./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF --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 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:45,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:45,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:45,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:45,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:45,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:45,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:45,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:45,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:45,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:45,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:45,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:45,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:45,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:45,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:45,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:45,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:45,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:45,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:45,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:45,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:45,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:45,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:45,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:46,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:46,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:46,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:46,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:46,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:46,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:46,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:46,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:46,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:46,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:46,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:46,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:46,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:46,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:46,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:46,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:46,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:46,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:40:46,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:46,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:46,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:46,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:46,064 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:46,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:46,064 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:46,065 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:40:46,071 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:46,071 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:46,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:40:46,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:40:46,072 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:46,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:40:46,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:40:46,073 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:40:46,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:46,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:40:46,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:40:46,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:40:46,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:46,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:46,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:46,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:46,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:46,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:40:46,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:46,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:46,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:46,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:46,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:46,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:46,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:46,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:46,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:46,078 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:40:46,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:40:46,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:46,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:46,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:46,079 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_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2021-11-12 23:40:46,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:46,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:46,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:46,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:46,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:46,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-11-12 23:40:46,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/data/85f38d192/2106cd6ccb2d4a9fac9168606faf37af/FLAG3876f3bf9 [2021-11-12 23:40:47,003 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:47,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-11-12 23:40:47,009 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/data/85f38d192/2106cd6ccb2d4a9fac9168606faf37af/FLAG3876f3bf9 [2021-11-12 23:40:47,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/data/85f38d192/2106cd6ccb2d4a9fac9168606faf37af [2021-11-12 23:40:47,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:47,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:47,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:47,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:47,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:47,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcdbb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47, skipping insertion in model container [2021-11-12 23:40:47,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:47,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:47,575 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2021-11-12 23:40:47,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:47,617 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:40:47,627 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2021-11-12 23:40:47,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:47,643 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:40:47,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47 WrapperNode [2021-11-12 23:40:47,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:47,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:47,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:40:47,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:40:47,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:47,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:40:47,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:40:47,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:40:47,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:40:47,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:40:47,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:40:47,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:40:47,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (1/1) ... [2021-11-12 23:40:47,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:47,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:40:47,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:40:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:40:47,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:40:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:40:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:40:47,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:40:47,982 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:40:47,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:47 BoogieIcfgContainer [2021-11-12 23:40:47,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:40:47,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:40:47,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:40:47,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:40:47,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:47" (1/3) ... [2021-11-12 23:40:47,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ce0004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:47, skipping insertion in model container [2021-11-12 23:40:47,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:47" (2/3) ... [2021-11-12 23:40:47,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ce0004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:47, skipping insertion in model container [2021-11-12 23:40:47,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:47" (3/3) ... [2021-11-12 23:40:47,993 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2021-11-12 23:40:47,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:40:47,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:40:48,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:40:48,050 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 [2021-11-12 23:40:48,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:40:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:40:48,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:48,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:40:48,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2067913, now seen corresponding path program 1 times [2021-11-12 23:40:48,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:48,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765004632] [2021-11-12 23:40:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:48,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:48,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:48,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765004632] [2021-11-12 23:40:48,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765004632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:48,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:48,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:40:48,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656319737] [2021-11-12 23:40:48,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:48,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:48,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:40:48,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:48,335 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-12 23:40:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:48,388 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 23:40:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-12 23:40:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:48,399 INFO L225 Difference]: With dead ends: 13 [2021-11-12 23:40:48,399 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 23:40:48,402 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 [2021-11-12 23:40:48,410 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:48,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 38.10ms Time] [2021-11-12 23:40:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 23:40:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 23:40:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2021-11-12 23:40:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 23:40:48,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 23:40:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:48,444 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 23:40:48,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-12 23:40:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 23:40:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:40:48,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:48,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:40:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:40:48,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash 64062984, now seen corresponding path program 1 times [2021-11-12 23:40:48,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:48,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721653827] [2021-11-12 23:40:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:48,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:48,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:48,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721653827] [2021-11-12 23:40:48,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721653827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:48,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555612343] [2021-11-12 23:40:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:48,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:48,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:48,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:48,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:40:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:40:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:48,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:49,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555612343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:49,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905986175] [2021-11-12 23:40:49,075 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:40:49,075 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:40:49,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:40:49,090 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:40:49,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:40:49,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,147 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:49,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:40:49,152 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:49,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:40:49,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:40:49,190 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 23:40:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:40:49,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:40:49,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:40:49,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:40:49,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:49,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:40:49,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:40:49,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:40:49,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:40:49,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:40:49,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:40:49,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:40:49,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:49,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-12 23:40:49,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:49,458 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.6 percent of original size [2021-11-12 23:40:49,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:40:49,489 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:40:49,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:40:49,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:40:49,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 8 [2021-11-12 23:40:49,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067579024] [2021-11-12 23:40:49,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:40:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:40:49,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:40:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:40:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:49,792 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:49,897 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-11-12 23:40:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:40:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 23:40:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:49,898 INFO L225 Difference]: With dead ends: 14 [2021-11-12 23:40:49,898 INFO L226 Difference]: Without dead ends: 9 [2021-11-12 23:40:49,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:40:49,901 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:49,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 30.61ms Time] [2021-11-12 23:40:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-12 23:40:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-12 23:40:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-12 23:40:49,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-12 23:40:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:49,905 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-12 23:40:49,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:49,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-12 23:40:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:40:49,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:49,906 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-12 23:40:49,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:50,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:50,123 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1492854153, now seen corresponding path program 2 times [2021-11-12 23:40:50,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:50,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517152693] [2021-11-12 23:40:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:50,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:50,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:50,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517152693] [2021-11-12 23:40:50,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517152693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:50,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144508868] [2021-11-12 23:40:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:40:50,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:50,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:50,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:50,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:40:50,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:40:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:40:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:40:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:50,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144508868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:50,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141471943] [2021-11-12 23:40:50,489 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:40:50,489 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:40:50,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:40:50,490 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:40:50,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:40:50,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,504 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:50,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:40:50,507 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:50,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:40:50,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:40:50,523 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 23:40:50,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:40:50,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:40:50,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:40:50,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:40:50,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:50,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:40:50,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:40:50,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:40:50,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:40:50,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:40:50,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:40:50,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:40:50,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:50,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-12 23:40:50,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:50,699 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.6 percent of original size [2021-11-12 23:40:50,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:40:50,721 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:40:50,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:40:50,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:40:50,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-12 23:40:50,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996840588] [2021-11-12 23:40:50,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:40:50,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:40:50,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:40:50,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:40:50,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:40:50,983 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:51,376 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-12 23:40:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:40:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:40:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:51,377 INFO L225 Difference]: With dead ends: 18 [2021-11-12 23:40:51,377 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 23:40:51,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:40:51,379 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:51,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 58 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 65.93ms Time] [2021-11-12 23:40:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 23:40:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 23:40:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-11-12 23:40:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 23:40:51,383 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 23:40:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:51,384 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 23:40:51,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 23:40:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:40:51,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:51,385 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-12 23:40:51,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:51,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:51,599 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1997667031, now seen corresponding path program 3 times [2021-11-12 23:40:51,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:51,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136020934] [2021-11-12 23:40:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:51,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:51,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:40:51,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136020934] [2021-11-12 23:40:51,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136020934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:51,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465514868] [2021-11-12 23:40:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:40:51,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:51,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:51,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:51,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:40:51,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:40:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:40:51,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-12 23:40:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:52,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:53,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465514868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:53,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839773751] [2021-11-12 23:40:53,539 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:40:53,539 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:40:53,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:40:53,542 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:40:53,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:40:53,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:53,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:40:53,556 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:53,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:40:53,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:40:53,583 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-12 23:40:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:40:53,594 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:40:53,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:40:53,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:40:53,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:40:53,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:40:53,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:40:53,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:40:53,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:40:53,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:40:53,634 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:40:53,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:40:53,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,701 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:40:53,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:40:53,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-12 23:40:53,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 485 [2021-11-12 23:40:53,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:40:53,817 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.6 percent of original size [2021-11-12 23:40:53,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:40:53,827 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:40:54,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:40:54,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:40:54,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 35 [2021-11-12 23:40:54,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100205725] [2021-11-12 23:40:54,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:40:54,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 23:40:54,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:40:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 23:40:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 23:40:54,261 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-11-12 23:41:10,259 WARN L227 SmtUtils]: Spent 14.85s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:41:20,437 WARN L227 SmtUtils]: Spent 8.46s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:41:37,211 WARN L227 SmtUtils]: Spent 15.63s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:42:04,623 WARN L227 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:42:11,632 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:42:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:23,949 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-12 23:42:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 23:42:23,951 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 23:42:23,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:23,951 INFO L225 Difference]: With dead ends: 35 [2021-11-12 23:42:23,952 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:42:23,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 83.8s TimeCoverageRelationStatistics Valid=841, Invalid=2129, Unknown=0, NotChecked=0, Total=2970 [2021-11-12 23:42:23,954 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7042.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7102.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:23,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 278 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [77 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 7102.34ms Time] [2021-11-12 23:42:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:42:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-12 23:42:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-12 23:42:23,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-12 23:42:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:23,973 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-12 23:42:23,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-11-12 23:42:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-12 23:42:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 23:42:23,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:23,975 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-12 23:42:24,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-12 23:42:24,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:24,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash 576920681, now seen corresponding path program 4 times [2021-11-12 23:42:24,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:24,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162884498] [2021-11-12 23:42:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:24,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:24,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:24,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162884498] [2021-11-12 23:42:24,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162884498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155079250] [2021-11-12 23:42:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:42:24,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:24,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:24,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9bed7e5-348b-41f7-835f-8b8e803d4d56/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:42:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:29,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-12 23:42:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:30,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:22,274 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 162 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:44:18,139 WARN L227 SmtUtils]: Spent 11.33s on a formula simplification that was a NOOP. DAG size: 203 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:45:07,428 WARN L227 SmtUtils]: Spent 9.91s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:45:55,877 WARN L227 SmtUtils]: Spent 14.52s on a formula simplification that was a NOOP. DAG size: 229 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:46:21,305 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse17 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296))) (or (let ((.cse4 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| 4294967295))) (let ((.cse16 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse0 (< .cse17 500000)) (.cse12 (and (not (= 0 (mod (+ .cse1 4294967284) (- 4294967296)))) (not (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0)))) (.cse2 (<= 500000 .cse17)) (.cse15 (<= 500000 .cse4))) (and (or (and (or .cse0 (and (not (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967284) 4294967296) 0)) (not (= (mod (+ .cse1 10) (- 4294967296)) 0)))) (or .cse2 (let ((.cse3 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (and (or (< .cse3 500000) (and (not (= (mod (+ 4294967286 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)) (not (= (mod (+ .cse1 8) (- 4294967296)) 0)))) (or (and (or (and (not (= (mod (+ 4294967288 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)) (not (= 0 (mod (+ .cse1 6) (- 4294967296))))) (< .cse4 500000)) (or (let ((.cse5 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296))) (and (or (< .cse5 500000) (and (not (= (mod (+ .cse1 4) (- 4294967296)) 0)) (not (= (mod (+ 4294967290 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)))) (or (let ((.cse6 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (and (or (< .cse6 500000) (and (not (= (mod (+ 4294967292 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)) (not (= (mod (+ 2 .cse1) (- 4294967296)) 0)))) (or (let ((.cse7 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (and (or (<= 500000 .cse7) (let ((.cse14 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (and (or (let ((.cse13 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296))) (and (or (let ((.cse8 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (and (or (< .cse8 500000) (and (not (= (mod (+ 4294967290 .cse1) (- 4294967296)) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0)))) (or (<= 500000 .cse8) (let ((.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296))) (and (or (< .cse9 500000) (and (not (= (mod (+ 4294967288 .cse1) (- 4294967296)) 0)) (not (= 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))))) (or (let ((.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296))) (and (or (and (not (= (mod (+ .cse1 4294967286) (- 4294967296)) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0))) (< .cse10 500000)) (or (and (or (< .cse11 500000) .cse12) (or (<= 500000 .cse11) (and (not (= (mod (+ 4294967282 .cse1) (- 4294967296)) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0))))) (<= 500000 .cse10)))) (<= 500000 .cse9))))))) (<= 500000 .cse13)) (or (< .cse13 500000) (and (not (= (mod (+ 4294967292 .cse1) (- 4294967296)) 0)) (not (= (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)))))) (<= 500000 .cse14)) (or (< .cse14 500000) (and (not (= (mod (+ .cse1 4294967294) (- 4294967296)) 0)) (not (= (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0))))))) (or (< .cse7 500000) (and (not (= (mod (+ 4294967294 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)) (not (= (mod .cse1 (- 4294967296)) 0)))))) (<= 500000 .cse6)))) (<= 500000 .cse5)))) .cse15)) (<= 500000 .cse3)))))) (<= 500000 .cse16)) (or (< .cse16 500000) (and (or (and (not (= (mod (+ 4294967282 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 0)) (not (= (mod (+ .cse1 12) (- 4294967296)) 0))) .cse0) (or .cse12 .cse2 .cse15)))))) (<= 1000000 .cse11) (<= 1000000 .cse17))) is different from false [2021-11-12 23:47:34,497 WARN L227 SmtUtils]: Spent 27.86s on a formula simplification that was a NOOP. DAG size: 264 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:49:00,511 WARN L227 SmtUtils]: Spent 29.43s on a formula simplification that was a NOOP. DAG size: 280 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:50:40,978 WARN L227 SmtUtils]: Spent 36.47s on a formula simplification that was a NOOP. DAG size: 299 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:54:02,585 WARN L227 SmtUtils]: Spent 1.52m on a formula simplification. DAG size of input: 318 DAG size of output: 318 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)