./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:31:43,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:31:43,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:31:43,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:31:43,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:31:43,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:31:43,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:31:43,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:31:43,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:31:43,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:31:43,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:31:43,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:31:43,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:31:43,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:31:43,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:31:43,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:31:43,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:31:43,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:31:43,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:31:43,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:31:43,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:31:43,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:31:43,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:31:43,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:31:43,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:31:43,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:31:43,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:31:43,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:31:43,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:31:43,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:31:43,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:31:43,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:31:43,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:31:43,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:31:43,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:31:43,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:31:43,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:31:43,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:31:43,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:31:43,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:31:43,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:31:43,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:31:43,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:31:43,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:31:43,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:31:43,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:31:43,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:31:43,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:31:43,672 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:31:43,672 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:31:43,672 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:31:43,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:31:43,673 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:31:43,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:31:43,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:31:43,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:31:43,674 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:31:43,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:31:43,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:31:43,675 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:31:43,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:31:43,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:31:43,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:31:43,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:31:43,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:31:43,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:31:43,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:31:43,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:31:43,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:31:43,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:31:43,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:31:43,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:31:43,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:31:43,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:31:43,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:31:43,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:31:43,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:31:43,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:31:43,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:31:43,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:31:43,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:31:43,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:31:43,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:31:43,682 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_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 [2021-11-25 19:31:43,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:31:43,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:31:44,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:31:44,002 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:31:44,002 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:31:44,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/recursive/Fibonacci03.c [2021-11-25 19:31:44,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/data/5f24f0b29/16174a0a2d594e789c6267aff4cc80de/FLAG22f9313f6 [2021-11-25 19:31:44,595 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:31:44,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/sv-benchmarks/c/recursive/Fibonacci03.c [2021-11-25 19:31:44,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/data/5f24f0b29/16174a0a2d594e789c6267aff4cc80de/FLAG22f9313f6 [2021-11-25 19:31:44,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/data/5f24f0b29/16174a0a2d594e789c6267aff4cc80de [2021-11-25 19:31:44,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:31:44,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:31:44,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:31:44,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:31:44,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:31:44,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:31:44" (1/1) ... [2021-11-25 19:31:44,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fb9b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:44, skipping insertion in model container [2021-11-25 19:31:44,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:31:44" (1/1) ... [2021-11-25 19:31:45,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:31:45,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:31:45,182 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-11-25 19:31:45,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:31:45,194 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:31:45,210 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-11-25 19:31:45,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:31:45,224 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:31:45,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45 WrapperNode [2021-11-25 19:31:45,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:31:45,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:31:45,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:31:45,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:31:45,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,256 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2021-11-25 19:31:45,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:31:45,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:31:45,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:31:45,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:31:45,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:31:45,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:31:45,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:31:45,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:31:45,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (1/1) ... [2021-11-25 19:31:45,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:31:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:45,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:31:45,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:31:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-11-25 19:31:45,389 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-11-25 19:31:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:31:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:31:45,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:31:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:31:45,449 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:31:45,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:31:45,556 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:31:45,568 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:31:45,568 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:31:45,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:31:45 BoogieIcfgContainer [2021-11-25 19:31:45,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:31:45,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:31:45,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:31:45,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:31:45,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:31:44" (1/3) ... [2021-11-25 19:31:45,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23094103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:31:45, skipping insertion in model container [2021-11-25 19:31:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:45" (2/3) ... [2021-11-25 19:31:45,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23094103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:31:45, skipping insertion in model container [2021-11-25 19:31:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:31:45" (3/3) ... [2021-11-25 19:31:45,580 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2021-11-25 19:31:45,585 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:31:45,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:31:45,633 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:31:45,641 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 [2021-11-25 19:31:45,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:31:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:31:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:31:45,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:45,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:45,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1216674335, now seen corresponding path program 1 times [2021-11-25 19:31:45,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669844434] [2021-11-25 19:31:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:45,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:31:45,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669844434] [2021-11-25 19:31:45,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669844434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:31:45,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:31:45,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:31:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461126607] [2021-11-25 19:31:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:31:45,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:31:45,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:31:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:31:45,992 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:31:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:46,091 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-25 19:31:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:31:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-25 19:31:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:46,103 INFO L225 Difference]: With dead ends: 28 [2021-11-25 19:31:46,104 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:31:46,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:31:46,121 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:46,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:31:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:31:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 19:31:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:31:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-25 19:31:46,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-25 19:31:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:46,186 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-25 19:31:46,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:31:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-25 19:31:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:31:46,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:46,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:46,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:31:46,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1629096597, now seen corresponding path program 1 times [2021-11-25 19:31:46,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:46,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602760967] [2021-11-25 19:31:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:46,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:31:46,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:46,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602760967] [2021-11-25 19:31:46,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602760967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:31:46,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:31:46,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:31:46,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781485430] [2021-11-25 19:31:46,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:31:46,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:31:46,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:31:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:31:46,263 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:31:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:46,341 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-11-25 19:31:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:31:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 19:31:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:46,343 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:31:46,343 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 19:31:46,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:31:46,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:46,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:31:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 19:31:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-25 19:31:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:31:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-25 19:31:46,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-11-25 19:31:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:46,381 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-25 19:31:46,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:31:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-25 19:31:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:31:46,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:46,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:46,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:31:46,387 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 161002844, now seen corresponding path program 1 times [2021-11-25 19:31:46,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:46,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646088662] [2021-11-25 19:31:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:46,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:31:46,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:46,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646088662] [2021-11-25 19:31:46,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646088662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:46,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558785729] [2021-11-25 19:31:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:46,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:46,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:46,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:31:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:31:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:31:46,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:31:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558785729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:46,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495686684] [2021-11-25 19:31:47,009 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:31:47,010 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:47,015 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:31:47,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:47,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2021-11-25 19:31:47,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607338306] [2021-11-25 19:31:47,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:47,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:31:47,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:31:47,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:31:47,032 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 19:31:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:47,176 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-25 19:31:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:31:47,177 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), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 23 [2021-11-25 19:31:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:47,180 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:31:47,180 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 19:31:47,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:31:47,187 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:47,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:31:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 19:31:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-25 19:31:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-25 19:31:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-25 19:31:47,213 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2021-11-25 19:31:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-25 19:31:47,214 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), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 19:31:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-25 19:31:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 19:31:47,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:47,222 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:47,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:47,439 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -801544853, now seen corresponding path program 1 times [2021-11-25 19:31:47,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322106107] [2021-11-25 19:31:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:47,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 19:31:47,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322106107] [2021-11-25 19:31:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322106107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924621208] [2021-11-25 19:31:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:47,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:47,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:47,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:47,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:31:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:47,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:31:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 19:31:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-25 19:31:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924621208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24729970] [2021-11-25 19:31:48,387 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:31:48,388 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:48,388 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:31:48,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:48,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2021-11-25 19:31:48,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409145958] [2021-11-25 19:31:48,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:48,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:31:48,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:31:48,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:31:48,397 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-25 19:31:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:48,536 INFO L93 Difference]: Finished difference Result 44 states and 74 transitions. [2021-11-25 19:31:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:31:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 64 [2021-11-25 19:31:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:48,545 INFO L225 Difference]: With dead ends: 44 [2021-11-25 19:31:48,545 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 19:31:48,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:31:48,550 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:48,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:31:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 19:31:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-25 19:31:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 24 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (30), 9 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-25 19:31:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 60 transitions. [2021-11-25 19:31:48,577 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 60 transitions. Word has length 64 [2021-11-25 19:31:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:48,579 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 60 transitions. [2021-11-25 19:31:48,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-25 19:31:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 60 transitions. [2021-11-25 19:31:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 19:31:48,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:48,596 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 17, 13, 13, 13, 13, 13, 13, 13, 10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:48,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:48,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:48,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash 494319388, now seen corresponding path program 2 times [2021-11-25 19:31:48,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:48,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726530331] [2021-11-25 19:31:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:48,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1852 backedges. 86 proven. 486 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2021-11-25 19:31:49,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726530331] [2021-11-25 19:31:49,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726530331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:49,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527204306] [2021-11-25 19:31:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:31:49,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:49,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:49,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:31:49,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:31:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:31:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:31:49,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1852 backedges. 603 proven. 12 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-11-25 19:31:49,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1852 backedges. 513 proven. 25 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2021-11-25 19:31:50,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527204306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:50,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723041098] [2021-11-25 19:31:50,540 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:31:50,541 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:50,541 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:31:50,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:50,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2021-11-25 19:31:50,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585834394] [2021-11-25 19:31:50,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:31:50,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:31:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:31:50,546 INFO L87 Difference]: Start difference. First operand 35 states and 60 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 11 states have call successors, (14), 2 states have call predecessors, (14), 10 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-25 19:31:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:50,951 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-11-25 19:31:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:31:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 11 states have call successors, (14), 2 states have call predecessors, (14), 10 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) Word has length 183 [2021-11-25 19:31:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:50,954 INFO L225 Difference]: With dead ends: 87 [2021-11-25 19:31:50,954 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 19:31:50,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:31:50,957 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:50,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 92 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:31:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 19:31:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-25 19:31:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-25 19:31:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2021-11-25 19:31:50,968 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 183 [2021-11-25 19:31:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:50,968 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2021-11-25 19:31:50,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 11 states have call successors, (14), 2 states have call predecessors, (14), 10 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-25 19:31:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2021-11-25 19:31:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-25 19:31:50,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:50,972 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:51,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:51,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:51,199 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1752708135, now seen corresponding path program 3 times [2021-11-25 19:31:51,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:51,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138632563] [2021-11-25 19:31:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:51,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-11-25 19:31:51,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138632563] [2021-11-25 19:31:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138632563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713621635] [2021-11-25 19:31:51,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:31:51,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:51,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:51,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:51,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:31:51,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:31:51,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:31:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:31:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 734 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2021-11-25 19:31:52,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 782 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2021-11-25 19:31:54,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713621635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:54,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289508975] [2021-11-25 19:31:54,305 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:31:54,306 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:54,306 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:31:54,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:54,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 23] total 27 [2021-11-25 19:31:54,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624101011] [2021-11-25 19:31:54,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:54,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:31:54,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:54,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:31:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:31:54,311 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 21 states have call successors, (23), 1 states have call predecessors, (23), 13 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2021-11-25 19:31:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:55,007 INFO L93 Difference]: Finished difference Result 134 states and 225 transitions. [2021-11-25 19:31:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 19:31:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 21 states have call successors, (23), 1 states have call predecessors, (23), 13 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) Word has length 201 [2021-11-25 19:31:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:55,022 INFO L225 Difference]: With dead ends: 134 [2021-11-25 19:31:55,022 INFO L226 Difference]: Without dead ends: 82 [2021-11-25 19:31:55,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 388 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=564, Invalid=1692, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:31:55,026 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 341 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:55,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 142 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:31:55,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-25 19:31:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-11-25 19:31:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 53 states have internal predecessors, (59), 13 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-25 19:31:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2021-11-25 19:31:55,057 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 201 [2021-11-25 19:31:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:55,059 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2021-11-25 19:31:55,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 21 states have call successors, (23), 1 states have call predecessors, (23), 13 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2021-11-25 19:31:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2021-11-25 19:31:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-25 19:31:55,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:55,077 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:55,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:55,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:55,278 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 953177853, now seen corresponding path program 4 times [2021-11-25 19:31:55,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:55,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030550241] [2021-11-25 19:31:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:55,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2021-11-25 19:31:55,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030550241] [2021-11-25 19:31:55,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030550241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317397752] [2021-11-25 19:31:55,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:31:55,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:55,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:55,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:55,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:31:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:31:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2021-11-25 19:31:56,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:31:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2021-11-25 19:31:58,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317397752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:31:58,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600357919] [2021-11-25 19:31:58,355 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:31:58,356 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:31:58,356 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:31:58,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:58,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2021-11-25 19:31:58,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924103216] [2021-11-25 19:31:58,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:58,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:31:58,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:31:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:31:58,359 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 15 states have call successors, (17), 1 states have call predecessors, (17), 9 states have return successors, (23), 10 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-25 19:31:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:58,596 INFO L93 Difference]: Finished difference Result 94 states and 138 transitions. [2021-11-25 19:31:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:31:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 15 states have call successors, (17), 1 states have call predecessors, (17), 9 states have return successors, (23), 10 states have call predecessors, (23), 15 states have call successors, (23) Word has length 283 [2021-11-25 19:31:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:58,600 INFO L225 Difference]: With dead ends: 94 [2021-11-25 19:31:58,600 INFO L226 Difference]: Without dead ends: 88 [2021-11-25 19:31:58,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:31:58,602 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 132 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:58,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 85 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:31:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-25 19:31:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-25 19:31:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 59 states have internal predecessors, (65), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (51), 17 states have call predecessors, (51), 15 states have call successors, (51) [2021-11-25 19:31:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 131 transitions. [2021-11-25 19:31:58,617 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 131 transitions. Word has length 283 [2021-11-25 19:31:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:58,619 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 131 transitions. [2021-11-25 19:31:58,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 15 states have call successors, (17), 1 states have call predecessors, (17), 9 states have return successors, (23), 10 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-25 19:31:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 131 transitions. [2021-11-25 19:31:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1169 [2021-11-25 19:31:58,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:58,682 INFO L514 BasicCegarLoop]: trace histogram [171, 171, 138, 85, 85, 85, 85, 85, 85, 85, 53, 33, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:58,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:58,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:58,895 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:31:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash 826976910, now seen corresponding path program 5 times [2021-11-25 19:31:58,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:58,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566327637] [2021-11-25 19:31:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:58,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81873 backedges. 1699 proven. 9031 refuted. 0 times theorem prover too weak. 71143 trivial. 0 not checked. [2021-11-25 19:31:59,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:59,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566327637] [2021-11-25 19:31:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566327637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:59,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688125015] [2021-11-25 19:31:59,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:31:59,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:59,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:59,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:32:00,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2021-11-25 19:32:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:32:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 81873 backedges. 19848 proven. 685 refuted. 0 times theorem prover too weak. 61340 trivial. 0 not checked. [2021-11-25 19:32:01,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 81873 backedges. 6991 proven. 1397 refuted. 0 times theorem prover too weak. 73485 trivial. 0 not checked. [2021-11-25 19:32:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688125015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517158139] [2021-11-25 19:32:06,800 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:32:06,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:06,801 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:32:06,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:06,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 19] total 28 [2021-11-25 19:32:06,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441486517] [2021-11-25 19:32:06,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:06,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:32:06,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:06,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:32:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:32:06,807 INFO L87 Difference]: Start difference. First operand 88 states and 131 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 20 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-25 19:32:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:07,507 INFO L93 Difference]: Finished difference Result 199 states and 344 transitions. [2021-11-25 19:32:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 19:32:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 20 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 1168 [2021-11-25 19:32:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:07,510 INFO L225 Difference]: With dead ends: 199 [2021-11-25 19:32:07,510 INFO L226 Difference]: Without dead ends: 116 [2021-11-25 19:32:07,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2386 GetRequests, 2328 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=717, Invalid=2253, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:32:07,513 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:07,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 132 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:32:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-25 19:32:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2021-11-25 19:32:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 71 states have (on average 1.056338028169014) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 14 states have call predecessors, (18), 10 states have return successors, (46), 17 states have call predecessors, (46), 18 states have call successors, (46) [2021-11-25 19:32:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2021-11-25 19:32:07,528 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 1168 [2021-11-25 19:32:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:07,530 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2021-11-25 19:32:07,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 20 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-25 19:32:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2021-11-25 19:32:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2021-11-25 19:32:07,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:07,556 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:07,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:07,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:32:07,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1965175321, now seen corresponding path program 6 times [2021-11-25 19:32:07,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:07,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689875954] [2021-11-25 19:32:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:07,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3187 proven. 6174 refuted. 0 times theorem prover too weak. 34253 trivial. 0 not checked. [2021-11-25 19:32:08,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689875954] [2021-11-25 19:32:08,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689875954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428729386] [2021-11-25 19:32:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:08,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:08,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:08,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:32:08,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 19:32:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3735 proven. 6599 refuted. 0 times theorem prover too weak. 33280 trivial. 0 not checked. [2021-11-25 19:32:09,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3735 proven. 6746 refuted. 0 times theorem prover too weak. 33133 trivial. 0 not checked. [2021-11-25 19:32:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428729386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505123184] [2021-11-25 19:32:16,510 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:32:16,510 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:16,511 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:32:16,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:16,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 35] total 40 [2021-11-25 19:32:16,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84508941] [2021-11-25 19:32:16,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:16,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 19:32:16,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 19:32:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:32:16,518 INFO L87 Difference]: Start difference. First operand 100 states and 139 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 33 states have call successors, (37), 1 states have call predecessors, (37), 18 states have return successors, (51), 19 states have call predecessors, (51), 33 states have call successors, (51) [2021-11-25 19:32:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:17,629 INFO L93 Difference]: Finished difference Result 258 states and 499 transitions. [2021-11-25 19:32:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 19:32:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 33 states have call successors, (37), 1 states have call predecessors, (37), 18 states have return successors, (51), 19 states have call predecessors, (51), 33 states have call successors, (51) Word has length 855 [2021-11-25 19:32:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:17,633 INFO L225 Difference]: With dead ends: 258 [2021-11-25 19:32:17,633 INFO L226 Difference]: Without dead ends: 163 [2021-11-25 19:32:17,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1701 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1360, Invalid=4340, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 19:32:17,637 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 392 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:17,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 209 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:32:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-25 19:32:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 126. [2021-11-25 19:32:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 87 states have internal predecessors, (93), 25 states have call successors, (25), 20 states have call predecessors, (25), 10 states have return successors, (64), 18 states have call predecessors, (64), 25 states have call successors, (64) [2021-11-25 19:32:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 182 transitions. [2021-11-25 19:32:17,657 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 182 transitions. Word has length 855 [2021-11-25 19:32:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:17,659 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 182 transitions. [2021-11-25 19:32:17,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 33 states have call successors, (37), 1 states have call predecessors, (37), 18 states have return successors, (51), 19 states have call predecessors, (51), 33 states have call successors, (51) [2021-11-25 19:32:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 182 transitions. [2021-11-25 19:32:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2021-11-25 19:32:17,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:17,666 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:17,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:17,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:17,887 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash -600231419, now seen corresponding path program 7 times [2021-11-25 19:32:17,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:17,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613425416] [2021-11-25 19:32:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:17,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 2756 proven. 10117 refuted. 0 times theorem prover too weak. 20223 trivial. 0 not checked. [2021-11-25 19:32:19,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613425416] [2021-11-25 19:32:19,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613425416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:19,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316668252] [2021-11-25 19:32:19,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:32:19,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:19,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:19,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:32:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 220 conjunts are in the unsatisfiable core [2021-11-25 19:32:19,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2021-11-25 19:32:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2021-11-25 19:33:06,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316668252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:06,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130499554] [2021-11-25 19:33:06,168 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:33:06,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:06,169 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:33:06,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:06,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 41 [2021-11-25 19:33:06,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907549927] [2021-11-25 19:33:06,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:06,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 19:33:06,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 19:33:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:33:06,175 INFO L87 Difference]: Start difference. First operand 126 states and 182 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (27), 27 states have call predecessors, (27), 9 states have call successors, (27) [2021-11-25 19:33:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:06,389 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2021-11-25 19:33:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 19:33:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (27), 27 states have call predecessors, (27), 9 states have call successors, (27) Word has length 746 [2021-11-25 19:33:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:06,391 INFO L225 Difference]: With dead ends: 127 [2021-11-25 19:33:06,392 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:33:06,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1714 GetRequests, 1672 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 19:33:06,394 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:06,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 384 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:33:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:33:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:33:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:33:06,396 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 746 [2021-11-25 19:33:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:06,396 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:33:06,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (27), 27 states have call predecessors, (27), 9 states have call successors, (27) [2021-11-25 19:33:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:33:06,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:33:06,399 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:33:06,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:06,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:33:06,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:33:07,154 INFO L858 garLoopResultBuilder]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2021-11-25 19:33:07,154 INFO L861 garLoopResultBuilder]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2021-11-25 19:33:07,154 INFO L854 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (<= fibonacci_~n |fibonacci_#in~n|) (< 1 fibonacci_~n) (<= |fibonacci_#in~n| fibonacci_~n)) [2021-11-25 19:33:07,154 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-11-25 19:33:07,155 INFO L854 garLoopResultBuilder]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse1 (= |fibonacci_#t~ret4| 1)) (.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (not (<= |fibonacci_#in~n| 2)) (and .cse0 (< 1 fibonacci_~n) .cse1)) (let ((.cse2 (<= 8 |fibonacci_#in~n|)) (.cse3 (<= |fibonacci_#in~n| fibonacci_~n))) (or (and (<= 3 fibonacci_~n) .cse0 .cse1 (<= |fibonacci_#in~n| 3)) (and .cse2 .cse0 (<= |fibonacci_#in~n| 8) (<= 13 |fibonacci_#t~ret4|) .cse3) (and (<= 5 |fibonacci_#in~n|) (<= 3 |fibonacci_#t~ret4|) .cse0 .cse3 (<= |fibonacci_#in~n| 5)) (not (<= 3 |fibonacci_#in~n|)) (and (<= 2 |fibonacci_#t~ret4|) .cse0 (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 4) .cse3) (and .cse2 (<= 21 |fibonacci_#t~ret4|) .cse0 .cse3) (and (<= 5 |fibonacci_#t~ret4|) (<= fibonacci_~n 6) (<= 6 |fibonacci_#in~n|) .cse3) (and (<= 8 |fibonacci_#t~ret4|) (<= fibonacci_~n 7) (<= 7 |fibonacci_#in~n|) .cse3))))) [2021-11-25 19:33:07,155 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 23) no Hoare annotation was computed. [2021-11-25 19:33:07,155 INFO L858 garLoopResultBuilder]: For program point L22-3(line 22) no Hoare annotation was computed. [2021-11-25 19:33:07,155 INFO L858 garLoopResultBuilder]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2021-11-25 19:33:07,155 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 23) no Hoare annotation was computed. [2021-11-25 19:33:07,155 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 37) no Hoare annotation was computed. [2021-11-25 19:33:07,156 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:33:07,156 INFO L861 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: true [2021-11-25 19:33:07,156 INFO L858 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2021-11-25 19:33:07,156 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:33:07,156 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-11-25 19:33:07,156 INFO L861 garLoopResultBuilder]: At program point L27(lines 27 38) the Hoare annotation is: true [2021-11-25 19:33:07,156 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2021-11-25 19:33:07,156 INFO L858 garLoopResultBuilder]: For program point L36(line 36) no Hoare annotation was computed. [2021-11-25 19:33:07,159 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2021-11-25 19:33:07,160 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:33:07,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:33:07 BoogieIcfgContainer [2021-11-25 19:33:07,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:33:07,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:33:07,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:33:07,167 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:33:07,167 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:31:45" (3/4) ... [2021-11-25 19:33:07,169 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:33:07,173 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2021-11-25 19:33:07,177 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-25 19:33:07,178 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-25 19:33:07,178 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 19:33:07,178 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:33:07,206 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:33:07,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:33:07,207 INFO L158 Benchmark]: Toolchain (without parser) took 82233.41ms. Allocated memory was 109.1MB in the beginning and 587.2MB in the end (delta: 478.2MB). Free memory was 70.1MB in the beginning and 304.5MB in the end (delta: -234.4MB). Peak memory consumption was 242.9MB. Max. memory is 16.1GB. [2021-11-25 19:33:07,208 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory was 86.2MB in the beginning and 86.1MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:33:07,208 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.56ms. Allocated memory is still 109.1MB. Free memory was 69.9MB in the beginning and 84.7MB in the end (delta: -14.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:33:07,208 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.08ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:33:07,209 INFO L158 Benchmark]: Boogie Preprocessor took 18.24ms. Allocated memory is still 109.1MB. Free memory was 83.4MB in the beginning and 82.4MB in the end (delta: 904.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:33:07,209 INFO L158 Benchmark]: RCFGBuilder took 294.24ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 73.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:33:07,210 INFO L158 Benchmark]: TraceAbstraction took 81593.77ms. Allocated memory was 109.1MB in the beginning and 587.2MB in the end (delta: 478.2MB). Free memory was 72.6MB in the beginning and 306.6MB in the end (delta: -234.0MB). Peak memory consumption was 245.4MB. Max. memory is 16.1GB. [2021-11-25 19:33:07,210 INFO L158 Benchmark]: Witness Printer took 40.21ms. Allocated memory is still 587.2MB. Free memory was 306.6MB in the beginning and 304.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:33:07,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory was 86.2MB in the beginning and 86.1MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.56ms. Allocated memory is still 109.1MB. Free memory was 69.9MB in the beginning and 84.7MB in the end (delta: -14.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.08ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.24ms. Allocated memory is still 109.1MB. Free memory was 83.4MB in the beginning and 82.4MB in the end (delta: 904.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 294.24ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 73.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 81593.77ms. Allocated memory was 109.1MB in the beginning and 587.2MB in the end (delta: 478.2MB). Free memory was 72.6MB in the beginning and 306.6MB in the end (delta: -234.0MB). Peak memory consumption was 245.4MB. Max. memory is 16.1GB. * Witness Printer took 40.21ms. Allocated memory is still 587.2MB. Free memory was 306.6MB in the beginning and 304.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 36]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 81.5s, OverallIterations: 10, TraceHistogramMax: 171, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1254 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1216 mSDsluCounter, 1219 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1094 mSDsCounter, 1504 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2226 IncrementalHoareTripleChecker+Invalid, 3730 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1504 mSolverCounterUnsat, 216 mSDtfsCounter, 2226 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7505 GetRequests, 7185 SyntacticMatches, 11 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=9, InterpolantAutomatonStates: 198, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 215 PreInvPairs, 315 NumberOfFragments, 134 HoareAnnotationTreeSize, 215 FomulaSimplifications, 943 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 2822 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 71.7s InterpolantComputationTime, 7067 NumberOfCodeBlocks, 6149 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 10564 ConstructedInterpolants, 0 QuantifiedInterpolants, 16132 SizeOfPredicates, 50 NumberOfNonLiveVariables, 5815 ConjunctsInSsa, 332 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 445306/502317 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 19:33:07,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14891e06-017b-4b2d-96e6-e69d68c29055/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE