332217180] [2021-11-19 14:14:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:48,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-11-19 14:14:49,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:49,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332217180] [2021-11-19 14:14:49,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332217180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:49,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697083896] [2021-11-19 14:14:49,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:14:49,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:49,659 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:49,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:14:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 14:14:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-11-19 14:14:50,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-11-19 14:15:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697083896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:25,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096036888] [2021-11-19 14:15:25,847 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-19 14:15:25,848 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:15:25,848 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:15:25,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:15:25,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 63 [2021-11-19 14:15:25,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656468914] [2021-11-19 14:15:25,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:25,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-19 14:15:25,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:15:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-19 14:15:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 14:15:25,853 INFO L87 Difference]: Start difference. First operand 13673 states and 13861 transitions. Second operand has 64 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-19 14:15:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:26,177 INFO L93 Difference]: Finished difference Result 18954 states and 19901 transitions. [2021-11-19 14:15:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-19 14:15:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) Word has length 278 [2021-11-19 14:15:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:26,235 INFO L225 Difference]: With dead ends: 18954 [2021-11-19 14:15:26,235 INFO L226 Difference]: Without dead ends: 17493 [2021-11-19 14:15:26,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 501 SyntacticMatches, 38 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 14:15:26,248 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:26,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 123 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17493 states. [2021-11-19 14:15:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17493 to 17493. [2021-11-19 14:15:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17493 states, 14946 states have (on average 1.0106382978723405) internal successors, (15105), 14917 states have internal predecessors, (15105), 96 states have call successors, (96), 95 states have call predecessors, (96), 2449 states have return successors, (2480), 2480 states have call predecessors, (2480), 95 states have call successors, (2480) [2021-11-19 14:15:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17493 states to 17493 states and 17681 transitions. [2021-11-19 14:15:26,669 INFO L78 Accepts]: Start accepts. Automaton has 17493 states and 17681 transitions. Word has length 278 [2021-11-19 14:15:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:26,669 INFO L470 AbstractCegarLoop]: Abstraction has 17493 states and 17681 transitions. [2021-11-19 14:15:26,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-19 14:15:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 17493 states and 17681 transitions. [2021-11-19 14:15:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-19 14:15:26,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:26,691 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1] [2021-11-19 14:15:26,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:26,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:26,907 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:15:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash -123746782, now seen corresponding path program 5 times [2021-11-19 14:15:26,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:15:26,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244341177] [2021-11-19 14:15:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:26,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:15:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 152 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2021-11-19 14:15:27,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:15:27,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244341177] [2021-11-19 14:15:27,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244341177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:27,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455884835] [2021-11-19 14:15:27,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:15:27,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:27,895 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:27,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 14:15:28,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-19 14:15:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-19 14:15:28,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 152 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2021-11-19 14:15:29,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 1922 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-19 14:17:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455884835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600309756] [2021-11-19 14:17:08,293 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-19 14:17:08,293 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:17:08,294 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:17:08,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:17:08,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 67] total 68 [2021-11-19 14:17:08,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242369400] [2021-11-19 14:17:08,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:17:08,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-19 14:17:08,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-19 14:17:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1125, Invalid=3431, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 14:17:08,300 INFO L87 Difference]: Start difference. First operand 17493 states and 17681 transitions. Second operand has 68 states, 67 states have (on average 4.7164179104477615) internal successors, (316), 67 states have internal predecessors, (316), 33 states have call successors, (33), 2 states have call predecessors, (33), 31 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2021-11-19 14:17:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:09,187 INFO L93 Difference]: Finished difference Result 17963 states and 18152 transitions. [2021-11-19 14:17:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 14:17:09,188 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.7164179104477615) internal successors, (316), 67 states have internal predecessors, (316), 33 states have call successors, (33), 2 states have call predecessors, (33), 31 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) Word has length 374 [2021-11-19 14:17:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:09,194 INFO L225 Difference]: With dead ends: 17963 [2021-11-19 14:17:09,194 INFO L226 Difference]: Without dead ends: 479 [2021-11-19 14:17:09,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 745 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3269, Invalid=6631, Unknown=0, NotChecked=0, Total=9900 [2021-11-19 14:17:09,222 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 228 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:09,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 902 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-19 14:17:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2021-11-19 14:17:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 382 states have (on average 1.0026178010471205) internal successors, (383), 382 states have internal predecessors, (383), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:17:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2021-11-19 14:17:09,243 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 374 [2021-11-19 14:17:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:09,244 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2021-11-19 14:17:09,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.7164179104477615) internal successors, (316), 67 states have internal predecessors, (316), 33 states have call successors, (33), 2 states have call predecessors, (33), 31 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2021-11-19 14:17:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2021-11-19 14:17:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-19 14:17:09,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:09,256 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1] [2021-11-19 14:17:09,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:09,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 14:17:09,470 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:17:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -886767873, now seen corresponding path program 6 times [2021-11-19 14:17:09,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:09,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860513172] [2021-11-19 14:17:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:09,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:19,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860513172] [2021-11-19 14:17:19,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860513172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516383875] [2021-11-19 14:17:19,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:17:19,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:19,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:19,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:19,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 14:17:21,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:17:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:17:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-19 14:17:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:22,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:46,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516383875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:46,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816489558] [2021-11-19 14:17:46,968 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:17:46,968 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:17:46,968 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:17:46,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:17:46,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-19 14:17:46,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815850918] [2021-11-19 14:17:46,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:17:46,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-19 14:17:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-19 14:17:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2021-11-19 14:17:46,992 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:18:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:22,358 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2021-11-19 14:18:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-19 14:18:22,359 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-11-19 14:18:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:22,363 INFO L225 Difference]: With dead ends: 960 [2021-11-19 14:18:22,363 INFO L226 Difference]: Without dead ends: 959 [2021-11-19 14:18:22,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2021-11-19 14:18:22,384 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3846 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3846 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:22,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3846 Valid, 35 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:18:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-19 14:18:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2021-11-19 14:18:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 766 states have (on average 1.0013054830287207) internal successors, (767), 766 states have internal predecessors, (767), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:18:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2021-11-19 14:18:22,417 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 477 [2021-11-19 14:18:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:22,418 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2021-11-19 14:18:22,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:18:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2021-11-19 14:18:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-11-19 14:18:22,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:22,452 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1] [2021-11-19 14:18:22,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 14:18:22,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:18:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1002675457, now seen corresponding path program 7 times [2021-11-19 14:18:22,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:18:22,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779976116] [2021-11-19 14:18:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:22,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:18:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:19:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:19:00,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:19:00,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779976116] [2021-11-19 14:19:00,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779976116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:19:00,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317292039] [2021-11-19 14:19:00,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:19:00,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:19:00,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:19:00,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:19:00,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97af8329-ab3a-4303-9ba4-38e7af6741fc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:19:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:19:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-19 14:19:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:19:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:19:04,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:51,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317292039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:20:51,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343307391] [2021-11-19 14:20:51,046 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:20:51,047 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:20:51,047 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-19 14:20:51,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:20:51,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-19 14:20:51,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361533301] [2021-11-19 14:20:51,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:20:51,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-19 14:20:51,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:20:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-19 14:20:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2021-11-19 14:20:51,138 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 768 states, 765 states have (on average 2.0013071895424837) internal successors, (1531), 386 states have internal predecessors, (1531), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)