./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:29:44,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:29:44,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:29:44,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:29:44,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:29:44,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:29:44,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:29:44,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:29:44,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:29:44,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:29:44,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:29:44,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:29:44,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:29:44,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:29:44,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:29:44,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:29:44,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:29:44,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:29:44,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:29:44,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:29:44,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:29:44,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:29:44,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:29:44,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:29:44,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:29:44,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:29:44,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:29:44,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:29:44,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:29:44,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:29:44,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:29:44,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:29:44,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:29:44,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:29:44,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:29:44,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:29:44,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:29:44,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:29:44,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:29:44,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:29:44,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:29:44,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:29:44,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:29:44,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:29:44,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:29:44,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:29:44,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:29:44,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:29:44,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:29:44,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:29:44,716 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:29:44,716 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:29:44,717 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:29:44,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:29:44,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:29:44,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:29:44,718 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:29:44,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:29:44,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:29:44,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:29:44,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:29:44,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:29:44,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:29:44,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:29:44,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:29:44,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:29:44,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:29:44,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:29:44,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:29:44,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:29:44,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:29:44,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:29:44,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:29:44,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:29:44,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:29:44,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:29:44,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:29:44,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:29:44,732 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:29:44,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:29:44,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:29:44,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:29:44,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:29:44,733 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_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2021-11-25 20:29:45,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:29:45,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:29:45,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:29:45,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:29:45,068 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:29:45,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-25 20:29:45,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/data/930c1e586/79dfae9756bb4261bf3ac1815ba9387c/FLAG240406b40 [2021-11-25 20:29:45,657 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:29:45,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-25 20:29:45,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/data/930c1e586/79dfae9756bb4261bf3ac1815ba9387c/FLAG240406b40 [2021-11-25 20:29:46,059 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/data/930c1e586/79dfae9756bb4261bf3ac1815ba9387c [2021-11-25 20:29:46,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:29:46,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:29:46,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:29:46,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:29:46,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:29:46,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47aaf6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46, skipping insertion in model container [2021-11-25 20:29:46,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:29:46,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:29:46,226 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_41f2c51d-2399-4017-8060-b80c6465cdb7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-25 20:29:46,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:29:46,251 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:29:46,263 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_41f2c51d-2399-4017-8060-b80c6465cdb7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-25 20:29:46,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:29:46,284 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:29:46,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46 WrapperNode [2021-11-25 20:29:46,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:29:46,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:29:46,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:29:46,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:29:46,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,321 INFO L137 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2021-11-25 20:29:46,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:29:46,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:29:46,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:29:46,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:29:46,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:29:46,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:29:46,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:29:46,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:29:46,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (1/1) ... [2021-11-25 20:29:46,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:29:46,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:46,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:29:46,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:29:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:29:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:29:46,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:29:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:29:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:29:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:29:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:29:46,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:29:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:29:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:29:46,540 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:29:46,542 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:29:46,731 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:29:46,783 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:29:46,783 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:29:46,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:29:46 BoogieIcfgContainer [2021-11-25 20:29:46,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:29:46,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:29:46,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:29:46,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:29:46,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:29:46" (1/3) ... [2021-11-25 20:29:46,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253b6c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:29:46, skipping insertion in model container [2021-11-25 20:29:46,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:46" (2/3) ... [2021-11-25 20:29:46,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253b6c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:29:46, skipping insertion in model container [2021-11-25 20:29:46,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:29:46" (3/3) ... [2021-11-25 20:29:46,810 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2021-11-25 20:29:46,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:29:46,816 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:29:46,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:29:46,896 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:29:46,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:29:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:29:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:29:46,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:46,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:29:46,920 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:46,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2021-11-25 20:29:46,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438261887] [2021-11-25 20:29:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:46,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:29:47,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:47,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438261887] [2021-11-25 20:29:47,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438261887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:47,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:47,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:29:47,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008884783] [2021-11-25 20:29:47,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:47,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:29:47,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:29:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:47,214 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:29:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:47,279 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2021-11-25 20:29:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:29:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-25 20:29:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:47,292 INFO L225 Difference]: With dead ends: 27 [2021-11-25 20:29:47,292 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:29:47,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:47,311 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:47,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:29:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:29:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-11-25 20:29:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:29:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-25 20:29:47,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2021-11-25 20:29:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-25 20:29:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:29:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-25 20:29:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:29:47,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:47,361 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:47,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:29:47,365 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2021-11-25 20:29:47,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:47,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176546281] [2021-11-25 20:29:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:47,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:29:47,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176546281] [2021-11-25 20:29:47,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176546281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:47,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:47,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:29:47,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555447731] [2021-11-25 20:29:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:47,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:29:47,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:29:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:29:47,490 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:29:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:47,586 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-25 20:29:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:29:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2021-11-25 20:29:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:47,589 INFO L225 Difference]: With dead ends: 25 [2021-11-25 20:29:47,590 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:29:47,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:29:47,592 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:47,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:29:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:29:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-11-25 20:29:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:29:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-25 20:29:47,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2021-11-25 20:29:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:47,600 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-25 20:29:47,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:29:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-25 20:29:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:29:47,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:47,601 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:47,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:29:47,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:47,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2021-11-25 20:29:47,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:47,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280804735] [2021-11-25 20:29:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:47,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:29:47,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280804735] [2021-11-25 20:29:47,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280804735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:29:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626330564] [2021-11-25 20:29:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:47,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:47,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:47,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:47,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:29:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:47,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:29:47,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:29:48,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:29:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:29:48,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626330564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:29:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984945663] [2021-11-25 20:29:48,171 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:29:48,172 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:29:48,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:29:48,183 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:29:48,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:29:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:48,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:48,489 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 20:29:48,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 20:29:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:48,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 20:29:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:49,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 20:29:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:55,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:55,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:55,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:55,345 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 20:29:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 561 treesize of output 527 [2021-11-25 20:29:58,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,103 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:29:58,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:29:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,377 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:29:58,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:29:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,451 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:29:58,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:29:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:58,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,575 INFO L354 Elim1Store]: treesize reduction 66, result has 38.3 percent of original size [2021-11-25 20:29:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 164 [2021-11-25 20:29:58,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:58,684 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:29:58,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:29:59,046 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2021-11-25 20:29:59,047 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:29:59,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 20:29:59,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:29:59,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:29:59,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-25 20:29:59,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695422769] [2021-11-25 20:29:59,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:29:59,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:29:59,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:29:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:29:59,889 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:30:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:00,048 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-25 20:30:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:30:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2021-11-25 20:30:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:00,050 INFO L225 Difference]: With dead ends: 52 [2021-11-25 20:30:00,050 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 20:30:00,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:30:00,053 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:00,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:30:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 20:30:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2021-11-25 20:30:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 20:30:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2021-11-25 20:30:00,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2021-11-25 20:30:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:00,070 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2021-11-25 20:30:00,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:30:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2021-11-25 20:30:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:30:00,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:00,075 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:00,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:30:00,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 20:30:00,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2021-11-25 20:30:00,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:00,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334460540] [2021-11-25 20:30:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:00,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-25 20:30:00,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334460540] [2021-11-25 20:30:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334460540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:30:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439262688] [2021-11-25 20:30:00,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:30:00,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:00,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:30:00,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:30:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:30:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:30:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:30:00,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:30:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-25 20:30:00,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:30:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-25 20:30:00,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439262688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:30:00,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803310239] [2021-11-25 20:30:00,979 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:30:00,979 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:30:00,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:30:00,980 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:30:00,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:30:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,086 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 20:30:01,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 20:30:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,211 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 20:30:01,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 20:30:01,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 20:30:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:06,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:06,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:06,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:06,325 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 20:30:06,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 561 treesize of output 527 [2021-11-25 20:30:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:13,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,128 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:30:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:30:13,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,396 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:30:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:30:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,475 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-25 20:30:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2021-11-25 20:30:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:13,654 INFO L354 Elim1Store]: treesize reduction 210, result has 36.0 percent of original size [2021-11-25 20:30:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 168 [2021-11-25 20:30:15,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:15,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:15,801 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:30:15,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:30:16,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2021-11-25 20:30:16,133 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:30:16,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '752#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#c~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#c~0#1.offset| 0) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:30:16,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:30:16,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:30:16,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2021-11-25 20:30:16,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085365961] [2021-11-25 20:30:16,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:30:16,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 20:30:16,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 20:30:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:30:16,682 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-25 20:30:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:17,087 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2021-11-25 20:30:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:30:17,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2021-11-25 20:30:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:17,090 INFO L225 Difference]: With dead ends: 121 [2021-11-25 20:30:17,090 INFO L226 Difference]: Without dead ends: 111 [2021-11-25 20:30:17,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 20:30:17,092 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 115 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:17,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 42 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:30:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-25 20:30:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2021-11-25 20:30:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 20:30:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2021-11-25 20:30:17,119 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2021-11-25 20:30:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:17,120 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2021-11-25 20:30:17,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-25 20:30:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2021-11-25 20:30:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 20:30:17,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:17,128 INFO L514 BasicCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:17,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:17,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:17,354 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2021-11-25 20:30:17,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:17,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983728782] [2021-11-25 20:30:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:17,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-25 20:30:17,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983728782] [2021-11-25 20:30:17,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983728782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:30:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101641994] [2021-11-25 20:30:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:30:17,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:17,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:30:17,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:30:22,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:30:22,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:30:22,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:30:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:30:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-25 20:30:23,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:30:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-25 20:30:23,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101641994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:30:23,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [806740288] [2021-11-25 20:30:23,840 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:30:23,840 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:30:23,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:30:23,840 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:30:23,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:30:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:23,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:23,968 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 20:30:23,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 20:30:23,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:23,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:23,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 20:30:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 20:30:28,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:28,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:28,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:28,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:28,260 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 20:30:28,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 561 treesize of output 527 [2021-11-25 20:30:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,480 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:30:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:30:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,725 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:30:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:30:34,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,789 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:30:34,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:30:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,900 INFO L354 Elim1Store]: treesize reduction 66, result has 38.3 percent of original size [2021-11-25 20:30:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 131 [2021-11-25 20:30:34,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:34,976 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:30:34,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:30:35,195 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 20:30:35,199 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:30:35,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1871#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#c~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#c~0#1.offset| 0) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:30:35,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:30:35,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:30:35,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2021-11-25 20:30:35,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006474399] [2021-11-25 20:30:35,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:30:35,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 20:30:35,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 20:30:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 20:30:35,708 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2021-11-25 20:30:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:36,581 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2021-11-25 20:30:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:30:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2021-11-25 20:30:36,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:36,593 INFO L225 Difference]: With dead ends: 259 [2021-11-25 20:30:36,593 INFO L226 Difference]: Without dead ends: 243 [2021-11-25 20:30:36,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:30:36,598 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 407 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:36,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 90 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:30:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-25 20:30:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2021-11-25 20:30:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-25 20:30:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2021-11-25 20:30:36,663 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2021-11-25 20:30:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:36,664 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2021-11-25 20:30:36,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2021-11-25 20:30:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2021-11-25 20:30:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-25 20:30:36,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:36,675 INFO L514 BasicCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:36,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:36,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:36,876 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2021-11-25 20:30:36,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:36,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302217192] [2021-11-25 20:30:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:36,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2021-11-25 20:30:37,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302217192] [2021-11-25 20:30:37,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302217192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:30:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026211356] [2021-11-25 20:30:37,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:30:37,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:37,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:30:37,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:30:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:30:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:30:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2021-11-25 20:30:38,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:30:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2021-11-25 20:30:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026211356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:30:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824461645] [2021-11-25 20:30:40,152 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:30:40,152 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:30:40,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:30:40,153 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:30:40,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:30:40,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,287 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 20:30:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 20:30:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 20:30:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:40,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 20:30:44,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:44,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:44,282 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 20:30:44,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 561 treesize of output 527 [2021-11-25 20:30:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,409 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:30:46,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:30:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,615 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:30:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:30:46,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,672 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:30:46,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:30:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:46,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,757 INFO L354 Elim1Store]: treesize reduction 66, result has 38.3 percent of original size [2021-11-25 20:30:46,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 150 treesize of output 168 [2021-11-25 20:30:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:30:46,855 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:30:46,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:30:47,083 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2021-11-25 20:30:47,084 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:30:47,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4251#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 20:30:47,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:30:47,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:30:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2021-11-25 20:30:47,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479970632] [2021-11-25 20:30:47,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:30:47,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-25 20:30:47,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-25 20:30:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2522, Invalid=3958, Unknown=0, NotChecked=0, Total=6480 [2021-11-25 20:30:47,520 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2021-11-25 20:30:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:49,794 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2021-11-25 20:30:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 20:30:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2021-11-25 20:30:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:49,808 INFO L225 Difference]: With dead ends: 535 [2021-11-25 20:30:49,808 INFO L226 Difference]: Without dead ends: 507 [2021-11-25 20:30:49,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3742, Invalid=6970, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 20:30:49,816 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1085 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:49,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1088 Valid, 165 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:30:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-25 20:30:49,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2021-11-25 20:30:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2021-11-25 20:30:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2021-11-25 20:30:49,883 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2021-11-25 20:30:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:49,885 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2021-11-25 20:30:49,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2021-11-25 20:30:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2021-11-25 20:30:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2021-11-25 20:30:49,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:49,912 INFO L514 BasicCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:49,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:50,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:50,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2021-11-25 20:30:50,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203597670] [2021-11-25 20:30:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:50,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2021-11-25 20:30:51,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:51,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203597670] [2021-11-25 20:30:51,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203597670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:30:51,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188632655] [2021-11-25 20:30:51,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:30:51,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:51,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:30:51,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:34:24,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 20:34:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:34:24,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 20:34:24,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 24127 trivial. 0 not checked. [2021-11-25 20:34:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 24127 trivial. 0 not checked. [2021-11-25 20:34:30,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188632655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:34:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950523096] [2021-11-25 20:34:30,343 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:34:30,343 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:34:30,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:34:30,344 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:34:30,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:34:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,458 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-25 20:34:30,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-25 20:34:30,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,574 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 20:34:30,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-25 20:34:30,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:30,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 20:34:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:34,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:34,590 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 20:34:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 561 treesize of output 527 [2021-11-25 20:34:36,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:36,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:36,565 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:34:36,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:34:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:36,745 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 20:34:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 20:34:36,810 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-25 20:34:36,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2021-11-25 20:34:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:36,984 INFO L354 Elim1Store]: treesize reduction 202, result has 38.4 percent of original size [2021-11-25 20:34:36,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 211 [2021-11-25 20:34:40,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:40,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:40,380 INFO L354 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2021-11-25 20:34:40,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-11-25 20:34:40,679 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2021-11-25 20:34:40,680 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:34:43,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9151#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 20:34:43,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:34:43,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:34:43,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 145 [2021-11-25 20:34:43,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11475134] [2021-11-25 20:34:43,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:34:43,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-25 20:34:43,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-25 20:34:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9685, Invalid=13877, Unknown=0, NotChecked=0, Total=23562 [2021-11-25 20:34:43,284 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 145 states, 145 states have (on average 1.4) internal successors, (203), 145 states have internal predecessors, (203), 48 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 48 states have call predecessors, (144), 48 states have call successors, (144) [2021-11-25 20:34:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:50,861 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2021-11-25 20:34:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-25 20:34:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.4) internal successors, (203), 145 states have internal predecessors, (203), 48 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 48 states have call predecessors, (144), 48 states have call successors, (144) Word has length 558 [2021-11-25 20:34:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:50,871 INFO L225 Difference]: With dead ends: 1087 [2021-11-25 20:34:50,871 INFO L226 Difference]: Without dead ends: 1035 [2021-11-25 20:34:50,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1768 GetRequests, 1522 SyntacticMatches, 47 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27417 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=14480, Invalid=25720, Unknown=0, NotChecked=0, Total=40200 [2021-11-25 20:34:50,885 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2702 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 2723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2840 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2723 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:50,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2840 Valid, 345 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2723 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 20:34:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-11-25 20:34:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2021-11-25 20:34:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2021-11-25 20:34:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2021-11-25 20:34:50,944 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2021-11-25 20:34:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:50,979 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2021-11-25 20:34:50,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.4) internal successors, (203), 145 states have internal predecessors, (203), 48 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 48 states have call predecessors, (144), 48 states have call successors, (144) [2021-11-25 20:34:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2021-11-25 20:34:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2021-11-25 20:34:51,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:51,039 INFO L514 BasicCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:51,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:51,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:34:51,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2021-11-25 20:34:51,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:51,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042829721] [2021-11-25 20:34:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:51,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2021-11-25 20:34:55,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042829721] [2021-11-25 20:34:55,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042829721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255321146] [2021-11-25 20:34:55,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:34:55,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:55,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:55,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:55,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f2c51d-2399-4017-8060-b80c6465cdb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process