./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/recHanoi03-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi03-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH --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 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:47:58,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:47:58,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:47:58,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:47:58,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:47:58,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:47:58,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:47:58,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:47:58,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:47:58,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:47:58,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:47:58,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:47:58,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:47:58,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:47:58,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:47:58,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:47:58,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:47:58,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:47:58,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:47:58,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:47:58,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:47:58,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:47:58,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:47:58,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:47:58,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:47:58,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:47:58,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:47:58,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:47:58,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:47:58,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:47:58,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:47:58,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:47:58,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:47:58,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:47:58,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:47:58,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:47:58,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:47:58,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:47:58,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:47:58,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:47:58,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:47:58,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-03 03:47:58,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:47:58,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:47:58,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:47:58,652 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:47:58,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:47:58,652 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:47:58,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:47:58,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:47:58,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:47:58,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:47:58,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:47:58,654 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:47:58,655 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:47:58,655 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:47:58,655 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:47:58,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:47:58,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:47:58,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:47:58,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:47:58,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:47:58,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:47:58,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:47:58,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:47:58,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:47:58,657 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-03 03:47:58,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:47:58,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:47:58,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:47:58,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:47:58,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:47:58,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:47:58,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:47:58,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:47:58,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:47:58,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:47:58,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:47:58,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:47:58,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:47:58,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:47:58,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:47:58,661 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_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2021-11-03 03:47:58,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:47:58,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:47:58,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:47:58,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:47:58,921 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:47:58,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/recursive/recHanoi03-2.c [2021-11-03 03:47:59,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/data/05e2b6e9b/ddb2890cfa3d452692e47ad8804e17eb/FLAG534e4556f [2021-11-03 03:47:59,480 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:47:59,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/sv-benchmarks/c/recursive/recHanoi03-2.c [2021-11-03 03:47:59,486 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/data/05e2b6e9b/ddb2890cfa3d452692e47ad8804e17eb/FLAG534e4556f [2021-11-03 03:47:59,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/data/05e2b6e9b/ddb2890cfa3d452692e47ad8804e17eb [2021-11-03 03:47:59,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:47:59,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:47:59,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:47:59,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:47:59,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:47:59,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29260108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59, skipping insertion in model container [2021-11-03 03:47:59,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:47:59,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:48:00,055 WARN L228 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_2014b2ef-8861-43d9-81d7-cb5cdf79974d/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2021-11-03 03:48:00,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:48:00,063 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:48:00,078 WARN L228 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_2014b2ef-8861-43d9-81d7-cb5cdf79974d/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2021-11-03 03:48:00,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:48:00,091 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:48:00,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00 WrapperNode [2021-11-03 03:48:00,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:48:00,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:48:00,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:48:00,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:48:00,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:48:00,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:48:00,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:48:00,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:48:00,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:48:00,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:48:00,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:48:00,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:48:00,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (1/1) ... [2021-11-03 03:48:00,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:48:00,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:00,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:48:00,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:48:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-03 03:48:00,215 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-03 03:48:00,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:48:00,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:48:00,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:48:00,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:48:00,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:48:00,443 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:48:00,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:00 BoogieIcfgContainer [2021-11-03 03:48:00,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:48:00,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:48:00,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:48:00,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:48:00,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:59" (1/3) ... [2021-11-03 03:48:00,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f89f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:00, skipping insertion in model container [2021-11-03 03:48:00,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:00" (2/3) ... [2021-11-03 03:48:00,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f89f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:00, skipping insertion in model container [2021-11-03 03:48:00,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:00" (3/3) ... [2021-11-03 03:48:00,473 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2021-11-03 03:48:00,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:48:00,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-03 03:48:00,540 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:48:00,564 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 [2021-11-03 03:48:00,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-03 03:48:00,588 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) [2021-11-03 03:48:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:48:00,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:00,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:48:00,594 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2121594553, now seen corresponding path program 1 times [2021-11-03 03:48:00,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:00,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516184029] [2021-11-03 03:48:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:00,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:00,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:00,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516184029] [2021-11-03 03:48:00,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516184029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:48:00,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:48:00,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:48:00,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238405460] [2021-11-03 03:48:00,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:48:00,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:48:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:48:00,853 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) [2021-11-03 03:48:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:00,946 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-03 03:48:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:48:00,948 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 [2021-11-03 03:48:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:00,955 INFO L225 Difference]: With dead ends: 26 [2021-11-03 03:48:00,955 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 03:48:00,958 INFO L786 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 [2021-11-03 03:48:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 03:48:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-03 03:48:00,989 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) [2021-11-03 03:48:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-03 03:48:00,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-11-03 03:48:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:00,992 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-03 03:48:00,992 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) [2021-11-03 03:48:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-03 03:48:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 03:48:00,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:00,993 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:00,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:48:00,994 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1344921665, now seen corresponding path program 1 times [2021-11-03 03:48:00,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:00,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519527308] [2021-11-03 03:48:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:00,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:01,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519527308] [2021-11-03 03:48:01,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519527308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:48:01,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:48:01,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:48:01,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389820894] [2021-11-03 03:48:01,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:48:01,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:48:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:48:01,053 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) [2021-11-03 03:48:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:01,119 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-11-03 03:48:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:48:01,120 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 [2021-11-03 03:48:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:01,122 INFO L225 Difference]: With dead ends: 39 [2021-11-03 03:48:01,122 INFO L226 Difference]: Without dead ends: 36 [2021-11-03 03:48:01,123 INFO L786 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 [2021-11-03 03:48:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-03 03:48:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-03 03:48:01,130 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) [2021-11-03 03:48:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-03 03:48:01,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2021-11-03 03:48:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:01,132 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-03 03:48:01,132 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) [2021-11-03 03:48:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-03 03:48:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:48:01,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:01,134 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:01,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:48:01,134 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -168070099, now seen corresponding path program 1 times [2021-11-03 03:48:01,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:01,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624172903] [2021-11-03 03:48:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:01,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:01,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624172903] [2021-11-03 03:48:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624172903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:01,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575097249] [2021-11-03 03:48:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:01,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:01,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:01,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:48:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:48:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575097249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:01,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705270849] [2021-11-03 03:48:01,495 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:48:01,496 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:01,502 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:609) 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) [2021-11-03 03:48:01,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:01,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-03 03:48:01,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704314877] [2021-11-03 03:48:01,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 03:48:01,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 03:48:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:48:01,508 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) [2021-11-03 03:48:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:01,701 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-11-03 03:48:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 03:48:01,702 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 [2021-11-03 03:48:01,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:01,707 INFO L225 Difference]: With dead ends: 91 [2021-11-03 03:48:01,707 INFO L226 Difference]: Without dead ends: 90 [2021-11-03 03:48:01,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:48:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-03 03:48:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-11-03 03:48:01,728 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) [2021-11-03 03:48:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2021-11-03 03:48:01,730 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 12 [2021-11-03 03:48:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:01,730 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-11-03 03:48:01,731 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) [2021-11-03 03:48:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2021-11-03 03:48:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 03:48:01,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:01,732 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:01,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:01,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:01,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1692888866, now seen corresponding path program 1 times [2021-11-03 03:48:01,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:01,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867645130] [2021-11-03 03:48:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:01,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 03:48:01,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:01,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867645130] [2021-11-03 03:48:01,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867645130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:48:01,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:48:01,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:48:01,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931623243] [2021-11-03 03:48:01,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:48:01,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:48:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:48:02,000 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) [2021-11-03 03:48:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:02,038 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2021-11-03 03:48:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:48:02,038 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 [2021-11-03 03:48:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:02,045 INFO L225 Difference]: With dead ends: 103 [2021-11-03 03:48:02,046 INFO L226 Difference]: Without dead ends: 92 [2021-11-03 03:48:02,046 INFO L786 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 [2021-11-03 03:48:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-03 03:48:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-03 03:48:02,068 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) [2021-11-03 03:48:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2021-11-03 03:48:02,076 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 14 [2021-11-03 03:48:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:02,076 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2021-11-03 03:48:02,076 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) [2021-11-03 03:48:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2021-11-03 03:48:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:48:02,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:02,079 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-11-03 03:48:02,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:48:02,080 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1195792703, now seen corresponding path program 2 times [2021-11-03 03:48:02,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:02,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211126469] [2021-11-03 03:48:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:02,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:02,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:02,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211126469] [2021-11-03 03:48:02,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211126469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:02,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025781123] [2021-11-03 03:48:02,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:48:02,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:02,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:02,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 03:48:02,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 03:48:02,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 03:48:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:02,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:02,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025781123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:02,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068530086] [2021-11-03 03:48:02,714 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:48:02,714 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:02,714 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:609) 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) [2021-11-03 03:48:02,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:02,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-03 03:48:02,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643100358] [2021-11-03 03:48:02,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 03:48:02,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 03:48:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-03 03:48:02,722 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) [2021-11-03 03:48:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:03,164 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2021-11-03 03:48:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 03:48:03,165 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 [2021-11-03 03:48:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:03,169 INFO L225 Difference]: With dead ends: 247 [2021-11-03 03:48:03,169 INFO L226 Difference]: Without dead ends: 246 [2021-11-03 03:48:03,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=1207, Unknown=0, NotChecked=0, Total=1722 [2021-11-03 03:48:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-03 03:48:03,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 206. [2021-11-03 03:48:03,207 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) [2021-11-03 03:48:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2021-11-03 03:48:03,216 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 27 [2021-11-03 03:48:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:03,217 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2021-11-03 03:48:03,217 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) [2021-11-03 03:48:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2021-11-03 03:48:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 03:48:03,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:03,219 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:03,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:03,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:03,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 753695794, now seen corresponding path program 1 times [2021-11-03 03:48:03,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:03,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320934666] [2021-11-03 03:48:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:03,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 03:48:03,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:03,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320934666] [2021-11-03 03:48:03,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320934666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:03,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978624796] [2021-11-03 03:48:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:03,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:03,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:03,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 03:48:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:03,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:48:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 03:48:03,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 03:48:03,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978624796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85748198] [2021-11-03 03:48:03,836 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 03:48:03,836 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:03,836 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:609) 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) [2021-11-03 03:48:03,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:03,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-03 03:48:03,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749398008] [2021-11-03 03:48:03,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 03:48:03,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:03,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 03:48:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:48:03,840 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) [2021-11-03 03:48:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:03,903 INFO L93 Difference]: Finished difference Result 399 states and 548 transitions. [2021-11-03 03:48:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:48:03,904 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 [2021-11-03 03:48:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:03,914 INFO L225 Difference]: With dead ends: 399 [2021-11-03 03:48:03,914 INFO L226 Difference]: Without dead ends: 397 [2021-11-03 03:48:03,915 INFO L786 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 [2021-11-03 03:48:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-03 03:48:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 376. [2021-11-03 03:48:03,952 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) [2021-11-03 03:48:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 457 transitions. [2021-11-03 03:48:03,963 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 457 transitions. Word has length 26 [2021-11-03 03:48:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:03,963 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 457 transitions. [2021-11-03 03:48:03,964 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) [2021-11-03 03:48:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 457 transitions. [2021-11-03 03:48:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:48:03,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:03,965 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:03,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:04,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-03 03:48:04,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting hanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1889733178, now seen corresponding path program 1 times [2021-11-03 03:48:04,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:04,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122498277] [2021-11-03 03:48:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:04,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 03:48:04,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:04,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122498277] [2021-11-03 03:48:04,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122498277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:04,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947368432] [2021-11-03 03:48:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:04,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:04,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 03:48:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:04,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:48:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 03:48:04,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 03:48:04,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947368432] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:04,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:48:04,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2021-11-03 03:48:04,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214181113] [2021-11-03 03:48:04,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:48:04,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:48:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:48:04,598 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) [2021-11-03 03:48:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:04,626 INFO L93 Difference]: Finished difference Result 376 states and 457 transitions. [2021-11-03 03:48:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:48:04,626 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 [2021-11-03 03:48:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:04,629 INFO L225 Difference]: With dead ends: 376 [2021-11-03 03:48:04,630 INFO L226 Difference]: Without dead ends: 332 [2021-11-03 03:48:04,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:48:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-03 03:48:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-11-03 03:48:04,645 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) [2021-11-03 03:48:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 352 transitions. [2021-11-03 03:48:04,650 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 352 transitions. Word has length 27 [2021-11-03 03:48:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:04,652 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 352 transitions. [2021-11-03 03:48:04,653 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) [2021-11-03 03:48:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 352 transitions. [2021-11-03 03:48:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 03:48:04,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:04,662 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1] [2021-11-03 03:48:04,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:04,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-03 03:48:04,877 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2009114495, now seen corresponding path program 3 times [2021-11-03 03:48:04,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:04,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125891261] [2021-11-03 03:48:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:04,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:05,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:05,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125891261] [2021-11-03 03:48:05,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125891261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:05,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120564252] [2021-11-03 03:48:05,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:48:05,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:05,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:05,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 03:48:05,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:48:05,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 03:48:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:05,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:06,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120564252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:06,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492720433] [2021-11-03 03:48:06,185 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:48:06,185 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:06,185 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:609) 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) [2021-11-03 03:48:06,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:06,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-03 03:48:06,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883216254] [2021-11-03 03:48:06,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-03 03:48:06,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-03 03:48:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-11-03 03:48:06,189 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) [2021-11-03 03:48:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:07,320 INFO L93 Difference]: Finished difference Result 799 states and 832 transitions. [2021-11-03 03:48:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-03 03:48:07,320 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 [2021-11-03 03:48:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:07,329 INFO L225 Difference]: With dead ends: 799 [2021-11-03 03:48:07,329 INFO L226 Difference]: Without dead ends: 798 [2021-11-03 03:48:07,335 INFO L786 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 [2021-11-03 03:48:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-03 03:48:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 776. [2021-11-03 03:48:07,366 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) [2021-11-03 03:48:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 820 transitions. [2021-11-03 03:48:07,371 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 820 transitions. Word has length 57 [2021-11-03 03:48:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:07,371 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 820 transitions. [2021-11-03 03:48:07,372 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) [2021-11-03 03:48:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 820 transitions. [2021-11-03 03:48:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 03:48:07,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:07,375 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 03:48:07,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:07,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-03 03:48:07,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash -769826526, now seen corresponding path program 2 times [2021-11-03 03:48:07,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:07,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128762222] [2021-11-03 03:48:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:07,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-03 03:48:07,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:07,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128762222] [2021-11-03 03:48:07,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128762222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:07,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224362048] [2021-11-03 03:48:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:48:07,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:07,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:07,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:07,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 03:48:07,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 03:48:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 03:48:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-03 03:48:08,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-03 03:48:08,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224362048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:08,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186435258] [2021-11-03 03:48:08,720 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 03:48:08,720 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:08,720 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:609) 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) [2021-11-03 03:48:08,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:08,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-11-03 03:48:08,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272439894] [2021-11-03 03:48:08,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 03:48:08,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 03:48:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-03 03:48:08,724 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) [2021-11-03 03:48:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:08,820 INFO L93 Difference]: Finished difference Result 1713 states and 1894 transitions. [2021-11-03 03:48:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 03:48:08,820 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 [2021-11-03 03:48:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:08,828 INFO L225 Difference]: With dead ends: 1713 [2021-11-03 03:48:08,828 INFO L226 Difference]: Without dead ends: 1415 [2021-11-03 03:48:08,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-03 03:48:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-11-03 03:48:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1415. [2021-11-03 03:48:08,870 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) [2021-11-03 03:48:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 1459 transitions. [2021-11-03 03:48:08,879 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 1459 transitions. Word has length 62 [2021-11-03 03:48:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:08,879 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 1459 transitions. [2021-11-03 03:48:08,879 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) [2021-11-03 03:48:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 1459 transitions. [2021-11-03 03:48:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 03:48:08,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:08,882 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1] [2021-11-03 03:48:08,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:09,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:09,097 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1606022143, now seen corresponding path program 4 times [2021-11-03 03:48:09,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:09,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714399926] [2021-11-03 03:48:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:09,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:10,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:10,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714399926] [2021-11-03 03:48:10,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714399926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:10,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730993499] [2021-11-03 03:48:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 03:48:10,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:10,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:10,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 03:48:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 03:48:10,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:10,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730993499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:12,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681806732] [2021-11-03 03:48:12,863 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:48:12,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:12,864 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:609) 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) [2021-11-03 03:48:12,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:12,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-03 03:48:12,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145117709] [2021-11-03 03:48:12,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-03 03:48:12,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-03 03:48:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-11-03 03:48:12,872 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) [2021-11-03 03:48:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:16,454 INFO L93 Difference]: Finished difference Result 3358 states and 3427 transitions. [2021-11-03 03:48:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-03 03:48:16,455 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 [2021-11-03 03:48:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:16,470 INFO L225 Difference]: With dead ends: 3358 [2021-11-03 03:48:16,471 INFO L226 Difference]: Without dead ends: 3357 [2021-11-03 03:48:16,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7136 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9119, Invalid=22033, Unknown=0, NotChecked=0, Total=31152 [2021-11-03 03:48:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-11-03 03:48:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3311. [2021-11-03 03:48:16,565 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) [2021-11-03 03:48:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 3403 transitions. [2021-11-03 03:48:16,580 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 3403 transitions. Word has length 117 [2021-11-03 03:48:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:16,580 INFO L470 AbstractCegarLoop]: Abstraction has 3311 states and 3403 transitions. [2021-11-03 03:48:16,581 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) [2021-11-03 03:48:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 3403 transitions. [2021-11-03 03:48:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:48:16,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:16,590 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 03:48:16,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-03 03:48:16,815 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash 747703330, now seen corresponding path program 3 times [2021-11-03 03:48:16,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:16,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672710796] [2021-11-03 03:48:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:16,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-03 03:48:17,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:17,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672710796] [2021-11-03 03:48:17,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672710796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:17,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971975331] [2021-11-03 03:48:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:48:17,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:17,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:17,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:17,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 03:48:17,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:48:17,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 03:48:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-03 03:48:17,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-03 03:48:22,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971975331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:22,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125912345] [2021-11-03 03:48:22,122 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 03:48:22,122 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:22,122 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:609) 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) [2021-11-03 03:48:22,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:22,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2021-11-03 03:48:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748689354] [2021-11-03 03:48:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-03 03:48:22,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-03 03:48:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-11-03 03:48:22,126 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) [2021-11-03 03:48:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:22,350 INFO L93 Difference]: Finished difference Result 7200 states and 7855 transitions. [2021-11-03 03:48:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-03 03:48:22,350 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 [2021-11-03 03:48:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:22,376 INFO L225 Difference]: With dead ends: 7200 [2021-11-03 03:48:22,376 INFO L226 Difference]: Without dead ends: 5849 [2021-11-03 03:48:22,381 INFO L786 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 [2021-11-03 03:48:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-11-03 03:48:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5849. [2021-11-03 03:48:22,549 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) [2021-11-03 03:48:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 5941 transitions. [2021-11-03 03:48:22,573 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 5941 transitions. Word has length 134 [2021-11-03 03:48:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:22,574 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 5941 transitions. [2021-11-03 03:48:22,574 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) [2021-11-03 03:48:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 5941 transitions. [2021-11-03 03:48:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-03 03:48:22,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:22,583 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1] [2021-11-03 03:48:22,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:22,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:22,805 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash 464473343, now seen corresponding path program 5 times [2021-11-03 03:48:22,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:22,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859928949] [2021-11-03 03:48:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:22,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:25,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:25,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859928949] [2021-11-03 03:48:25,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859928949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:25,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215336027] [2021-11-03 03:48:25,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:48:25,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:25,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:25,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 03:48:26,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-03 03:48:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:26,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-03 03:48:26,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:27,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:33,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215336027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:33,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573879025] [2021-11-03 03:48:33,516 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:48:33,516 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:33,517 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:609) 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) [2021-11-03 03:48:33,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:48:33,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-03 03:48:33,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745713646] [2021-11-03 03:48:33,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-03 03:48:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-03 03:48:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2021-11-03 03:48:33,527 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) [2021-11-03 03:48:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:47,451 INFO L93 Difference]: Finished difference Result 13768 states and 13909 transitions. [2021-11-03 03:48:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2021-11-03 03:48:47,454 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 [2021-11-03 03:48:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:47,515 INFO L225 Difference]: With dead ends: 13768 [2021-11-03 03:48:47,515 INFO L226 Difference]: Without dead ends: 13767 [2021-11-03 03:48:47,533 INFO L786 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 [2021-11-03 03:48:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13767 states. [2021-11-03 03:48:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13767 to 13673. [2021-11-03 03:48:47,909 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) [2021-11-03 03:48:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13673 states to 13673 states and 13861 transitions. [2021-11-03 03:48:47,952 INFO L78 Accepts]: Start accepts. Automaton has 13673 states and 13861 transitions. Word has length 237 [2021-11-03 03:48:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:47,953 INFO L470 AbstractCegarLoop]: Abstraction has 13673 states and 13861 transitions. [2021-11-03 03:48:47,954 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) [2021-11-03 03:48:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 13673 states and 13861 transitions. [2021-11-03 03:48:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-03 03:48:47,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:47,966 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2021-11-03 03:48:48,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:48,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-03 03:48:48,193 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:48:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash -100933086, now seen corresponding path program 4 times [2021-11-03 03:48:48,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:48:48,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533254882] [2021-11-03 03:48:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:48,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:48:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-11-03 03:48:49,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:49,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533254882] [2021-11-03 03:48:49,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533254882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:48:49,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585249970] [2021-11-03 03:48:49,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 03:48:49,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:49,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:49,077 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:49,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 03:48:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-03 03:48:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-11-03 03:48:50,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-11-03 03:49:24,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585249970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:49:24,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307430885] [2021-11-03 03:49:24,245 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 03:49:24,246 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:49:24,246 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:609) 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) [2021-11-03 03:49:24,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:49:24,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 63 [2021-11-03 03:49:24,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776117834] [2021-11-03 03:49:24,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-03 03:49:24,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:49:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-03 03:49:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 03:49:24,251 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) [2021-11-03 03:49:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:24,562 INFO L93 Difference]: Finished difference Result 18954 states and 19901 transitions. [2021-11-03 03:49:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-03 03:49:24,562 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 [2021-11-03 03:49:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:24,639 INFO L225 Difference]: With dead ends: 18954 [2021-11-03 03:49:24,639 INFO L226 Difference]: Without dead ends: 17493 [2021-11-03 03:49:24,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 501 SyntacticMatches, 38 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 03:49:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17493 states. [2021-11-03 03:49:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17493 to 17493. [2021-11-03 03:49:25,012 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) [2021-11-03 03:49:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17493 states to 17493 states and 17681 transitions. [2021-11-03 03:49:25,053 INFO L78 Accepts]: Start accepts. Automaton has 17493 states and 17681 transitions. Word has length 278 [2021-11-03 03:49:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:25,053 INFO L470 AbstractCegarLoop]: Abstraction has 17493 states and 17681 transitions. [2021-11-03 03:49:25,054 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) [2021-11-03 03:49:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 17493 states and 17681 transitions. [2021-11-03 03:49:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-03 03:49:25,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:25,075 INFO L513 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1] [2021-11-03 03:49:25,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:25,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-03 03:49:25,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:49:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash -123746782, now seen corresponding path program 5 times [2021-11-03 03:49:25,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:49:25,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248024383] [2021-11-03 03:49:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:25,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:49:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 152 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2021-11-03 03:49:26,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:49:26,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248024383] [2021-11-03 03:49:26,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248024383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:49:26,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594686461] [2021-11-03 03:49:26,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:49:26,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:49:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:49:26,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:49:26,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-03 03:49:27,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-03 03:49:27,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:49:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-03 03:49:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 152 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2021-11-03 03:49:28,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 1922 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-03 03:51:08,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594686461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:51:08,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203709724] [2021-11-03 03:51:08,356 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 03:51:08,356 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:51:08,357 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:609) 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) [2021-11-03 03:51:08,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:51:08,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 67] total 68 [2021-11-03 03:51:08,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160099187] [2021-11-03 03:51:08,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-03 03:51:08,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:51:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-03 03:51:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1125, Invalid=3431, Unknown=0, NotChecked=0, Total=4556 [2021-11-03 03:51:08,374 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) [2021-11-03 03:51:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:09,154 INFO L93 Difference]: Finished difference Result 17963 states and 18152 transitions. [2021-11-03 03:51:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-03 03:51:09,155 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 [2021-11-03 03:51:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:09,160 INFO L225 Difference]: With dead ends: 17963 [2021-11-03 03:51:09,160 INFO L226 Difference]: Without dead ends: 479 [2021-11-03 03:51:09,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 745 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3269, Invalid=6631, Unknown=0, NotChecked=0, Total=9900 [2021-11-03 03:51:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-03 03:51:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2021-11-03 03:51:09,205 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) [2021-11-03 03:51:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2021-11-03 03:51:09,207 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 374 [2021-11-03 03:51:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:09,207 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2021-11-03 03:51:09,208 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) [2021-11-03 03:51:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2021-11-03 03:51:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-03 03:51:09,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:09,218 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1] [2021-11-03 03:51:09,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:09,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:51:09,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:51:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:09,442 INFO L85 PathProgramCache]: Analyzing trace with hash -886767873, now seen corresponding path program 6 times [2021-11-03 03:51:09,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:51:09,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885205460] [2021-11-03 03:51:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:09,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:51:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:19,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:51:19,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885205460] [2021-11-03 03:51:19,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885205460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:51:19,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664553565] [2021-11-03 03:51:19,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:51:19,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:51:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:51:19,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:51:19,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-03 03:51:22,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:51:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:51:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-03 03:51:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:23,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:49,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664553565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:51:49,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981942467] [2021-11-03 03:51:49,911 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:51:49,911 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:51:49,911 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:609) 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) [2021-11-03 03:51:49,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:51:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-03 03:51:49,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325624626] [2021-11-03 03:51:49,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-03 03:51:49,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:51:49,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-03 03:51:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2021-11-03 03:51:49,942 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) [2021-11-03 03:52:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:23,946 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2021-11-03 03:52:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-03 03:52:23,946 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 [2021-11-03 03:52:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:23,950 INFO L225 Difference]: With dead ends: 960 [2021-11-03 03:52:23,950 INFO L226 Difference]: Without dead ends: 959 [2021-11-03 03:52:23,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2021-11-03 03:52:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-03 03:52:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2021-11-03 03:52:24,006 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) [2021-11-03 03:52:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2021-11-03 03:52:24,008 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 477 [2021-11-03 03:52:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2021-11-03 03:52:24,010 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) [2021-11-03 03:52:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2021-11-03 03:52:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-11-03 03:52:24,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:24,044 INFO L513 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1] [2021-11-03 03:52:24,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:24,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 03:52:24,257 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 03:52:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1002675457, now seen corresponding path program 7 times [2021-11-03 03:52:24,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:52:24,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346368671] [2021-11-03 03:52:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:24,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:52:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:03,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:53:03,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346368671] [2021-11-03 03:53:03,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346368671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:53:03,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267750852] [2021-11-03 03:53:03,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 03:53:03,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:04,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:53:04,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2014b2ef-8861-43d9-81d7-cb5cdf79974d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-03 03:53:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-03 03:53:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:10,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:54:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:53,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267750852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:54:53,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925143551] [2021-11-03 03:54:53,453 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:54:53,453 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:54:53,453 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:609) 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) [2021-11-03 03:54:53,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:54:53,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-03 03:54:53,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464421653] [2021-11-03 03:54:53,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-03 03:54:53,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-03 03:54:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2021-11-03 03:54:53,552 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)