./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG --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 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:11:33,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:11:33,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:11:33,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:11:33,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:11:33,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:11:33,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:11:33,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:11:33,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:11:33,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:11:33,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:11:33,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:11:33,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:11:33,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:11:33,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:11:33,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:11:33,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:11:33,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:11:33,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:11:33,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:11:33,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:11:33,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:11:33,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:11:33,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:11:33,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:11:33,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:11:33,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:11:33,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:11:33,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:11:33,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:11:33,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:11:33,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:11:33,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:11:33,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:11:33,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:11:33,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:11:33,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:11:33,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:11:33,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:11:33,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:11:33,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:11:34,001 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:11:34,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:11:34,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:11:34,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:11:34,060 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:11:34,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:11:34,061 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:11:34,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:11:34,062 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:11:34,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:11:34,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:11:34,071 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:11:34,072 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:11:34,072 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:11:34,072 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:11:34,072 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:11:34,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:11:34,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:11:34,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:11:34,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:11:34,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:11:34,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:11:34,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:11:34,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:11:34,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:11:34,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:11:34,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:11:34,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:11:34,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:11:34,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:11:34,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:11:34,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:11:34,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:11:34,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:11:34,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:11:34,081 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:11:34,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:11:34,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:11:34,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:11:34,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:11:34,082 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_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2021-10-29 05:11:34,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:11:34,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:11:34,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:11:34,472 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:11:34,473 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:11:34,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-10-29 05:11:34,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/data/ffaeddc0d/a680ad9ef9394a39bd22856879ec22f4/FLAG6fcfea377 [2021-10-29 05:11:35,224 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:11:35,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-10-29 05:11:35,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/data/ffaeddc0d/a680ad9ef9394a39bd22856879ec22f4/FLAG6fcfea377 [2021-10-29 05:11:35,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/data/ffaeddc0d/a680ad9ef9394a39bd22856879ec22f4 [2021-10-29 05:11:35,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:11:35,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:11:35,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:11:35,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:11:35,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:11:35,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de3be2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35, skipping insertion in model container [2021-10-29 05:11:35,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:11:35,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:11:35,833 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_81a94920-9671-4543-a600-be37fdf7de4a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-10-29 05:11:35,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:11:35,863 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:11:35,880 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_81a94920-9671-4543-a600-be37fdf7de4a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-10-29 05:11:35,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:11:35,910 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:11:35,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35 WrapperNode [2021-10-29 05:11:35,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:11:35,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:11:35,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:11:35,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:11:35,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:11:35,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:11:35,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:11:35,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:11:35,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:35,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:11:35,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:11:35,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:11:35,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:11:35,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (1/1) ... [2021-10-29 05:11:36,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:11:36,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:11:36,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:11:36,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:11:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:11:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:11:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:11:36,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:11:36,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:11:36,435 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-29 05:11:36,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:11:36 BoogieIcfgContainer [2021-10-29 05:11:36,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:11:36,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:11:36,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:11:36,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:11:36,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:11:35" (1/3) ... [2021-10-29 05:11:36,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678d69d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:11:36, skipping insertion in model container [2021-10-29 05:11:36,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:11:35" (2/3) ... [2021-10-29 05:11:36,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678d69d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:11:36, skipping insertion in model container [2021-10-29 05:11:36,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:11:36" (3/3) ... [2021-10-29 05:11:36,450 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-10-29 05:11:36,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:11:36,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-29 05:11:36,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:11:36,523 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 [2021-10-29 05:11:36,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-29 05:11:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:11:36,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:11:36,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:11:36,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:11:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:11:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2021-10-29 05:11:36,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:11:36,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481150994] [2021-10-29 05:11:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:11:36,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:11:36,712 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:11:36,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462143353] [2021-10-29 05:11:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:11:36,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:11:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:11:36,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:11:36,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:11:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:11:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:11:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:11:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:11:37,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:11:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:11:39,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:11:39,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481150994] [2021-10-29 05:11:39,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:11:39,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462143353] [2021-10-29 05:11:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462143353] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:11:39,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:11:39,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:11:39,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317670831] [2021-10-29 05:11:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:11:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:11:39,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:11:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-10-29 05:11:39,520 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:11:39,981 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-10-29 05:11:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:11:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:11:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:11:39,993 INFO L225 Difference]: With dead ends: 40 [2021-10-29 05:11:39,993 INFO L226 Difference]: Without dead ends: 13 [2021-10-29 05:11:39,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-29 05:11:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-29 05:11:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-29 05:11:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-29 05:11:40,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-10-29 05:11:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:11:40,050 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-29 05:11:40,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-29 05:11:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:11:40,051 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:11:40,052 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:11:40,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-29 05:11:40,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-29 05:11:40,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:11:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:11:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2021-10-29 05:11:40,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:11:40,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115876737] [2021-10-29 05:11:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:11:40,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:11:40,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:11:40,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296423771] [2021-10-29 05:11:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:11:40,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:11:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:11:40,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:11:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:11:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:11:40,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:11:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:11:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:11:40,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:11:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:11:40,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:11:40,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115876737] [2021-10-29 05:11:40,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:11:40,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296423771] [2021-10-29 05:11:40,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296423771] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:11:40,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424763250] [2021-10-29 05:11:40,556 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:11:40,557 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:11:40,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:11:40,569 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:11:40,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:11:40,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,619 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:11:40,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:11:40,626 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:11:40,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:11:40,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:11:40,669 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-29 05:11:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,701 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 [2021-10-29 05:11:40,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:11:40,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:11:40,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:11:40,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:40,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:11:40,812 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 [2021-10-29 05:11:40,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:11:40,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:11:40,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:11:40,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:40,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:11:40,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:11:40,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-29 05:11:40,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-29 05:11:40,928 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-29 05:11:40,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:11:40,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,964 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-10-29 05:11:40,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:40,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-29 05:11:40,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,231 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:11:41,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-29 05:11:41,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-10-29 05:11:41,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 446 [2021-10-29 05:11:41,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 451 [2021-10-29 05:11:41,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,681 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:11:41,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:11:41,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,712 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:11:41,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:11:41,739 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-10-29 05:11:41,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-29 05:11:41,758 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:11:41,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:11:41,779 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:11:41,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:11:41,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:11:41,871 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:11:42,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:11:42,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:11:42,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-29 05:11:42,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181022114] [2021-10-29 05:11:42,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:11:42,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:11:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:11:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:11:42,782 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:11:42,878 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-29 05:11:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:11:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:11:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:11:42,880 INFO L225 Difference]: With dead ends: 35 [2021-10-29 05:11:42,880 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 05:11:42,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-29 05:11:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 05:11:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-29 05:11:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-29 05:11:42,888 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 10 [2021-10-29 05:11:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:11:42,889 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-29 05:11:42,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:11:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-29 05:11:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 05:11:42,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:11:42,890 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-29 05:11:42,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:11:43,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:11:43,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:11:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:11:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1019667251, now seen corresponding path program 1 times [2021-10-29 05:11:43,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:11:43,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987862763] [2021-10-29 05:11:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:11:43,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:11:43,141 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:11:43,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531008597] [2021-10-29 05:11:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:11:43,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:11:43,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:11:43,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:11:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:11:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:11:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-29 05:11:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:11:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:11:43,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:12:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:12:04,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:12:04,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987862763] [2021-10-29 05:12:04,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:12:04,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531008597] [2021-10-29 05:12:04,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531008597] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:12:04,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640600828] [2021-10-29 05:12:04,326 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:12:04,327 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:12:04,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:12:04,327 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:12:04,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:12:04,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,338 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:12:04,339 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:12:04,341 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:12:04,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:12:04,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:12:04,351 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-10-29 05:12:04,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,367 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 [2021-10-29 05:12:04,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:12:04,370 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:12:04,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:12:04,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:04,407 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 [2021-10-29 05:12:04,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:12:04,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:12:04,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:12:04,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:12:04,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:12:04,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-29 05:12:04,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-29 05:12:04,443 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-29 05:12:04,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:12:04,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,464 INFO L185 QuantifierPusher]: treesize reduction 14, result has 91.4 percent of original size 149 [2021-10-29 05:12:04,472 INFO L180 QuantifierPusher]: treesize reduction 14, result has 91.9 percent of original size [2021-10-29 05:12:04,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-10-29 05:12:04,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,530 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:12:04,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:12:04,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:12:04,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:12:04,562 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:12:04,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:12:04,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-29 05:12:04,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:04,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:12:04,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:04,649 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:12:05,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:12:05,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:12:05,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-29 05:12:05,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67500982] [2021-10-29 05:12:05,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-29 05:12:05,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:12:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-29 05:12:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-29 05:12:05,945 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:12:27,344 WARN L207 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 50 [2021-10-29 05:12:51,688 WARN L207 SmtUtils]: Spent 8.22 s on a formula simplification that was a NOOP. DAG size: 51 [2021-10-29 05:12:53,701 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (and (or (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse0) (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)) (let ((.cse1 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse2 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse3 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse1 .cse2 .cse3) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (div (+ .cse1 .cse2 (- 4) .cse3) (- 4))))))) is different from false [2021-10-29 05:12:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:12:53,854 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-10-29 05:12:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-29 05:12:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-29 05:12:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:12:53,856 INFO L225 Difference]: With dead ends: 31 [2021-10-29 05:12:53,856 INFO L226 Difference]: Without dead ends: 25 [2021-10-29 05:12:53,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=159, Invalid=589, Unknown=12, NotChecked=52, Total=812 [2021-10-29 05:12:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-29 05:12:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-29 05:12:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:12:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-29 05:12:53,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2021-10-29 05:12:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:12:53,868 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-29 05:12:53,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:12:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-29 05:12:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 05:12:53,869 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:12:53,869 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-29 05:12:53,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:12:54,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:12:54,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:12:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:12:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1641908438, now seen corresponding path program 2 times [2021-10-29 05:12:54,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:12:54,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635580922] [2021-10-29 05:12:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:12:54,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:12:54,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:12:54,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718288321] [2021-10-29 05:12:54,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:12:54,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:12:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:12:54,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:12:54,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:12:54,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 05:12:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:12:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 05:12:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:12:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:12:54,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:12:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:12:54,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:12:54,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635580922] [2021-10-29 05:12:54,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:12:54,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718288321] [2021-10-29 05:12:54,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718288321] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:12:54,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099220690] [2021-10-29 05:12:54,497 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:12:54,497 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:12:54,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:12:54,498 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:12:54,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:12:54,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,507 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:12:54,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:12:54,509 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:12:54,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:12:54,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:12:54,516 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-10-29 05:12:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,529 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 [2021-10-29 05:12:54,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:12:54,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:12:54,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:12:54,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:12:54,567 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 [2021-10-29 05:12:54,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:12:54,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:12:54,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:12:54,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:12:54,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:12:54,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-29 05:12:54,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-29 05:12:54,627 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-29 05:12:54,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:12:54,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,650 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.3 percent of original size 122 [2021-10-29 05:12:54,656 INFO L180 QuantifierPusher]: treesize reduction 6, result has 95.6 percent of original size [2021-10-29 05:12:54,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-29 05:12:54,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,756 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:12:54,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-10-29 05:12:54,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 347 [2021-10-29 05:12:54,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 435 [2021-10-29 05:12:54,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,834 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 440 [2021-10-29 05:12:54,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:54,935 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:12:54,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:12:54,943 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:12:54,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:54,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:12:54,966 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-10-29 05:12:54,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-29 05:12:54,979 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:12:54,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:12:54,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:12:55,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:12:55,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:12:55,059 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:12:55,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:12:55,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:12:55,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-29 05:12:55,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975967648] [2021-10-29 05:12:55,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-29 05:12:55,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:12:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-29 05:12:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-29 05:12:55,872 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:12:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:12:56,113 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-10-29 05:12:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 05:12:56,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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 22 [2021-10-29 05:12:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:12:56,115 INFO L225 Difference]: With dead ends: 71 [2021-10-29 05:12:56,115 INFO L226 Difference]: Without dead ends: 67 [2021-10-29 05:12:56,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-10-29 05:12:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-29 05:12:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-10-29 05:12:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:12:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-10-29 05:12:56,148 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 22 [2021-10-29 05:12:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:12:56,148 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-10-29 05:12:56,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:12:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-10-29 05:12:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 05:12:56,150 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:12:56,151 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1] [2021-10-29 05:12:56,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:12:56,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-29 05:12:56,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:12:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:12:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1667839023, now seen corresponding path program 2 times [2021-10-29 05:12:56,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:12:56,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93691229] [2021-10-29 05:12:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:12:56,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:12:56,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:12:56,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524340651] [2021-10-29 05:12:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:12:56,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:12:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:12:56,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:12:56,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:12:56,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 05:12:56,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:12:56,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-29 05:12:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:12:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:12:57,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:13:32,386 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (- 4)) 0))) is different from false [2021-10-29 05:13:38,487 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 2) ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 1)) (= (+ (* 4 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 4) (+ (* 2 ULTIMATE.start_main_~k~0) (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))))) (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 1))) (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-10-29 05:13:48,681 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 2))) (+ (* (- 6) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0))) (- 4)) 0)) (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 3) ULTIMATE.start_main_~k~0) (= (+ (* 3 ULTIMATE.start_main_~k~0) (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0)) (+ 9 (* 6 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 2))))) is different from false [2021-10-29 05:13:58,858 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 3))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0))) (- 4)) 0)) (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 4) ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 3)) (= (+ 16 (* 8 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (+ (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0) (* 4 ULTIMATE.start_main_~k~0)))))) is different from false [2021-10-29 05:14:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 38 not checked. [2021-10-29 05:14:04,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:14:04,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93691229] [2021-10-29 05:14:04,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:14:04,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524340651] [2021-10-29 05:14:04,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524340651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:14:04,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55746631] [2021-10-29 05:14:04,993 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:14:04,993 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:14:04,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:14:04,994 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:14:04,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:14:05,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,003 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:05,003 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:14:05,004 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:05,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:14:05,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:14:05,015 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-10-29 05:14:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,028 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 [2021-10-29 05:14:05,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:14:05,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:14:05,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:14:05,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:05,062 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 [2021-10-29 05:14:05,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:14:05,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:14:05,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:14:05,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,076 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:14:05,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:14:05,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-29 05:14:05,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-29 05:14:05,101 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-29 05:14:05,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-10-29 05:14:05,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-29 05:14:05,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-10-29 05:14:05,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-10-29 05:14:05,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-10-29 05:14:05,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-10-29 05:14:05,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,249 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:14:05,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:14:05,254 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:14:05,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:14:05,269 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:14:05,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:14:05,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-29 05:14:05,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:05,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:14:05,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:05,346 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:14:06,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:14:06,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:14:06,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-29 05:14:06,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645549811] [2021-10-29 05:14:06,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-29 05:14:06,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:14:06,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-29 05:14:06,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=557, Unknown=4, NotChecked=204, Total=870 [2021-10-29 05:14:06,568 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:12,245 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse1 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (and (<= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) (or (not (= (+ (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) .cse0 (* 2 .cse1)) (* 4 c_ULTIMATE.start_main_~x~0))) (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse0) (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)) (let ((.cse2 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse3 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse4 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse2 .cse3 .cse4) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse0) .cse1 1) (div (+ .cse2 .cse3 (- 4) .cse4) (- 4))))))) is different from false [2021-10-29 05:14:14,390 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse0 (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond))) (and (let ((.cse1 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse2 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse3 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or .cse0 (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse1 .cse2 .cse3) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse4) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (div (+ .cse1 .cse2 (- 4) .cse3) (- 4))))) (or (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse4) .cse0 (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)))) is different from false [2021-10-29 05:14:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:14:14,394 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-29 05:14:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-29 05:14:14,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 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 24 [2021-10-29 05:14:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:14:14,397 INFO L225 Difference]: With dead ends: 53 [2021-10-29 05:14:14,398 INFO L226 Difference]: Without dead ends: 47 [2021-10-29 05:14:14,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=221, Invalid=1057, Unknown=6, NotChecked=438, Total=1722 [2021-10-29 05:14:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-29 05:14:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-29 05:14:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-10-29 05:14:14,412 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 24 [2021-10-29 05:14:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:14:14,412 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-10-29 05:14:14,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-10-29 05:14:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 05:14:14,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:14:14,415 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1] [2021-10-29 05:14:14,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:14:14,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-10-29 05:14:14,634 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:14:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:14:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1569497815, now seen corresponding path program 3 times [2021-10-29 05:14:14,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:14:14,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915090839] [2021-10-29 05:14:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:14:14,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:14:14,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:14:14,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565500067] [2021-10-29 05:14:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 05:14:14,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:14:14,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:14:14,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:14:14,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 05:14:15,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 05:14:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:14:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-29 05:14:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:14:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:14:15,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:14:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:14:16,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:14:16,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915090839] [2021-10-29 05:14:16,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:14:16,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565500067] [2021-10-29 05:14:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565500067] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:14:16,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130676770] [2021-10-29 05:14:16,640 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:14:16,640 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:14:16,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:14:16,641 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:14:16,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:14:16,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,663 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:16,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:14:16,665 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:16,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:14:16,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:14:16,671 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-10-29 05:14:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,687 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 [2021-10-29 05:14:16,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:14:16,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:14:16,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:14:16,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:16,720 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 [2021-10-29 05:14:16,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:14:16,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:14:16,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:14:16,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:14:16,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:14:16,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-29 05:14:16,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-29 05:14:16,749 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-29 05:14:16,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-10-29 05:14:16,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-29 05:14:16,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:14:16,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,866 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:16,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-29 05:14:16,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-10-29 05:14:16,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 446 [2021-10-29 05:14:16,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:16,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 451 [2021-10-29 05:14:16,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:16,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,003 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:14:17,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:14:17,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:17,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:14:17,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:17,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:14:17,023 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:14:17,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:14:17,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:17,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-29 05:14:17,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:17,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:14:17,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:17,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:14:18,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:14:18,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:14:18,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-29 05:14:18,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082003599] [2021-10-29 05:14:18,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-29 05:14:18,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:14:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-29 05:14:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-10-29 05:14:18,232 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:14:20,530 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-10-29 05:14:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-29 05:14:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 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 32 [2021-10-29 05:14:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:14:20,532 INFO L225 Difference]: With dead ends: 53 [2021-10-29 05:14:20,532 INFO L226 Difference]: Without dead ends: 47 [2021-10-29 05:14:20,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-10-29 05:14:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-29 05:14:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-29 05:14:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-29 05:14:20,544 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 32 [2021-10-29 05:14:20,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:14:20,545 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-29 05:14:20,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-29 05:14:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-29 05:14:20,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:14:20,547 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-10-29 05:14:20,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:14:20,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-10-29 05:14:20,758 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:14:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:14:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1490352846, now seen corresponding path program 3 times [2021-10-29 05:14:20,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:14:20,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404683107] [2021-10-29 05:14:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:14:20,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:14:20,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:14:20,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476031379] [2021-10-29 05:14:20,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 05:14:20,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:14:20,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:14:20,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:14:20,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 05:14:21,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 05:14:21,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:14:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 05:14:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:14:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:14:21,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:14:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:14:21,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:14:21,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404683107] [2021-10-29 05:14:21,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:14:21,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476031379] [2021-10-29 05:14:21,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476031379] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:14:21,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894184384] [2021-10-29 05:14:21,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:14:21,744 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:14:21,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:14:21,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:14:21,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:14:21,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,758 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:21,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:14:21,761 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:21,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:14:21,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-29 05:14:21,770 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-10-29 05:14:21,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,783 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 [2021-10-29 05:14:21,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:14:21,785 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:14:21,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:14:21,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:21,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:14:21,822 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 [2021-10-29 05:14:21,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:14:21,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:14:21,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:14:21,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:21,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:14:21,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:14:21,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-10-29 05:14:21,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-29 05:14:21,850 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-10-29 05:14:21,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-10-29 05:14:21,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,861 INFO L185 QuantifierPusher]: treesize reduction 8, result has 93.8 percent of original size 122 [2021-10-29 05:14:21,865 INFO L180 QuantifierPusher]: treesize reduction 8, result has 94.2 percent of original size [2021-10-29 05:14:21,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-29 05:14:21,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:21,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:21,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:21,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,931 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:14:21,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-10-29 05:14:21,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 351 [2021-10-29 05:14:21,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 439 [2021-10-29 05:14:21,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:21,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 444 [2021-10-29 05:14:22,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,091 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:14:22,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:14:22,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:22,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:14:22,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:22,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:14:22,112 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-10-29 05:14:22,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-29 05:14:22,122 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-10-29 05:14:22,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 05:14:22,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:14:22,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:14:22,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:14:22,176 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:14:23,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:14:23,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:14:23,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-29 05:14:23,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712327867] [2021-10-29 05:14:23,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-29 05:14:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:14:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-29 05:14:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2021-10-29 05:14:23,013 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:14:23,458 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-29 05:14:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-29 05:14:23,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 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 46 [2021-10-29 05:14:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:14:23,461 INFO L225 Difference]: With dead ends: 91 [2021-10-29 05:14:23,461 INFO L226 Difference]: Without dead ends: 87 [2021-10-29 05:14:23,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=686, Invalid=1764, Unknown=0, NotChecked=0, Total=2450 [2021-10-29 05:14:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-29 05:14:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-29 05:14:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-10-29 05:14:23,488 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 46 [2021-10-29 05:14:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:14:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-10-29 05:14:23,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:14:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-10-29 05:14:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-29 05:14:23,493 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:14:23,493 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2021-10-29 05:14:23,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:14:23,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-10-29 05:14:23,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:14:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:14:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1024659946, now seen corresponding path program 4 times [2021-10-29 05:14:23,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:14:23,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315410912] [2021-10-29 05:14:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:14:23,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:14:23,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:14:23,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099515910] [2021-10-29 05:14:23,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-29 05:14:23,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:14:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:14:23,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:14:23,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-29 05:14:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:14:25,342 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:14:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:14:25,911 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:14:25,911 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:14:25,913 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:14:25,915 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:14:25,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:14:25,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:14:26,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-10-29 05:14:26,130 INFO L731 BasicCegarLoop]: Path program histogram: [4, 3, 1] [2021-10-29 05:14:26,135 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:14:26,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:14:26 BoogieIcfgContainer [2021-10-29 05:14:26,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:14:26,237 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:14:26,237 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:14:26,237 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:14:26,238 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:11:36" (3/4) ... [2021-10-29 05:14:26,240 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:14:26,375 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:14:26,375 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:14:26,376 INFO L168 Benchmark]: Toolchain (without parser) took 170810.51 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 69.4 MB in the beginning and 37.5 MB in the end (delta: 31.9 MB). Peak memory consumption was 55.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,377 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory is still 85.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:14:26,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.94 ms. Allocated memory is still 109.1 MB. Free memory was 69.2 MB in the beginning and 83.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.14 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,378 INFO L168 Benchmark]: Boogie Preprocessor took 27.61 ms. Allocated memory is still 109.1 MB. Free memory was 82.3 MB in the beginning and 81.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,379 INFO L168 Benchmark]: RCFGBuilder took 454.34 ms. Allocated memory is still 109.1 MB. Free memory was 81.1 MB in the beginning and 70.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,379 INFO L168 Benchmark]: TraceAbstraction took 169795.41 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 70.2 MB in the beginning and 43.8 MB in the end (delta: 26.4 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,379 INFO L168 Benchmark]: Witness Printer took 138.53 ms. Allocated memory is still 132.1 MB. Free memory was 43.8 MB in the beginning and 37.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:14:26,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory is still 85.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.94 ms. Allocated memory is still 109.1 MB. Free memory was 69.2 MB in the beginning and 83.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.14 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.61 ms. Allocated memory is still 109.1 MB. Free memory was 82.3 MB in the beginning and 81.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 454.34 ms. Allocated memory is still 109.1 MB. Free memory was 81.1 MB in the beginning and 70.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 169795.41 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 70.2 MB in the beginning and 43.8 MB in the end (delta: 26.4 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. * Witness Printer took 138.53 ms. Allocated memory is still 132.1 MB. Free memory was 43.8 MB in the beginning and 37.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=11] [L27] EXPR counter++ VAL [counter=12] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=12] [L27] EXPR counter++ VAL [counter=13] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=13] [L27] EXPR counter++ VAL [counter=14] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=14] [L27] EXPR counter++ VAL [counter=15] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=15] [L27] EXPR counter++ VAL [counter=16] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=16] [L27] EXPR counter++ VAL [counter=17] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=17] [L27] EXPR counter++ VAL [counter=18] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=18] [L27] EXPR counter++ VAL [counter=19] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=19] [L27] EXPR counter++ VAL [counter=20] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=20] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=20] [L27] EXPR counter++ VAL [counter=21] [L27] COND FALSE !(counter++<20) [L10] COND TRUE !(cond) VAL [counter=21] [L12] reach_error() VAL [counter=21] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 169.6s, OverallIterations: 8, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 59.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 229 SDslu, 392 SDs, 0 SdLazy, 486 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 500 GetRequests, 295 SyntacticMatches, 6 SemanticMatches, 199 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 114.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 94.8s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 288 ConstructedInterpolants, 44 QuantifiedInterpolants, 3385 SizeOfPredicates, 42 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 0/724 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:14:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a94920-9671-4543-a600-be37fdf7de4a/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...