./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/psyco/psyco_security.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_security.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P --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 c03d27deb00d6c25e1f99c43455f6da27475e88a721be2a7236bfffedf5da1e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:31,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:31,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:31,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:31,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:31,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:31,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:31,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:31,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:31,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:31,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:31,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:31,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:31,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:31,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:31,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:31,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:31,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:31,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:31,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:31,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:31,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:31,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:31,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:31,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:31,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:31,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:31,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:31,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:31,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:31,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:31,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:31,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:31,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:31,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:31,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:31,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:31,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:31,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:31,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:31,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:31,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:13:31,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:31,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:31,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:31,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:31,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:31,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:31,451 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:31,452 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:31,452 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:31,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:13:31,452 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:31,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:31,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:13:31,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:13:31,453 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:31,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:13:31,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:13:31,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:13:31,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:31,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:13:31,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:31,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:13:31,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:31,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:13:31,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:31,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:13:31,456 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:13:31,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:13:31,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:31,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:13:31,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:31,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:31,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:31,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:31,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:31,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:13:31,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:13:31,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:13:31,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:13:31,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:31,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:31,459 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_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c03d27deb00d6c25e1f99c43455f6da27475e88a721be2a7236bfffedf5da1e8 [2021-11-20 23:13:31,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:31,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:31,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:31,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:31,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:31,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/psyco/psyco_security.c [2021-11-20 23:13:31,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/data/0021b3be9/35ba26648f064034961558c6f77f771f/FLAGb073b8224 [2021-11-20 23:13:32,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:32,300 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/sv-benchmarks/c/psyco/psyco_security.c [2021-11-20 23:13:32,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/data/0021b3be9/35ba26648f064034961558c6f77f771f/FLAGb073b8224 [2021-11-20 23:13:32,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/data/0021b3be9/35ba26648f064034961558c6f77f771f [2021-11-20 23:13:32,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:32,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:32,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:32,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:32,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:32,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:32" (1/1) ... [2021-11-20 23:13:32,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7a15e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:32, skipping insertion in model container [2021-11-20 23:13:32,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:32" (1/1) ... [2021-11-20 23:13:32,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:32,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:33,093 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_ce88885f-e10d-4420-b50f-993aa01862c0/sv-benchmarks/c/psyco/psyco_security.c[12744,12757] [2021-11-20 23:13:33,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:33,105 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:33,148 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_ce88885f-e10d-4420-b50f-993aa01862c0/sv-benchmarks/c/psyco/psyco_security.c[12744,12757] [2021-11-20 23:13:33,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:33,162 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:33,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33 WrapperNode [2021-11-20 23:13:33,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:33,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:33,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:33,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:33,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,219 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 269 [2021-11-20 23:13:33,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:33,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:33,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:33,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:33,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:33,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:33,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:33,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:33,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (1/1) ... [2021-11-20 23:13:33,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:33,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:33,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:33,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:33,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:33,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:13:33,397 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:33,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:33,783 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:33,811 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:33,811 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-20 23:13:33,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:33 BoogieIcfgContainer [2021-11-20 23:13:33,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:33,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:33,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:33,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:33,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:32" (1/3) ... [2021-11-20 23:13:33,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb507c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:33, skipping insertion in model container [2021-11-20 23:13:33,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:33" (2/3) ... [2021-11-20 23:13:33,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb507c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:33, skipping insertion in model container [2021-11-20 23:13:33,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:33" (3/3) ... [2021-11-20 23:13:33,829 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2021-11-20 23:13:33,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:33,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:13:33,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:33,894 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 [2021-11-20 23:13:33,899 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:13:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 75 states have internal predecessors, (145), 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) [2021-11-20 23:13:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:13:33,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:33,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:33,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 269823665, now seen corresponding path program 1 times [2021-11-20 23:13:33,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:33,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606199959] [2021-11-20 23:13:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:33,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:34,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:34,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606199959] [2021-11-20 23:13:34,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606199959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:34,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:34,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:13:34,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080097777] [2021-11-20 23:13:34,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:13:34,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:13:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:13:34,169 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 75 states have internal predecessors, (145), 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-20 23:13:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:34,200 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-11-20 23:13:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:13:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) Word has length 8 [2021-11-20 23:13:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:34,212 INFO L225 Difference]: With dead ends: 151 [2021-11-20 23:13:34,212 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 23:13:34,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:13:34,219 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:34,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 23:13:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-20 23:13:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.5) internal successors, (108), 72 states have internal predecessors, (108), 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) [2021-11-20 23:13:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 108 transitions. [2021-11-20 23:13:34,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 108 transitions. Word has length 8 [2021-11-20 23:13:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:34,259 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 108 transitions. [2021-11-20 23:13:34,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-20 23:13:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 108 transitions. [2021-11-20 23:13:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:13:34,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:34,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:34,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:13:34,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash 307090919, now seen corresponding path program 1 times [2021-11-20 23:13:34,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:34,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969570783] [2021-11-20 23:13:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:34,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:34,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969570783] [2021-11-20 23:13:34,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969570783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:34,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:34,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:13:34,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010030844] [2021-11-20 23:13:34,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:34,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:34,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:34,309 INFO L87 Difference]: Start difference. First operand 73 states and 108 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 23:13:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:34,404 INFO L93 Difference]: Finished difference Result 148 states and 219 transitions. [2021-11-20 23:13:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) Word has length 9 [2021-11-20 23:13:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:34,406 INFO L225 Difference]: With dead ends: 148 [2021-11-20 23:13:34,406 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 23:13:34,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:34,409 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:34,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 187 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 23:13:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-20 23:13:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.48) internal successors, (111), 75 states have internal predecessors, (111), 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) [2021-11-20 23:13:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 111 transitions. [2021-11-20 23:13:34,431 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 111 transitions. Word has length 9 [2021-11-20 23:13:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:34,431 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 111 transitions. [2021-11-20 23:13:34,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 23:13:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 111 transitions. [2021-11-20 23:13:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:13:34,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:34,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:34,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:13:34,433 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:34,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1213654828, now seen corresponding path program 1 times [2021-11-20 23:13:34,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:34,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117892285] [2021-11-20 23:13:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:34,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:34,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117892285] [2021-11-20 23:13:34,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117892285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:34,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:34,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:34,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668081361] [2021-11-20 23:13:34,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:34,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:34,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:34,494 INFO L87 Difference]: Start difference. First operand 76 states and 111 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-20 23:13:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:34,546 INFO L93 Difference]: Finished difference Result 156 states and 228 transitions. [2021-11-20 23:13:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) Word has length 14 [2021-11-20 23:13:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:34,548 INFO L225 Difference]: With dead ends: 156 [2021-11-20 23:13:34,548 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 23:13:34,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:34,550 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:34,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 171 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 23:13:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-20 23:13:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 79 states have internal predecessors, (115), 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) [2021-11-20 23:13:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 115 transitions. [2021-11-20 23:13:34,567 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 115 transitions. Word has length 14 [2021-11-20 23:13:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:34,568 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 115 transitions. [2021-11-20 23:13:34,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-20 23:13:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 115 transitions. [2021-11-20 23:13:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:13:34,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:34,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:34,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:13:34,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:34,573 INFO L85 PathProgramCache]: Analyzing trace with hash -107735230, now seen corresponding path program 1 times [2021-11-20 23:13:34,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:34,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832728539] [2021-11-20 23:13:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:34,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:34,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832728539] [2021-11-20 23:13:34,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832728539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:34,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:34,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220547768] [2021-11-20 23:13:34,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:34,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:34,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:34,685 INFO L87 Difference]: Start difference. First operand 80 states and 115 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-11-20 23:13:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:34,910 INFO L93 Difference]: Finished difference Result 253 states and 361 transitions. [2021-11-20 23:13:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) Word has length 17 [2021-11-20 23:13:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:34,916 INFO L225 Difference]: With dead ends: 253 [2021-11-20 23:13:34,917 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 23:13:34,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:34,926 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 104 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:34,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 287 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:13:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 23:13:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 128. [2021-11-20 23:13:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.5196850393700787) internal successors, (193), 127 states have internal predecessors, (193), 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) [2021-11-20 23:13:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 193 transitions. [2021-11-20 23:13:34,940 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 193 transitions. Word has length 17 [2021-11-20 23:13:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:34,940 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 193 transitions. [2021-11-20 23:13:34,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-11-20 23:13:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 193 transitions. [2021-11-20 23:13:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:13:34,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:34,942 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:34,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:13:34,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1275599573, now seen corresponding path program 1 times [2021-11-20 23:13:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356862757] [2021-11-20 23:13:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:34,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:13:34,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:34,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356862757] [2021-11-20 23:13:34,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356862757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:34,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:34,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:34,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108850759] [2021-11-20 23:13:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:34,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:34,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:34,997 INFO L87 Difference]: Start difference. First operand 128 states and 193 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-11-20 23:13:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:35,040 INFO L93 Difference]: Finished difference Result 232 states and 347 transitions. [2021-11-20 23:13:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) Word has length 21 [2021-11-20 23:13:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:35,043 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:13:35,043 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 23:13:35,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,051 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:35,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 149 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 23:13:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-20 23:13:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.4271844660194175) internal successors, (147), 103 states have internal predecessors, (147), 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) [2021-11-20 23:13:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 147 transitions. [2021-11-20 23:13:35,072 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 147 transitions. Word has length 21 [2021-11-20 23:13:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:35,073 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 147 transitions. [2021-11-20 23:13:35,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-11-20 23:13:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 147 transitions. [2021-11-20 23:13:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 23:13:35,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:35,074 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:35,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:13:35,081 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash 862669249, now seen corresponding path program 1 times [2021-11-20 23:13:35,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748465245] [2021-11-20 23:13:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:35,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:13:35,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748465245] [2021-11-20 23:13:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748465245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:35,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:35,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:35,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097670400] [2021-11-20 23:13:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:35,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:35,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,164 INFO L87 Difference]: Start difference. First operand 104 states and 147 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-11-20 23:13:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:35,202 INFO L93 Difference]: Finished difference Result 188 states and 267 transitions. [2021-11-20 23:13:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) Word has length 23 [2021-11-20 23:13:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:35,204 INFO L225 Difference]: With dead ends: 188 [2021-11-20 23:13:35,204 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 23:13:35,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,207 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 28 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:35,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 23:13:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-20 23:13:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 83 states have internal predecessors, (117), 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) [2021-11-20 23:13:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2021-11-20 23:13:35,231 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 23 [2021-11-20 23:13:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:35,231 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2021-11-20 23:13:35,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-11-20 23:13:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2021-11-20 23:13:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:13:35,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:35,233 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:35,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:13:35,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -922672237, now seen corresponding path program 1 times [2021-11-20 23:13:35,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:35,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055808926] [2021-11-20 23:13:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:35,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:13:35,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:35,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055808926] [2021-11-20 23:13:35,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055808926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:35,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:35,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:35,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324622617] [2021-11-20 23:13:35,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:35,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:35,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,302 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-11-20 23:13:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:35,332 INFO L93 Difference]: Finished difference Result 131 states and 184 transitions. [2021-11-20 23:13:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) Word has length 25 [2021-11-20 23:13:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:35,333 INFO L225 Difference]: With dead ends: 131 [2021-11-20 23:13:35,333 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 23:13:35,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,335 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:35,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 23:13:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-20 23:13:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 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) [2021-11-20 23:13:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-11-20 23:13:35,340 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 25 [2021-11-20 23:13:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:35,341 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-11-20 23:13:35,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-11-20 23:13:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-11-20 23:13:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 23:13:35,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:35,342 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:35,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:13:35,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash -429138385, now seen corresponding path program 1 times [2021-11-20 23:13:35,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677218203] [2021-11-20 23:13:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:35,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:13:35,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:35,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677218203] [2021-11-20 23:13:35,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677218203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:35,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:35,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:35,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232615863] [2021-11-20 23:13:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:35,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:35,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:35,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,383 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-11-20 23:13:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:35,409 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2021-11-20 23:13:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) Word has length 28 [2021-11-20 23:13:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:35,412 INFO L225 Difference]: With dead ends: 106 [2021-11-20 23:13:35,412 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 23:13:35,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:35,413 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:35,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 101 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 23:13:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 23:13:35,414 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) [2021-11-20 23:13:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 23:13:35,414 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-20 23:13:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:35,415 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 23:13:35,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-11-20 23:13:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 23:13:35,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 23:13:35,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:13:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:13:35,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 23:13:35,473 INFO L858 garLoopResultBuilder]: For program point L250(lines 250 265) no Hoare annotation was computed. [2021-11-20 23:13:35,474 INFO L858 garLoopResultBuilder]: For program point L118(lines 118 133) no Hoare annotation was computed. [2021-11-20 23:13:35,474 INFO L858 garLoopResultBuilder]: For program point L52(lines 52 63) no Hoare annotation was computed. [2021-11-20 23:13:35,474 INFO L858 garLoopResultBuilder]: For program point L366(lines 366 381) no Hoare annotation was computed. [2021-11-20 23:13:35,474 INFO L858 garLoopResultBuilder]: For program point L234(lines 234 249) no Hoare annotation was computed. [2021-11-20 23:13:35,475 INFO L858 garLoopResultBuilder]: For program point L168(lines 168 179) no Hoare annotation was computed. [2021-11-20 23:13:35,475 INFO L858 garLoopResultBuilder]: For program point L102(lines 102 117) no Hoare annotation was computed. [2021-11-20 23:13:35,475 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-11-20 23:13:35,476 INFO L854 garLoopResultBuilder]: At program point L383(lines 24 387) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~this_state~0#1| 3) (<= 4 |ULTIMATE.start_main_~q~0#1|)) (and (= 2 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~this_state~0#1| 0)) (= |ULTIMATE.start_main_~q~0#1| 0) (and (= 3 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~this_state~0#1| 2))) [2021-11-20 23:13:35,477 INFO L858 garLoopResultBuilder]: For program point L350(lines 350 365) no Hoare annotation was computed. [2021-11-20 23:13:35,477 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 23:13:35,477 INFO L858 garLoopResultBuilder]: For program point L218(lines 218 233) no Hoare annotation was computed. [2021-11-20 23:13:35,477 INFO L858 garLoopResultBuilder]: For program point L185(lines 185 284) no Hoare annotation was computed. [2021-11-20 23:13:35,478 INFO L858 garLoopResultBuilder]: For program point L152(lines 152 163) no Hoare annotation was computed. [2021-11-20 23:13:35,478 INFO L858 garLoopResultBuilder]: For program point L334(lines 334 349) no Hoare annotation was computed. [2021-11-20 23:13:35,478 INFO L858 garLoopResultBuilder]: For program point L268(lines 268 279) no Hoare annotation was computed. [2021-11-20 23:13:35,478 INFO L858 garLoopResultBuilder]: For program point L202(lines 202 217) no Hoare annotation was computed. [2021-11-20 23:13:35,478 INFO L858 garLoopResultBuilder]: For program point L136(lines 136 147) no Hoare annotation was computed. [2021-11-20 23:13:35,478 INFO L858 garLoopResultBuilder]: For program point L318(lines 318 333) no Hoare annotation was computed. [2021-11-20 23:13:35,479 INFO L858 garLoopResultBuilder]: For program point L285(lines 285 384) no Hoare annotation was computed. [2021-11-20 23:13:35,479 INFO L858 garLoopResultBuilder]: For program point L252(lines 252 263) no Hoare annotation was computed. [2021-11-20 23:13:35,479 INFO L858 garLoopResultBuilder]: For program point L186(lines 186 201) no Hoare annotation was computed. [2021-11-20 23:13:35,479 INFO L858 garLoopResultBuilder]: For program point L120(lines 120 131) no Hoare annotation was computed. [2021-11-20 23:13:35,479 INFO L858 garLoopResultBuilder]: For program point L368(lines 368 379) no Hoare annotation was computed. [2021-11-20 23:13:35,479 INFO L858 garLoopResultBuilder]: For program point L302(lines 302 317) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L236(lines 236 247) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L104(lines 104 115) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L352(lines 352 363) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L286(lines 286 301) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L220(lines 220 231) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L88(lines 88 90) no Hoare annotation was computed. [2021-11-20 23:13:35,480 INFO L858 garLoopResultBuilder]: For program point L336(lines 336 347) no Hoare annotation was computed. [2021-11-20 23:13:35,481 INFO L858 garLoopResultBuilder]: For program point L204(lines 204 215) no Hoare annotation was computed. [2021-11-20 23:13:35,481 INFO L858 garLoopResultBuilder]: For program point L72(lines 72 74) no Hoare annotation was computed. [2021-11-20 23:13:35,481 INFO L858 garLoopResultBuilder]: For program point L320(lines 320 331) no Hoare annotation was computed. [2021-11-20 23:13:35,481 INFO L858 garLoopResultBuilder]: For program point L188(lines 188 199) no Hoare annotation was computed. [2021-11-20 23:13:35,481 INFO L858 garLoopResultBuilder]: For program point L56(lines 56 58) no Hoare annotation was computed. [2021-11-20 23:13:35,482 INFO L858 garLoopResultBuilder]: For program point L304(lines 304 315) no Hoare annotation was computed. [2021-11-20 23:13:35,482 INFO L858 garLoopResultBuilder]: For program point L172(lines 172 174) no Hoare annotation was computed. [2021-11-20 23:13:35,482 INFO L858 garLoopResultBuilder]: For program point L288(lines 288 299) no Hoare annotation was computed. [2021-11-20 23:13:35,482 INFO L858 garLoopResultBuilder]: For program point L156(lines 156 158) no Hoare annotation was computed. [2021-11-20 23:13:35,483 INFO L854 garLoopResultBuilder]: At program point L24-2(lines 24 387) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~this_state~0#1| 3) (<= 4 |ULTIMATE.start_main_~q~0#1|)) (and (= |ULTIMATE.start_main_~q~0#1| 0) (not (= |ULTIMATE.start_main_~this_state~0#1| 2)))) [2021-11-20 23:13:35,483 INFO L858 garLoopResultBuilder]: For program point L24-3(lines 24 387) no Hoare annotation was computed. [2021-11-20 23:13:35,483 INFO L858 garLoopResultBuilder]: For program point L272(lines 272 274) no Hoare annotation was computed. [2021-11-20 23:13:35,483 INFO L858 garLoopResultBuilder]: For program point L140(lines 140 142) no Hoare annotation was computed. [2021-11-20 23:13:35,483 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 23:13:35,483 INFO L858 garLoopResultBuilder]: For program point L256(lines 256 258) no Hoare annotation was computed. [2021-11-20 23:13:35,483 INFO L858 garLoopResultBuilder]: For program point L124(lines 124 126) no Hoare annotation was computed. [2021-11-20 23:13:35,484 INFO L858 garLoopResultBuilder]: For program point L372(lines 372 374) no Hoare annotation was computed. [2021-11-20 23:13:35,484 INFO L858 garLoopResultBuilder]: For program point L240(lines 240 242) no Hoare annotation was computed. [2021-11-20 23:13:35,484 INFO L858 garLoopResultBuilder]: For program point L108(lines 108 110) no Hoare annotation was computed. [2021-11-20 23:13:35,485 INFO L858 garLoopResultBuilder]: For program point L356(lines 356 358) no Hoare annotation was computed. [2021-11-20 23:13:35,485 INFO L858 garLoopResultBuilder]: For program point L224(lines 224 226) no Hoare annotation was computed. [2021-11-20 23:13:35,485 INFO L854 garLoopResultBuilder]: At program point L373(lines 15 392) the Hoare annotation is: false [2021-11-20 23:13:35,485 INFO L858 garLoopResultBuilder]: For program point L340(lines 340 342) no Hoare annotation was computed. [2021-11-20 23:13:35,485 INFO L858 garLoopResultBuilder]: For program point L208(lines 208 210) no Hoare annotation was computed. [2021-11-20 23:13:35,486 INFO L858 garLoopResultBuilder]: For program point L324(lines 324 326) no Hoare annotation was computed. [2021-11-20 23:13:35,486 INFO L858 garLoopResultBuilder]: For program point L192(lines 192 194) no Hoare annotation was computed. [2021-11-20 23:13:35,486 INFO L858 garLoopResultBuilder]: For program point L308(lines 308 310) no Hoare annotation was computed. [2021-11-20 23:13:35,486 INFO L858 garLoopResultBuilder]: For program point L292(lines 292 294) no Hoare annotation was computed. [2021-11-20 23:13:35,486 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 48) no Hoare annotation was computed. [2021-11-20 23:13:35,487 INFO L858 garLoopResultBuilder]: For program point L30(lines 30 45) no Hoare annotation was computed. [2021-11-20 23:13:35,488 INFO L861 garLoopResultBuilder]: At program point L15(lines 15 392) the Hoare annotation is: true [2021-11-20 23:13:35,488 INFO L858 garLoopResultBuilder]: For program point L32(lines 32 43) no Hoare annotation was computed. [2021-11-20 23:13:35,488 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 391) no Hoare annotation was computed. [2021-11-20 23:13:35,488 INFO L858 garLoopResultBuilder]: For program point L82(lines 82 97) no Hoare annotation was computed. [2021-11-20 23:13:35,488 INFO L858 garLoopResultBuilder]: For program point L49(lines 49 100) no Hoare annotation was computed. [2021-11-20 23:13:35,488 INFO L858 garLoopResultBuilder]: For program point L66(lines 66 81) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L50(lines 50 65) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L166(lines 166 181) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L150(lines 150 165) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L84(lines 84 95) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L266(lines 266 281) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L134(lines 134 149) no Hoare annotation was computed. [2021-11-20 23:13:35,489 INFO L858 garLoopResultBuilder]: For program point L101(lines 101 184) no Hoare annotation was computed. [2021-11-20 23:13:35,490 INFO L858 garLoopResultBuilder]: For program point L68(lines 68 79) no Hoare annotation was computed. [2021-11-20 23:13:35,493 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:35,495 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:13:35,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:13:35 BoogieIcfgContainer [2021-11-20 23:13:35,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:13:35,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:13:35,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:13:35,518 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:13:35,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:33" (3/4) ... [2021-11-20 23:13:35,523 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 23:13:35,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-20 23:13:35,547 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 23:13:35,547 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-20 23:13:35,547 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 23:13:35,577 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:13:35,577 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:13:35,578 INFO L158 Benchmark]: Toolchain (without parser) took 2789.19ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 57.8MB in the beginning and 63.6MB in the end (delta: -5.8MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2021-11-20 23:13:35,578 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:35,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.34ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 57.5MB in the beginning and 101.9MB in the end (delta: -44.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:13:35,579 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.87ms. Allocated memory is still 130.0MB. Free memory was 101.9MB in the beginning and 99.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:13:35,580 INFO L158 Benchmark]: Boogie Preprocessor took 29.53ms. Allocated memory is still 130.0MB. Free memory was 99.8MB in the beginning and 98.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:35,580 INFO L158 Benchmark]: RCFGBuilder took 569.03ms. Allocated memory is still 130.0MB. Free memory was 98.4MB in the beginning and 83.0MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-20 23:13:35,581 INFO L158 Benchmark]: TraceAbstraction took 1695.37ms. Allocated memory is still 130.0MB. Free memory was 82.3MB in the beginning and 66.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2021-11-20 23:13:35,581 INFO L158 Benchmark]: Witness Printer took 60.12ms. Allocated memory is still 130.0MB. Free memory was 66.0MB in the beginning and 63.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:13:35,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.34ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 57.5MB in the beginning and 101.9MB in the end (delta: -44.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.87ms. Allocated memory is still 130.0MB. Free memory was 101.9MB in the beginning and 99.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.53ms. Allocated memory is still 130.0MB. Free memory was 99.8MB in the beginning and 98.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 569.03ms. Allocated memory is still 130.0MB. Free memory was 98.4MB in the beginning and 83.0MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1695.37ms. Allocated memory is still 130.0MB. Free memory was 82.3MB in the beginning and 66.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. * Witness Printer took 60.12ms. Allocated memory is still 130.0MB. Free memory was 66.0MB in the beginning and 63.6MB in the end (delta: 2.5MB). 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: 391]: 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 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 212 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 212 mSDsluCounter, 1243 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 442 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 225 IncrementalHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 801 mSDtfsCounter, 225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=4, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 11 NumberOfFragments, 43 HoareAnnotationTreeSize, 4 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 145 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 34/34 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: 24]: Loop Invariant Derived loop invariant: (((this_state == 3 && 4 <= q) || (2 == q && this_state == 0)) || q == 0) || (3 == q && this_state == 2) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (this_state == 3 && 4 <= q) || (q == 0 && !(this_state == 2)) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-11-20 23:13:35,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce88885f-e10d-4420-b50f-993aa01862c0/bin/utaipan-TEXQjIfE4P/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