./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:10:26,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:10:26,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:10:26,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:10:26,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:10:26,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:10:26,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:10:26,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:10:26,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:10:26,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:10:26,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:10:26,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:10:26,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:10:26,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:10:26,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:10:26,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:10:26,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:10:26,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:10:26,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:10:26,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:10:26,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:10:26,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:10:26,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:10:26,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:10:26,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:10:26,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:10:26,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:10:26,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:10:26,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:10:26,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:10:26,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:10:26,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:10:26,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:10:26,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:10:26,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:10:26,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:10:26,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:10:26,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:10:26,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:10:26,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:10:26,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:10:26,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:10:26,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:10:26,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:10:26,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:10:26,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:10:26,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:10:26,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:10:26,436 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:10:26,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:10:26,436 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:10:26,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:10:26,437 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:10:26,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:10:26,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:10:26,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:10:26,438 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:10:26,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:10:26,439 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:10:26,439 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:10:26,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:10:26,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:10:26,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:10:26,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:10:26,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:10:26,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:10:26,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:10:26,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:10:26,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:10:26,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:10:26,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:10:26,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:10:26,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:10:26,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:10:26,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:10:26,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:10:26,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:10:26,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:10:26,445 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:10:26,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:10:26,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:10:26,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:10:26,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:10:26,446 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_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 [2021-11-25 19:10:26,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:10:26,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:10:26,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:10:26,729 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:10:26,730 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:10:26,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-11-25 19:10:26,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/data/d4c04709b/e55aee85245d4b83b988e9a056bb22b9/FLAG38e2ef756 [2021-11-25 19:10:27,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:10:27,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-11-25 19:10:27,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/data/d4c04709b/e55aee85245d4b83b988e9a056bb22b9/FLAG38e2ef756 [2021-11-25 19:10:27,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/data/d4c04709b/e55aee85245d4b83b988e9a056bb22b9 [2021-11-25 19:10:27,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:10:27,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:10:27,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:10:27,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:10:27,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:10:27,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8ad6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27, skipping insertion in model container [2021-11-25 19:10:27,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:10:27,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:10:27,848 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_a46f0805-04cf-49c3-9e60-8f92256ee8e2/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2021-11-25 19:10:27,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:10:27,869 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:10:27,891 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_a46f0805-04cf-49c3-9e60-8f92256ee8e2/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2021-11-25 19:10:27,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:10:27,913 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:10:27,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27 WrapperNode [2021-11-25 19:10:27,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:10:27,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:10:27,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:10:27,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:10:27,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,957 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-25 19:10:27,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:10:27,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:10:27,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:10:27,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:10:27,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:27,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:10:28,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:10:28,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:10:28,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:10:28,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (1/1) ... [2021-11-25 19:10:28,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:10:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:28,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:10:28,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:10:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:10:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:10:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:10:28,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:10:28,151 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:10:28,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:10:28,244 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:10:28,256 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:10:28,256 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:10:28,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:10:28 BoogieIcfgContainer [2021-11-25 19:10:28,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:10:28,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:10:28,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:10:28,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:10:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:10:27" (1/3) ... [2021-11-25 19:10:28,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:10:28, skipping insertion in model container [2021-11-25 19:10:28,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:10:27" (2/3) ... [2021-11-25 19:10:28,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:10:28, skipping insertion in model container [2021-11-25 19:10:28,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:10:28" (3/3) ... [2021-11-25 19:10:28,280 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2021-11-25 19:10:28,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:10:28,285 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:10:28,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:10:28,365 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:10:28,365 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:10:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:10:28,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:28,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:28,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1248656439, now seen corresponding path program 1 times [2021-11-25 19:10:28,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:28,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84169606] [2021-11-25 19:10:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:28,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:28,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:28,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84169606] [2021-11-25 19:10:28,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84169606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:28,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:28,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:10:28,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105800705] [2021-11-25 19:10:28,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:28,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:10:28,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:10:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:10:28,585 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:28,605 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2021-11-25 19:10:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:10:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-25 19:10:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:28,616 INFO L225 Difference]: With dead ends: 23 [2021-11-25 19:10:28,616 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 19:10:28,619 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 [2021-11-25 19:10:28,624 INFO L933 BasicCegarLoop]: 14 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, 14 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 [2021-11-25 19:10:28,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:10:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 19:10:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 19:10:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 19:10:28,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-25 19:10:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:28,656 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 19:10:28,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 19:10:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:10:28,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:28,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:28,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:10:28,659 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1788682382, now seen corresponding path program 1 times [2021-11-25 19:10:28,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050557456] [2021-11-25 19:10:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:28,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:28,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050557456] [2021-11-25 19:10:28,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050557456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:28,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:28,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:10:28,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838704422] [2021-11-25 19:10:28,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:28,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:28,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:28,751 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-11-25 19:10:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:28,812 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-25 19:10:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2021-11-25 19:10:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:28,819 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:10:28,819 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:10:28,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:10:28,821 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:28,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:10:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:10:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-11-25 19:10:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 19:10:28,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2021-11-25 19:10:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:28,827 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 19:10:28,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-11-25 19:10:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 19:10:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:10:28,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:28,829 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:28,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:10:28,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 981712553, now seen corresponding path program 1 times [2021-11-25 19:10:28,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:28,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471428363] [2021-11-25 19:10:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:28,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:28,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471428363] [2021-11-25 19:10:28,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471428363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804116835] [2021-11-25 19:10:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:28,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:28,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:28,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:10:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:10:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:29,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804116835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448789051] [2021-11-25 19:10:29,142 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:29,142 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:29,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:29,152 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:29,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:29,478 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:29,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '161#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:10:29,804 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:29,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-25 19:10:29,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057452665] [2021-11-25 19:10:29,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:29,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:10:29,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:10:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:10:29,807 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:29,924 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-25 19:10:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:10:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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 11 [2021-11-25 19:10:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:29,926 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:10:29,926 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 19:10:29,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:10:29,934 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:29,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:10:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 19:10:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-11-25 19:10:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-11-25 19:10:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-25 19:10:29,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-11-25 19:10:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:29,945 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-25 19:10:29,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-25 19:10:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:10:29,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:29,947 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:29,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 19:10:30,175 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1147123834, now seen corresponding path program 2 times [2021-11-25 19:10:30,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:30,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609876768] [2021-11-25 19:10:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:30,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:30,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609876768] [2021-11-25 19:10:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609876768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653638098] [2021-11-25 19:10:30,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:10:30,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:30,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:30,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:30,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:10:30,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:10:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:10:30,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:10:30,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:30,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:30,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653638098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:30,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333529592] [2021-11-25 19:10:30,525 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:30,525 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:30,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:30,526 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:30,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:30,737 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:31,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:10:31,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:31,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:31,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-25 19:10:31,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709482566] [2021-11-25 19:10:31,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:31,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:10:31,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:10:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:10:31,013 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:31,177 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-11-25 19:10:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:10:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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 [2021-11-25 19:10:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:31,181 INFO L225 Difference]: With dead ends: 86 [2021-11-25 19:10:31,181 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 19:10:31,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:10:31,183 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:31,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 37 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:10:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 19:10:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-11-25 19:10:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-25 19:10:31,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 17 [2021-11-25 19:10:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:31,191 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-25 19:10:31,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-25 19:10:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:10:31,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:31,193 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:31,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:31,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:31,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1590027812, now seen corresponding path program 3 times [2021-11-25 19:10:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:31,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028051531] [2021-11-25 19:10:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:31,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:31,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028051531] [2021-11-25 19:10:31,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028051531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269357043] [2021-11-25 19:10:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:10:31,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:31,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:31,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:10:31,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:10:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:10:31,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:10:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:31,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269357043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914098448] [2021-11-25 19:10:32,036 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:32,036 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:32,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:32,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:32,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:32,199 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:32,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '696#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:10:32,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:32,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:32,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-11-25 19:10:32,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455581910] [2021-11-25 19:10:32,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:10:32,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:10:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:10:32,467 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:32,924 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2021-11-25 19:10:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-25 19:10:32,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 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 29 [2021-11-25 19:10:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:32,926 INFO L225 Difference]: With dead ends: 206 [2021-11-25 19:10:32,926 INFO L226 Difference]: Without dead ends: 180 [2021-11-25 19:10:32,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:10:32,929 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 330 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:32,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 57 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:10:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-25 19:10:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 87. [2021-11-25 19:10:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 86 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-11-25 19:10:32,940 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 29 [2021-11-25 19:10:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:32,940 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-11-25 19:10:32,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-11-25 19:10:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 19:10:32,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:32,943 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:32,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:33,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1362645920, now seen corresponding path program 4 times [2021-11-25 19:10:33,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879798900] [2021-11-25 19:10:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:33,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:33,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:33,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879798900] [2021-11-25 19:10:33,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879798900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:33,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044671077] [2021-11-25 19:10:33,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:10:33,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:33,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:33,538 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:33,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:10:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:10:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:33,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:34,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044671077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:34,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478820850] [2021-11-25 19:10:34,646 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:34,647 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:34,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:34,647 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:34,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:34,779 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:35,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1383#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:10:35,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:35,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:35,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-25 19:10:35,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256297061] [2021-11-25 19:10:35,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:35,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 19:10:35,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 19:10:35,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=2011, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 19:10:35,071 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:36,166 INFO L93 Difference]: Finished difference Result 554 states and 624 transitions. [2021-11-25 19:10:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-25 19:10:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 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 53 [2021-11-25 19:10:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:36,177 INFO L225 Difference]: With dead ends: 554 [2021-11-25 19:10:36,177 INFO L226 Difference]: Without dead ends: 504 [2021-11-25 19:10:36,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1967, Invalid=4675, Unknown=0, NotChecked=0, Total=6642 [2021-11-25 19:10:36,187 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 482 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:36,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 111 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:10:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-25 19:10:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 171. [2021-11-25 19:10:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1470588235294117) internal successors, (195), 170 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2021-11-25 19:10:36,214 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 53 [2021-11-25 19:10:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:36,215 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2021-11-25 19:10:36,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2021-11-25 19:10:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 19:10:36,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:36,219 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:36,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:36,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:36,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash 569942824, now seen corresponding path program 5 times [2021-11-25 19:10:36,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094467238] [2021-11-25 19:10:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:36,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:37,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:37,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094467238] [2021-11-25 19:10:37,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094467238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:37,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704131935] [2021-11-25 19:10:37,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:10:37,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:37,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:37,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:37,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:10:37,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:10:37,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:10:37,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 19:10:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:38,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704131935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169636143] [2021-11-25 19:10:40,744 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:40,744 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:40,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:40,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:40,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:40,905 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:41,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:10:41,229 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:41,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:41,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2021-11-25 19:10:41,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043674317] [2021-11-25 19:10:41,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:41,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-25 19:10:41,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-25 19:10:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4871, Invalid=6259, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 19:10:41,237 INFO L87 Difference]: Start difference. First operand 171 states and 195 transitions. Second operand has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:44,618 INFO L93 Difference]: Finished difference Result 1682 states and 1824 transitions. [2021-11-25 19:10:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-11-25 19:10:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 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 101 [2021-11-25 19:10:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:44,628 INFO L225 Difference]: With dead ends: 1682 [2021-11-25 19:10:44,628 INFO L226 Difference]: Without dead ends: 1584 [2021-11-25 19:10:44,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7367, Invalid=16195, Unknown=0, NotChecked=0, Total=23562 [2021-11-25 19:10:44,638 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1376 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:44,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 210 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:10:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-25 19:10:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 339. [2021-11-25 19:10:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.1449704142011834) internal successors, (387), 338 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 387 transitions. [2021-11-25 19:10:44,677 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 387 transitions. Word has length 101 [2021-11-25 19:10:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:44,678 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 387 transitions. [2021-11-25 19:10:44,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 387 transitions. [2021-11-25 19:10:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-25 19:10:44,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:44,684 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:44,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:44,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:10:44,895 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1568191032, now seen corresponding path program 6 times [2021-11-25 19:10:44,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268176186] [2021-11-25 19:10:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:44,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:48,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:48,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268176186] [2021-11-25 19:10:48,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268176186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:48,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304707570] [2021-11-25 19:10:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:10:48,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:48,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:48,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:10:48,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:10:48,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:10:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-25 19:10:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:48,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:58,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304707570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:58,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017051053] [2021-11-25 19:10:58,155 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:58,155 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:58,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:58,156 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:58,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:58,282 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:58,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6357#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:10:58,725 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:58,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:58,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 194 [2021-11-25 19:10:58,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860155487] [2021-11-25 19:10:58,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:58,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2021-11-25 19:10:58,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2021-11-25 19:10:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18935, Invalid=21667, Unknown=0, NotChecked=0, Total=40602 [2021-11-25 19:10:58,737 INFO L87 Difference]: Start difference. First operand 339 states and 387 transitions. Second operand has 195 states, 195 states have (on average 2.051282051282051) internal successors, (400), 194 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:20,298 INFO L93 Difference]: Finished difference Result 5666 states and 5952 transitions. [2021-11-25 19:11:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2021-11-25 19:11:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.051282051282051) internal successors, (400), 194 states have internal predecessors, (400), 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 197 [2021-11-25 19:11:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:20,325 INFO L225 Difference]: With dead ends: 5666 [2021-11-25 19:11:20,326 INFO L226 Difference]: Without dead ends: 5472 [2021-11-25 19:11:20,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12273 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=28535, Invalid=59971, Unknown=0, NotChecked=0, Total=88506 [2021-11-25 19:11:20,338 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2830 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 1463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1463 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:20,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 403 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1463 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:11:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-11-25 19:11:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 675. [2021-11-25 19:11:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.1439169139465875) internal successors, (771), 674 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 771 transitions. [2021-11-25 19:11:20,387 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 771 transitions. Word has length 197 [2021-11-25 19:11:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:20,388 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 771 transitions. [2021-11-25 19:11:20,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.051282051282051) internal successors, (400), 194 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 771 transitions. [2021-11-25 19:11:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-25 19:11:20,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:20,398 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:20,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:20,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:11:20,620 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1812557736, now seen corresponding path program 7 times [2021-11-25 19:11:20,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:20,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228855213] [2021-11-25 19:11:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:20,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:33,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228855213] [2021-11-25 19:11:33,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228855213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526206992] [2021-11-25 19:11:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:11:33,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:33,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:33,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:11:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 19:11:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:57,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:57,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526206992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:57,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:11:57,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [193] total 385 [2021-11-25 19:11:57,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105045395] [2021-11-25 19:11:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:57,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-25 19:11:57,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-25 19:11:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2021-11-25 19:11:57,440 INFO L87 Difference]: Start difference. First operand 675 states and 771 transitions. Second operand has 193 states, 193 states have (on average 2.0155440414507773) internal successors, (389), 193 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:01,195 INFO L93 Difference]: Finished difference Result 27955 states and 28141 transitions. [2021-11-25 19:12:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-25 19:12:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0155440414507773) internal successors, (389), 193 states have internal predecessors, (389), 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 389 [2021-11-25 19:12:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:01,202 INFO L225 Difference]: With dead ends: 27955 [2021-11-25 19:12:01,202 INFO L226 Difference]: Without dead ends: 1198 [2021-11-25 19:12:01,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36480 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2021-11-25 19:12:01,235 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 778 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:01,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1159 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:12:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-25 19:12:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1182. [2021-11-25 19:12:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 1.0076206604572395) internal successors, (1190), 1181 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1190 transitions. [2021-11-25 19:12:01,264 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1190 transitions. Word has length 389 [2021-11-25 19:12:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:01,265 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1190 transitions. [2021-11-25 19:12:01,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0155440414507773) internal successors, (389), 193 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1190 transitions. [2021-11-25 19:12:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-25 19:12:01,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:01,274 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:01,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:01,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:01,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 502894182, now seen corresponding path program 1 times [2021-11-25 19:12:01,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:12:01,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730159735] [2021-11-25 19:12:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:01,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:12:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:13,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:12:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730159735] [2021-11-25 19:12:13,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730159735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323766388] [2021-11-25 19:12:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:13,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:13,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:13,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:13,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:12:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 194 conjunts are in the unsatisfiable core [2021-11-25 19:12:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:14,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:16,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323766388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:16,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787854026] [2021-11-25 19:12:16,974 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:12:16,974 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:12:16,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:12:16,975 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:12:16,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:12:17,123 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:12:17,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46116#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< |ULTIMATE.start_main_~j~0#1| 100) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< |ULTIMATE.start_main_~i~0#1| 200) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:12:17,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:12:17,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:12:17,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 204 [2021-11-25 19:12:17,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9868979] [2021-11-25 19:12:17,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2021-11-25 19:12:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:12:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2021-11-25 19:12:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20533, Invalid=24199, Unknown=0, NotChecked=0, Total=44732 [2021-11-25 19:12:17,907 INFO L87 Difference]: Start difference. First operand 1182 states and 1190 transitions. Second operand has 205 states, 205 states have (on average 2.1219512195121952) internal successors, (435), 204 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:26,791 INFO L93 Difference]: Finished difference Result 2333 states and 2468 transitions. [2021-11-25 19:12:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-11-25 19:12:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.1219512195121952) internal successors, (435), 204 states have internal predecessors, (435), 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 389 [2021-11-25 19:12:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:26,793 INFO L225 Difference]: With dead ends: 2333 [2021-11-25 19:12:26,793 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:12:26,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1146 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=20659, Invalid=27961, Unknown=0, NotChecked=0, Total=48620 [2021-11-25 19:12:26,798 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1636 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:26,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 317 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:12:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:12:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:12:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:12:26,800 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 389 [2021-11-25 19:12:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:26,800 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:12:26,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.1219512195121952) internal successors, (435), 204 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:12:26,801 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:12:26,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:12:26,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:27,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:12:27,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:12:27,030 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 34 38) no Hoare annotation was computed. [2021-11-25 19:12:27,030 INFO L858 garLoopResultBuilder]: For program point L35-3(lines 24 42) no Hoare annotation was computed. [2021-11-25 19:12:27,030 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-25 19:12:27,030 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:12:27,030 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-25 19:12:27,031 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:12:27,031 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-11-25 19:12:27,031 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 28 31) no Hoare annotation was computed. [2021-11-25 19:12:27,031 INFO L858 garLoopResultBuilder]: For program point L29-3(lines 24 42) no Hoare annotation was computed. [2021-11-25 19:12:27,031 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-25 19:12:27,031 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-11-25 19:12:27,031 INFO L861 garLoopResultBuilder]: At program point L39(lines 24 42) the Hoare annotation is: true [2021-11-25 19:12:27,031 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 38) no Hoare annotation was computed. [2021-11-25 19:12:27,034 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2021-11-25 19:12:27,035 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:12:27,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:12:27 BoogieIcfgContainer [2021-11-25 19:12:27,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:12:27,043 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:12:27,043 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:12:27,044 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:12:27,044 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:10:28" (3/4) ... [2021-11-25 19:12:27,047 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:12:27,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-25 19:12:27,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-25 19:12:27,058 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 19:12:27,058 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:12:27,085 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:12:27,085 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:12:27,086 INFO L158 Benchmark]: Toolchain (without parser) took 119468.91ms. Allocated memory was 121.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 88.5MB in the beginning and 1.0GB in the end (delta: -928.5MB). Peak memory consumption was 400.7MB. Max. memory is 16.1GB. [2021-11-25 19:12:27,086 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 86.0MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:12:27,087 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.17ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 98.3MB in the end (delta: -10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:12:27,087 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.37ms. Allocated memory is still 121.6MB. Free memory was 98.3MB in the beginning and 97.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:12:27,088 INFO L158 Benchmark]: Boogie Preprocessor took 40.41ms. Allocated memory is still 121.6MB. Free memory was 97.0MB in the beginning and 95.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:12:27,088 INFO L158 Benchmark]: RCFGBuilder took 258.11ms. Allocated memory is still 121.6MB. Free memory was 95.8MB in the beginning and 86.5MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:12:27,088 INFO L158 Benchmark]: TraceAbstraction took 118782.72ms. Allocated memory was 121.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 86.1MB in the beginning and 1.0GB in the end (delta: -932.9MB). Peak memory consumption was 397.5MB. Max. memory is 16.1GB. [2021-11-25 19:12:27,089 INFO L158 Benchmark]: Witness Printer took 42.24ms. Allocated memory is still 1.5GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:12:27,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 86.0MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.17ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 98.3MB in the end (delta: -10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.37ms. Allocated memory is still 121.6MB. Free memory was 98.3MB in the beginning and 97.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.41ms. Allocated memory is still 121.6MB. Free memory was 97.0MB in the beginning and 95.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 258.11ms. Allocated memory is still 121.6MB. Free memory was 95.8MB in the beginning and 86.5MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 118782.72ms. Allocated memory was 121.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 86.1MB in the beginning and 1.0GB in the end (delta: -932.9MB). Peak memory consumption was 397.5MB. Max. memory is 16.1GB. * Witness Printer took 42.24ms. Allocated memory is still 1.5GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: 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, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 118.7s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 39.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7503 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7503 mSDsluCounter, 2336 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2104 mSDsCounter, 3881 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3354 IncrementalHoareTripleChecker+Invalid, 7235 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3881 mSolverCounterUnsat, 242 mSDtfsCounter, 3354 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3550 GetRequests, 2322 SyntacticMatches, 8 SemanticMatches, 1220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57297 ImplicationChecksByTransitivity, 74.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1182occurred in iteration=9, InterpolantAutomatonStates: 977, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 6524 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 70.7s InterpolantComputationTime, 2388 NumberOfCodeBlocks, 2388 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 3160 ConstructedInterpolants, 0 QuantifiedInterpolants, 9421 SizeOfPredicates, 14 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 36290/162586 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: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 19:12:27,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46f0805-04cf-49c3-9e60-8f92256ee8e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE