./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8 --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 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8 --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 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:26:44,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:26:44,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:26:44,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:26:44,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:26:44,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:26:44,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:26:44,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:26:44,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:26:44,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:26:44,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:26:44,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:26:44,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:26:44,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:26:44,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:26:44,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:26:44,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:26:44,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:26:44,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:26:44,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:26:44,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:26:44,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:26:44,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:26:44,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:26:45,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:26:45,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:26:45,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:26:45,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:26:45,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:26:45,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:26:45,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:26:45,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:26:45,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:26:45,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:26:45,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:26:45,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:26:45,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:26:45,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:26:45,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:26:45,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:26:45,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:26:45,019 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:26:45,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:26:45,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:26:45,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:26:45,048 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:26:45,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:26:45,048 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:26:45,049 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:26:45,049 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:26:45,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:26:45,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:26:45,050 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:26:45,050 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:26:45,050 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:26:45,051 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:26:45,051 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:26:45,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:26:45,052 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:26:45,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:26:45,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:26:45,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:26:45,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:26:45,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:26:45,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:26:45,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:26:45,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:26:45,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:26:45,055 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:26:45,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:26:45,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:26:45,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:26:45,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:45,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:26:45,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:26:45,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:26:45,057 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:26:45,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:26:45,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:26:45,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:26:45,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:26:45,058 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_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 [2021-10-13 07:26:45,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:26:45,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:26:45,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:26:45,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:26:45,393 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:26:45,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-13 07:26:45,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/bf8076935/d790fa8d46de4487af5bea2081220453/FLAG795d7ac0c [2021-10-13 07:26:46,053 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:26:46,053 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-13 07:26:46,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/bf8076935/d790fa8d46de4487af5bea2081220453/FLAG795d7ac0c [2021-10-13 07:26:46,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/bf8076935/d790fa8d46de4487af5bea2081220453 [2021-10-13 07:26:46,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:26:46,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:26:46,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:46,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:26:46,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:26:46,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:46" (1/1) ... [2021-10-13 07:26:46,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c19e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:46, skipping insertion in model container [2021-10-13 07:26:46,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:46" (1/1) ... [2021-10-13 07:26:46,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:26:46,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:26:46,919 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-13 07:26:46,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:46,944 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:26:47,006 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-13 07:26:47,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:47,045 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:26:47,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47 WrapperNode [2021-10-13 07:26:47,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:47,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:47,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:26:47,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:26:47,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:47,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:26:47,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:26:47,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:26:47,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:26:47,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:26:47,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:26:47,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:26:47,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (1/1) ... [2021-10-13 07:26:47,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:47,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:47,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:26:47,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:26:47,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:26:47,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:26:47,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:26:47,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:26:47,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:26:47,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:26:47,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:26:47,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:26:47,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:26:47,613 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-13 07:26:47,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:47 BoogieIcfgContainer [2021-10-13 07:26:47,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:26:47,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:26:47,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:26:47,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:26:47,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:26:46" (1/3) ... [2021-10-13 07:26:47,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4595afbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:47, skipping insertion in model container [2021-10-13 07:26:47,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:47" (2/3) ... [2021-10-13 07:26:47,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4595afbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:47, skipping insertion in model container [2021-10-13 07:26:47,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:47" (3/3) ... [2021-10-13 07:26:47,627 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-10-13 07:26:47,634 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:26:47,634 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:26:47,688 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:26:47,695 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, mConcurrency=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 [2021-10-13 07:26:47,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:26:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:26:47,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:47,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:47,716 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2053014421, now seen corresponding path program 1 times [2021-10-13 07:26:47,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:47,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019184431] [2021-10-13 07:26:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:47,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:47,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:47,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019184431] [2021-10-13 07:26:47,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019184431] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:47,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:47,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:26:47,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472510221] [2021-10-13 07:26:47,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:26:47,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:26:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:47,977 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-10-13 07:26:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:47,995 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-10-13 07:26:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:26:47,996 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 [2021-10-13 07:26:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:48,006 INFO L225 Difference]: With dead ends: 25 [2021-10-13 07:26:48,006 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:26:48,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:26:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 07:26:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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) [2021-10-13 07:26:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-13 07:26:48,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-13 07:26:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:48,049 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-13 07:26:48,050 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) [2021-10-13 07:26:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-13 07:26:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:26:48,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:48,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:48,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:26:48,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1050421157, now seen corresponding path program 1 times [2021-10-13 07:26:48,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:48,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515034099] [2021-10-13 07:26:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:48,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:48,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:48,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515034099] [2021-10-13 07:26:48,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515034099] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:48,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:48,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:26:48,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070737148] [2021-10-13 07:26:48,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:48,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:48,254 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:48,318 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-10-13 07:26:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:26:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:48,321 INFO L225 Difference]: With dead ends: 25 [2021-10-13 07:26:48,321 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:26:48,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:26:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-13 07:26:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-13 07:26:48,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-10-13 07:26:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-13 07:26:48,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-13 07:26:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:26:48,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:48,330 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:48,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:26:48,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1615469636, now seen corresponding path program 1 times [2021-10-13 07:26:48,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:48,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517828035] [2021-10-13 07:26:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:48,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:48,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517828035] [2021-10-13 07:26:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517828035] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:48,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:48,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:26:48,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283649515] [2021-10-13 07:26:48,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:26:48,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:26:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:26:48,450 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-13 07:26:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:48,547 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-10-13 07:26:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-10-13 07:26:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:48,549 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:26:48,549 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:26:48,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:26:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-10-13 07:26:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-10-13 07:26:48,589 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-10-13 07:26:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:48,590 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-10-13 07:26:48,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-13 07:26:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-10-13 07:26:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:26:48,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:48,593 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:48,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:26:48,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 112411445, now seen corresponding path program 1 times [2021-10-13 07:26:48,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:48,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740937680] [2021-10-13 07:26:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:48,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:48,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:48,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740937680] [2021-10-13 07:26:48,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740937680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:26:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978931533] [2021-10-13 07:26:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:48,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:48,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:48,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:26:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:48,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:48,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978931533] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:49,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:26:49,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2021-10-13 07:26:49,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323824787] [2021-10-13 07:26:49,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:26:49,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:26:49,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:26:49,095 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:49,200 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-10-13 07:26:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:26:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:26:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:49,204 INFO L225 Difference]: With dead ends: 30 [2021-10-13 07:26:49,204 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 07:26:49,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:26:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 07:26:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-10-13 07:26:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-13 07:26:49,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-10-13 07:26:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:49,216 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-13 07:26:49,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-13 07:26:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:49,219 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:49,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:49,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:49,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:49,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1458886540, now seen corresponding path program 1 times [2021-10-13 07:26:49,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:49,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512014473] [2021-10-13 07:26:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:49,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:49,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:49,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512014473] [2021-10-13 07:26:49,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512014473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:26:49,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321049773] [2021-10-13 07:26:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:49,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:49,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:49,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:49,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:26:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:49,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321049773] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:49,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996622494] [2021-10-13 07:26:49,872 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 07:26:49,872 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:26:49,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:26:49,889 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:26:49,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:26:49,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:49,966 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:49,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:49,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:26:49,972 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:49,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:49,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:26:49,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:26:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:50,050 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:26:50,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:26:50,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:50,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:26:50,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:50,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:26:50,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:26:50,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:50,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:50,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:50,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-13 07:26:50,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:26:50,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:77 [2021-10-13 07:26:50,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:50,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:50,323 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_11| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:26:50,327 INFO L168 Benchmark]: Toolchain (without parser) took 3969.13 ms. Allocated memory is still 134.2 MB. Free memory was 91.4 MB in the beginning and 60.2 MB in the end (delta: 31.1 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:50,327 INFO L168 Benchmark]: CDTParser took 1.07 ms. Allocated memory is still 134.2 MB. Free memory was 109.5 MB in the beginning and 109.4 MB in the end (delta: 94.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:50,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.01 ms. Allocated memory is still 134.2 MB. Free memory was 91.2 MB in the beginning and 101.5 MB in the end (delta: -10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:50,329 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.98 ms. Allocated memory is still 134.2 MB. Free memory was 101.5 MB in the beginning and 99.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:50,329 INFO L168 Benchmark]: Boogie Preprocessor took 30.37 ms. Allocated memory is still 134.2 MB. Free memory was 99.4 MB in the beginning and 97.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:50,330 INFO L168 Benchmark]: RCFGBuilder took 472.81 ms. Allocated memory is still 134.2 MB. Free memory was 97.9 MB in the beginning and 83.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:50,331 INFO L168 Benchmark]: TraceAbstraction took 2706.60 ms. Allocated memory is still 134.2 MB. Free memory was 83.2 MB in the beginning and 60.2 MB in the end (delta: 23.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:50,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07 ms. Allocated memory is still 134.2 MB. Free memory was 109.5 MB in the beginning and 109.4 MB in the end (delta: 94.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 683.01 ms. Allocated memory is still 134.2 MB. Free memory was 91.2 MB in the beginning and 101.5 MB in the end (delta: -10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.98 ms. Allocated memory is still 134.2 MB. Free memory was 101.5 MB in the beginning and 99.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.37 ms. Allocated memory is still 134.2 MB. Free memory was 99.4 MB in the beginning and 97.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 472.81 ms. Allocated memory is still 134.2 MB. Free memory was 97.9 MB in the beginning and 83.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2706.60 ms. Allocated memory is still 134.2 MB. Free memory was 83.2 MB in the beginning and 60.2 MB in the end (delta: 23.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_11| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_11|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:26:50,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:26:53,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:26:53,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:26:53,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:26:53,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:26:53,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:26:53,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:26:53,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:26:53,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:26:53,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:26:53,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:26:53,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:26:53,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:26:53,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:26:53,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:26:53,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:26:53,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:26:53,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:26:53,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:26:53,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:26:53,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:26:53,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:26:53,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:26:53,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:26:53,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:26:53,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:26:53,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:26:53,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:26:53,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:26:53,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:26:53,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:26:53,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:26:53,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:26:53,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:26:53,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:26:53,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:26:53,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:26:53,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:26:53,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:26:53,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:26:53,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:26:53,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:26:53,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:26:53,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:26:53,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:26:53,466 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:26:53,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:26:53,469 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:26:53,472 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:26:53,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:26:53,474 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:26:53,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:26:53,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:26:53,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:26:53,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:26:53,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:26:53,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:26:53,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:26:53,479 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:26:53,479 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:26:53,479 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:26:53,480 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:26:53,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:26:53,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:26:53,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:26:53,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:26:53,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:26:53,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:26:53,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:53,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:26:53,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:26:53,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:26:53,483 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:26:53,483 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:53,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:26:53,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:26:53,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:26:53,484 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 [2021-10-13 07:26:53,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:26:54,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:26:54,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:26:54,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:26:54,021 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:26:54,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-13 07:26:54,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/99b101761/3ee8b7dd3c3a4698ab7283ebfaa836e9/FLAGcbbd49945 [2021-10-13 07:26:54,901 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:26:54,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-13 07:26:54,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/99b101761/3ee8b7dd3c3a4698ab7283ebfaa836e9/FLAGcbbd49945 [2021-10-13 07:26:55,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/data/99b101761/3ee8b7dd3c3a4698ab7283ebfaa836e9 [2021-10-13 07:26:55,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:26:55,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:26:55,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:55,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:26:55,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:26:55,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270f818a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55, skipping insertion in model container [2021-10-13 07:26:55,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:26:55,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:26:55,669 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-13 07:26:55,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:55,688 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:26:55,737 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-13 07:26:55,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:55,789 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:26:55,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55 WrapperNode [2021-10-13 07:26:55,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:55,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:55,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:26:55,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:26:55,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:55,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:26:55,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:26:55,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:26:55,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:26:55,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:26:55,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:26:55,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:26:55,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (1/1) ... [2021-10-13 07:26:55,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:55,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:56,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:26:56,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:26:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:26:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:26:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:26:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:26:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:26:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:26:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:26:56,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:26:56,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:26:56,483 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-13 07:26:56,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:56 BoogieIcfgContainer [2021-10-13 07:26:56,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:26:56,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:26:56,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:26:56,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:26:56,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:26:55" (1/3) ... [2021-10-13 07:26:56,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef641b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:56, skipping insertion in model container [2021-10-13 07:26:56,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:55" (2/3) ... [2021-10-13 07:26:56,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef641b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:56, skipping insertion in model container [2021-10-13 07:26:56,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:56" (3/3) ... [2021-10-13 07:26:56,496 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-10-13 07:26:56,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:26:56,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:26:56,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:26:56,574 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, mConcurrency=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 [2021-10-13 07:26:56,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:26:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 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) [2021-10-13 07:26:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:26:56,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:56,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:56,627 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -556870103, now seen corresponding path program 1 times [2021-10-13 07:26:56,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:56,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68315333] [2021-10-13 07:26:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:56,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:56,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:56,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:26:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:26:56,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:56,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:56,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:56,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68315333] [2021-10-13 07:26:56,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68315333] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:56,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:56,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:26:56,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156489410] [2021-10-13 07:26:56,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:26:56,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:26:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:56,967 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-10-13 07:26:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:56,991 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2021-10-13 07:26:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:26:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2021-10-13 07:26:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:57,005 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:26:57,005 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:26:57,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:26:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 07:26:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-13 07:26:57,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-10-13 07:26:57,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:57,074 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-13 07:26:57,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-10-13 07:26:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-13 07:26:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:26:57,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:57,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:57,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:57,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:57,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash 548273, now seen corresponding path program 1 times [2021-10-13 07:26:57,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:57,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989514796] [2021-10-13 07:26:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:57,295 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:57,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:57,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:26:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:26:57,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:57,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:57,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:57,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989514796] [2021-10-13 07:26:57,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989514796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:57,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:57,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:26:57,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186141340] [2021-10-13 07:26:57,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:57,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:57,656 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-13 07:26:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:57,798 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-10-13 07:26:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:26:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 12 [2021-10-13 07:26:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:57,800 INFO L225 Difference]: With dead ends: 41 [2021-10-13 07:26:57,800 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:26:57,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:26:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:26:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-10-13 07:26:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-13 07:26:57,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2021-10-13 07:26:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:57,810 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-13 07:26:57,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-13 07:26:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-13 07:26:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:26:57,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:57,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:57,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:58,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:58,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1319805396, now seen corresponding path program 1 times [2021-10-13 07:26:58,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:58,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210675966] [2021-10-13 07:26:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:58,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:58,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:58,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:26:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:58,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:58,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:58,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210675966] [2021-10-13 07:26:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210675966] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:58,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2131488463] [2021-10-13 07:26:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:58,418 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:58,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:58,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:58,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:26:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:58,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:26:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:58,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:58,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2131488463] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:58,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:26:58,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-10-13 07:26:58,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310214258] [2021-10-13 07:26:58,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:58,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:58,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:26:58,821 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-13 07:26:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:58,982 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-10-13 07:26:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:26:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2021-10-13 07:26:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:58,984 INFO L225 Difference]: With dead ends: 30 [2021-10-13 07:26:58,984 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 07:26:58,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:26:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 07:26:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-13 07:26:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-10-13 07:26:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-10-13 07:26:58,993 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2021-10-13 07:26:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:58,993 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-13 07:26:58,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-13 07:26:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-10-13 07:26:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:26:58,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:58,995 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:59,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:59,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:59,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:59,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1984051427, now seen corresponding path program 1 times [2021-10-13 07:26:59,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:59,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4185822] [2021-10-13 07:26:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:59,399 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:59,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:59,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:59,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:26:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:59,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:59,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:59,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:59,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4185822] [2021-10-13 07:26:59,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4185822] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:59,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634822538] [2021-10-13 07:26:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:59,844 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:59,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:59,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:27:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:27:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:00,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:00,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1634822538] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:00,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874737048] [2021-10-13 07:27:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:00,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:00,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:00,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:27:00,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:27:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:27:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:00,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:00,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874737048] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:00,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:00,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2021-10-13 07:27:00,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467393257] [2021-10-13 07:27:00,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:27:00,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:27:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:27:00,675 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2021-10-13 07:27:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:01,229 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-13 07:27:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:27:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 [2021-10-13 07:27:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:01,238 INFO L225 Difference]: With dead ends: 74 [2021-10-13 07:27:01,238 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 07:27:01,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:27:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 07:27:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2021-10-13 07:27:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2021-10-13 07:27:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-13 07:27:01,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2021-10-13 07:27:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:01,252 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-13 07:27:01,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2021-10-13 07:27:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-13 07:27:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:27:01,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:01,254 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:01,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:01,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:01,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 07:27:01,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:01,870 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1678334144, now seen corresponding path program 2 times [2021-10-13 07:27:01,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:01,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041035103] [2021-10-13 07:27:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:01,871 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:01,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:01,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:27:01,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:27:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:02,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:02,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:02,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041035103] [2021-10-13 07:27:02,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041035103] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:02,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1804147986] [2021-10-13 07:27:02,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:02,356 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:02,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:02,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:02,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:27:02,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:27:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:02,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:02,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1804147986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:02,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686342465] [2021-10-13 07:27:02,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:02,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:02,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:02,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:27:02,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:27:02,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:02,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:27:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:03,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 07:27:03,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 07:27:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:27:03,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:27:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686342465] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:03,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:03,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-10-13 07:27:03,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028583315] [2021-10-13 07:27:03,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:27:03,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:03,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:27:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:27:03,360 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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) [2021-10-13 07:27:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:06,027 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2021-10-13 07:27:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 07:27:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 07:27:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:06,029 INFO L225 Difference]: With dead ends: 108 [2021-10-13 07:27:06,029 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 07:27:06,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1856.9ms TimeCoverageRelationStatistics Valid=550, Invalid=2530, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 07:27:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 07:27:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 35. [2021-10-13 07:27:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-10-13 07:27:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-10-13 07:27:06,042 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2021-10-13 07:27:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:06,043 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-10-13 07:27:06,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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) [2021-10-13 07:27:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-10-13 07:27:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:27:06,045 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:06,045 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:06,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:06,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:06,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:06,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:06,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2006307975, now seen corresponding path program 1 times [2021-10-13 07:27:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:06,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689368959] [2021-10-13 07:27:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:06,661 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:06,662 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:06,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:27:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:27:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:27:07,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:27:07,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:07,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689368959] [2021-10-13 07:27:07,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689368959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:07,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541825546] [2021-10-13 07:27:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:07,142 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:07,147 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:07,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:27:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:27:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:27:07,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:27:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541825546] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:07,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499886802] [2021-10-13 07:27:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:07,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:07,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:27:07,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:27:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:27:07,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:27:07,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:27:08,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499886802] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:08,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:08,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2021-10-13 07:27:08,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868033936] [2021-10-13 07:27:08,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:27:08,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:27:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:27:08,045 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:08,162 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-10-13 07:27:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:27:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 07:27:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:08,164 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:27:08,164 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 07:27:08,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:27:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 07:27:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-10-13 07:27:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 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) [2021-10-13 07:27:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-10-13 07:27:08,179 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 23 [2021-10-13 07:27:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:08,179 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-10-13 07:27:08,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-10-13 07:27:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:27:08,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:08,181 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:08,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:08,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:08,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:08,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:08,795 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2014350824, now seen corresponding path program 2 times [2021-10-13 07:27:08,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:08,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289224052] [2021-10-13 07:27:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:08,797 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:08,798 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:08,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:27:09,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:09,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:27:09,126 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:27:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:27:09,278 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:27:09,279 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:27:09,280 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:27:09,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:09,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:27:09,501 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:27:09,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:27:09 BoogieIcfgContainer [2021-10-13 07:27:09,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:27:09,562 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:27:09,562 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:27:09,563 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:27:09,563 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:56" (3/4) ... [2021-10-13 07:27:09,568 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:27:09,647 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:27:09,647 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:27:09,649 INFO L168 Benchmark]: Toolchain (without parser) took 14460.16 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 33.8 MB in the beginning and 64.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:09,649 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 56.6 MB. Free memory is still 38.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:09,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.53 ms. Allocated memory is still 56.6 MB. Free memory was 33.6 MB in the beginning and 32.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:09,651 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.87 ms. Allocated memory is still 56.6 MB. Free memory was 32.2 MB in the beginning and 30.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:09,651 INFO L168 Benchmark]: Boogie Preprocessor took 65.31 ms. Allocated memory is still 56.6 MB. Free memory was 30.2 MB in the beginning and 28.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:09,652 INFO L168 Benchmark]: RCFGBuilder took 533.37 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 28.6 MB in the beginning and 59.2 MB in the end (delta: -30.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:09,653 INFO L168 Benchmark]: TraceAbstraction took 13073.44 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 58.5 MB in the beginning and 67.1 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:09,653 INFO L168 Benchmark]: Witness Printer took 84.91 ms. Allocated memory is still 100.7 MB. Free memory was 67.1 MB in the beginning and 64.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:09,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 56.6 MB. Free memory is still 38.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 598.53 ms. Allocated memory is still 56.6 MB. Free memory was 33.6 MB in the beginning and 32.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.87 ms. Allocated memory is still 56.6 MB. Free memory was 32.2 MB in the beginning and 30.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.31 ms. Allocated memory is still 56.6 MB. Free memory was 30.2 MB in the beginning and 28.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 533.37 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 28.6 MB in the beginning and 59.2 MB in the end (delta: -30.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13073.44 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 58.5 MB in the beginning and 67.1 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Witness Printer took 84.91 ms. Allocated memory is still 100.7 MB. Free memory was 67.1 MB in the beginning and 64.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L603] int len = 2; [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L575] SLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND FALSE !(len > 0) [L585] return head; [L607] SLL s = sll_create(len + 1); [L588] int len = 0; [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) [L593] return len; [L608] COND TRUE len != sll_length(s) [L613] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12935.0ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 43.8ms, AutomataDifference: 3739.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 397 SDslu, 384 SDs, 0 SdLazy, 767 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1312.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 509 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2795.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=6, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 122 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 172.3ms SsaConstructionTime, 534.9ms SatisfiabilityAnalysisTime, 3358.1ms InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 452 ConstructedInterpolants, 0 QuantifiedInterpolants, 1214 SizeOfPredicates, 44 NumberOfNonLiveVariables, 880 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 96/170 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:27:09,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2c39c0-1b88-4c28-9772-a8ecf07febd6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...