./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl --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 b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:53,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:53,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:53,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:53,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:53,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:53,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:53,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:53,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:53,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:53,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:53,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:53,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:53,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:53,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:53,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:53,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:53,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:53,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:53,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:53,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:53,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:53,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:53,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:53,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:53,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:53,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:53,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:53,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:53,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:53,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:53,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:53,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:53,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:53,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:53,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:53,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:53,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:53,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:53,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:53,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:53,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:24:53,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:53,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:53,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:53,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:53,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:53,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:53,457 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:53,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:53,457 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:53,458 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:24:53,458 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:53,458 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:53,459 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:24:53,459 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:24:53,459 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:53,459 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:24:53,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:24:53,460 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:24:53,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:53,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:53,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:24:53,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:53,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:53,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:53,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:53,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:53,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:53,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:53,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:53,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:53,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:53,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:53,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:53,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:53,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:53,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:53,464 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:24:53,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:24:53,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:53,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:53,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:53,465 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_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 [2021-11-23 17:24:53,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:53,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:53,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:53,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:53,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:53,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-23 17:24:53,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/84b0d2a95/d177cc4c253c4cc99edef6978cd5e34b/FLAG83369999d [2021-11-23 17:24:54,334 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:54,335 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-23 17:24:54,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/84b0d2a95/d177cc4c253c4cc99edef6978cd5e34b/FLAG83369999d [2021-11-23 17:24:54,720 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/84b0d2a95/d177cc4c253c4cc99edef6978cd5e34b [2021-11-23 17:24:54,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:54,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:54,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:54,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:54,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:54,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:54,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8bcf0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54, skipping insertion in model container [2021-11-23 17:24:54,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:54,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:54,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:54,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-23 17:24:54,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:54,951 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:54,975 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-23 17:24:54,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:54,997 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:54,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54 WrapperNode [2021-11-23 17:24:54,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:54,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:54,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:54,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:55,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,041 INFO L137 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-23 17:24:55,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:55,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:55,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:55,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:55,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:55,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:55,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:55,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:55,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:55,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:55,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:55,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:24:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:24:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:24:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:24:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:24:55,226 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:55,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:55,382 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:55,413 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:24:55,426 INFO L158 Benchmark]: Toolchain (without parser) took 692.75ms. Allocated memory is still 98.6MB. Free memory was 65.4MB in the beginning and 60.5MB in the end (delta: 4.9MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2021-11-23 17:24:55,437 INFO L158 Benchmark]: CDTParser took 0.68ms. Allocated memory is still 98.6MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:24:55,438 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.86ms. Allocated memory is still 98.6MB. Free memory was 65.3MB in the beginning and 74.0MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:24:55,439 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.73ms. Allocated memory is still 98.6MB. Free memory was 73.7MB in the beginning and 72.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:24:55,440 INFO L158 Benchmark]: Boogie Preprocessor took 25.55ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 71.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:24:55,441 INFO L158 Benchmark]: RCFGBuilder took 347.37ms. Allocated memory is still 98.6MB. Free memory was 71.0MB in the beginning and 60.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:24:55,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68ms. Allocated memory is still 98.6MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.86ms. Allocated memory is still 98.6MB. Free memory was 65.3MB in the beginning and 74.0MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.73ms. Allocated memory is still 98.6MB. Free memory was 73.7MB in the beginning and 72.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.55ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 71.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 347.37ms. Allocated memory is still 98.6MB. Free memory was 71.0MB in the beginning and 60.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:24:55,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl --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 b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:58,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:58,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:58,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:58,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:58,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:58,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:58,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:58,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:58,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:58,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:58,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:58,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:58,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:58,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:58,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:58,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:58,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:58,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:58,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:58,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:58,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:58,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:58,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:58,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:58,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:58,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:58,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:58,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:58,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:58,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:58,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:58,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:58,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:58,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:58,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:58,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:58,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:58,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:58,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:58,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:58,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:24:58,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:58,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:58,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:58,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:58,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:58,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:58,165 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:58,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:58,165 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:58,166 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:58,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:58,166 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:58,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:58,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:58,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:58,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:58,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:58,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:58,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:58,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:24:58,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:24:58,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:24:58,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:58,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:58,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:58,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:58,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:58,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:24:58,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:58,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:58,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:58,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:58,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:58,173 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:24:58,174 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:58,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:58,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:58,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:58,175 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_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 [2021-11-23 17:24:58,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:58,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:58,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:58,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:58,579 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:58,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-23 17:24:58,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/0b5b94549/dcc0893461774f0d8915671fdf740478/FLAG28dac223c [2021-11-23 17:24:59,219 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:59,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-23 17:24:59,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/0b5b94549/dcc0893461774f0d8915671fdf740478/FLAG28dac223c [2021-11-23 17:24:59,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/data/0b5b94549/dcc0893461774f0d8915671fdf740478 [2021-11-23 17:24:59,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:59,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:59,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:59,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:59,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:59,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd9d395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59, skipping insertion in model container [2021-11-23 17:24:59,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:59,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:59,807 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-23 17:24:59,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:59,843 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:59,868 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-23 17:24:59,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:59,910 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:59,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59 WrapperNode [2021-11-23 17:24:59,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:59,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:59,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:59,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:59,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,990 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-23 17:24:59,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:59,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:59,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:59,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:25:00,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:25:00,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:25:00,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:25:00,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:25:00,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:00,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:00,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:25:00,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:25:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:25:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:25:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:25:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:25:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:25:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:25:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:25:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:25:00,254 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:25:00,256 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:25:00,480 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:25:00,486 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:25:00,501 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:25:00,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:00 BoogieIcfgContainer [2021-11-23 17:25:00,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:25:00,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:25:00,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:25:00,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:25:00,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:24:59" (1/3) ... [2021-11-23 17:25:00,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc101ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:00, skipping insertion in model container [2021-11-23 17:25:00,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (2/3) ... [2021-11-23 17:25:00,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc101ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:00, skipping insertion in model container [2021-11-23 17:25:00,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:00" (3/3) ... [2021-11-23 17:25:00,511 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2021-11-23 17:25:00,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:25:00,529 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:25:00,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:25:00,634 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:25:00,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:25:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:25:00,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:00,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:00,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:00,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-11-23 17:25:00,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115864981] [2021-11-23 17:25:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:00,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:00,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:00,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:25:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:00,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:00,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115864981] [2021-11-23 17:25:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115864981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:00,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:00,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:00,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167209653] [2021-11-23 17:25:00,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:00,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:00,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:01,006 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:01,084 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-11-23 17:25:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:01,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:25:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:01,094 INFO L225 Difference]: With dead ends: 34 [2021-11-23 17:25:01,095 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 17:25:01,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:01,102 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:01,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 17:25:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-23 17:25:01,144 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) [2021-11-23 17:25:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-23 17:25:01,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-11-23 17:25:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:01,148 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-23 17:25:01,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-23 17:25:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:25:01,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:01,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:01,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:01,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:01,361 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2021-11-23 17:25:01,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:01,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230947870] [2021-11-23 17:25:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:01,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:01,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:01,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:01,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:25:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:01,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:01,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:01,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230947870] [2021-11-23 17:25:01,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230947870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:01,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2050636533] [2021-11-23 17:25:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:01,619 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:01,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:01,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:25:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:01,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:01,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:01,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:01,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2050636533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546176695] [2021-11-23 17:25:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:01,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:01,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:01,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:25:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:01,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:01,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546176695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:01,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:25:01,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4] total 7 [2021-11-23 17:25:01,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399683392] [2021-11-23 17:25:01,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:01,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:01,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:25:01,970 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:02,039 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-23 17:25:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:25:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:02,040 INFO L225 Difference]: With dead ends: 25 [2021-11-23 17:25:02,040 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 17:25:02,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:25:02,042 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:02,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:25:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 17:25:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-23 17:25:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-23 17:25:02,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-11-23 17:25:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:02,056 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-23 17:25:02,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-23 17:25:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:25:02,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:02,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:02,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:02,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:02,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 17:25:02,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:02,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-11-23 17:25:02,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:02,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839263725] [2021-11-23 17:25:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:02,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:02,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:02,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:25:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:02,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:02,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:02,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839263725] [2021-11-23 17:25:02,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839263725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [24468620] [2021-11-23 17:25:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:02,930 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:02,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:02,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:25:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:03,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:03,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:03,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:03,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [24468620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788365777] [2021-11-23 17:25:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:03,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:03,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:03,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:25:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:03,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:03,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788365777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:03,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:03,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 8 [2021-11-23 17:25:03,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806680033] [2021-11-23 17:25:03,390 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:03,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:03,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:03,393 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:03,587 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-23 17:25:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:25:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 13 [2021-11-23 17:25:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:03,589 INFO L225 Difference]: With dead ends: 52 [2021-11-23 17:25:03,589 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 17:25:03,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:25:03,591 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:03,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 25 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:25:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 17:25:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2021-11-23 17:25:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2021-11-23 17:25:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-23 17:25:03,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-11-23 17:25:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:03,600 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-23 17:25:03,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-23 17:25:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 17:25:03,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:03,602 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:03,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:03,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 17:25:04,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 17:25:04,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:04,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 2 times [2021-11-23 17:25:04,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:04,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718278232] [2021-11-23 17:25:04,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:25:04,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:04,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:04,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:04,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:25:04,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:25:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:25:04,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:25:04,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:04,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718278232] [2021-11-23 17:25:04,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718278232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:04,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606097479] [2021-11-23 17:25:04,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:25:04,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:04,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:04,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:04,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:25:04,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:25:04,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:25:05,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:25:05,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606097479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:05,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952110094] [2021-11-23 17:25:05,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:25:05,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:05,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:05,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:05,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:25:05,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:25:05,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:25:05,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:25:05,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952110094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:05,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:05,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 14 [2021-11-23 17:25:05,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574472873] [2021-11-23 17:25:05,504 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:05,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:25:05,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:25:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:25:05,506 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:06,155 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2021-11-23 17:25:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:25:06,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 17:25:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:06,158 INFO L225 Difference]: With dead ends: 118 [2021-11-23 17:25:06,158 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 17:25:06,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:25:06,160 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 236 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:06,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 107 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:25:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 17:25:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2021-11-23 17:25:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-23 17:25:06,171 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 25 [2021-11-23 17:25:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:06,172 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-23 17:25:06,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-23 17:25:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 17:25:06,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:06,174 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:06,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:06,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:06,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:06,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:06,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 3 times [2021-11-23 17:25:06,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:06,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049913838] [2021-11-23 17:25:06,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:25:06,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:06,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:06,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:25:07,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:25:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:25:07,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:25:08,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:08,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049913838] [2021-11-23 17:25:08,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049913838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:08,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194703835] [2021-11-23 17:25:08,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:25:08,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:08,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:08,469 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:08,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:25:09,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:25:09,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:09,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:25:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:25:09,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:25:11,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194703835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:11,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136788749] [2021-11-23 17:25:11,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:25:11,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:11,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:11,605 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:11,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:25:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:25:25,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:25:25,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:25:25,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:25:25,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136788749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:25,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:25,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 15, 13, 14] total 37 [2021-11-23 17:25:25,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83047153] [2021-11-23 17:25:25,473 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:25,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 17:25:25,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 17:25:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:25:25,476 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:29,117 INFO L93 Difference]: Finished difference Result 250 states and 277 transitions. [2021-11-23 17:25:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:25:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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 49 [2021-11-23 17:25:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:29,120 INFO L225 Difference]: With dead ends: 250 [2021-11-23 17:25:29,120 INFO L226 Difference]: Without dead ends: 221 [2021-11-23 17:25:29,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=727, Invalid=1625, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:25:29,123 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1268 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:29,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 533 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 17:25:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-23 17:25:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 100. [2021-11-23 17:25:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-11-23 17:25:29,140 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 49 [2021-11-23 17:25:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:29,140 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-11-23 17:25:29,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-11-23 17:25:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:25:29,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:29,145 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:29,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:29,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:25:29,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:29,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash -500972291, now seen corresponding path program 4 times [2021-11-23 17:25:29,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:29,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842863] [2021-11-23 17:25:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:25:29,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:29,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:29,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:25:30,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:25:30,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:30,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:25:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:25:30,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:25:33,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842863] [2021-11-23 17:25:33,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1292417896] [2021-11-23 17:25:33,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:25:33,498 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:33,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:33,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:33,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:25:33,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:25:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:25:33,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:25:34,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:25:34,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1292417896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:34,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350402012] [2021-11-23 17:25:34,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:25:34,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:34,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:34,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:34,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:25:34,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:25:34,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:25:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:25:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:25:35,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350402012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:35,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:35,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 26, 26] total 50 [2021-11-23 17:25:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514015790] [2021-11-23 17:25:35,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:35,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 17:25:35,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 17:25:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 17:25:35,521 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 50 states, 50 states have (on average 4.02) internal successors, (201), 50 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:47,523 INFO L93 Difference]: Finished difference Result 514 states and 565 transitions. [2021-11-23 17:25:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 17:25:47,524 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.02) internal successors, (201), 50 states have internal predecessors, (201), 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 97 [2021-11-23 17:25:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:47,528 INFO L225 Difference]: With dead ends: 514 [2021-11-23 17:25:47,528 INFO L226 Difference]: Without dead ends: 461 [2021-11-23 17:25:47,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 17:25:47,533 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 2962 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2962 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:47,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2962 Valid, 2142 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 3386 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 17:25:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-23 17:25:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 196. [2021-11-23 17:25:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-11-23 17:25:47,560 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 97 [2021-11-23 17:25:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:47,561 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-11-23 17:25:47,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.02) internal successors, (201), 50 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-11-23 17:25:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-23 17:25:47,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:47,573 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:47,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:47,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:48,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:48,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:48,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1630342813, now seen corresponding path program 5 times [2021-11-23 17:25:48,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:48,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44238043] [2021-11-23 17:25:48,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:25:48,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:48,180 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:48,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:26:01,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:26:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:26:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 17:26:03,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 17:26:13,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44238043] [2021-11-23 17:26:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44238043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196006543] [2021-11-23 17:26:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:26:13,385 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:13,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:13,387 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:13,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca0ad7b-a2f6-4c44-94eb-08ff2ebca2a0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process