./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.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_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/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_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/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_80990836-9abb-42d9-94d4-5973b1062c01/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 402079e1c7de243c4e41f5ffecd6596c904161a3f8e591ee220484899b186d55 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:51:22,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:51:22,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:51:22,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:51:22,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:51:22,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:51:22,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:51:22,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:51:22,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:51:22,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:51:22,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:51:22,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:51:22,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:51:22,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:51:22,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:51:22,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:51:22,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:51:22,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:51:22,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:51:22,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:51:22,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:51:22,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:51:22,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:51:22,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:51:22,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:51:22,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:51:22,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:51:22,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:51:22,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:51:22,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:51:22,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:51:22,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:51:22,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:51:22,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:51:22,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:51:22,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:51:22,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:51:22,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:51:22,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:51:22,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:51:22,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:51:22,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:51:22,381 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:51:22,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:51:22,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:51:22,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:51:22,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:51:22,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:51:22,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:51:22,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:51:22,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:51:22,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:51:22,392 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:51:22,393 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:51:22,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:51:22,393 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:51:22,393 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:51:22,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:51:22,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:51:22,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:51:22,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:51:22,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:51:22,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:51:22,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:51:22,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:51:22,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:51:22,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:51:22,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:51:22,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:51:22,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:51:22,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:51:22,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:51:22,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:51:22,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:51:22,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:51:22,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:51:22,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:51:22,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:51:22,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:51:22,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:51:22,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:51:22,401 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_80990836-9abb-42d9-94d4-5973b1062c01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402079e1c7de243c4e41f5ffecd6596c904161a3f8e591ee220484899b186d55 [2021-10-29 05:51:22,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:51:22,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:51:22,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:51:22,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:51:22,657 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:51:22,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-10-29 05:51:22,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/data/177f6b2ae/79fb1913c37a444e8777ffd0761e587b/FLAGd2e12ebcb [2021-10-29 05:51:23,260 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:51:23,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-10-29 05:51:23,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/data/177f6b2ae/79fb1913c37a444e8777ffd0761e587b/FLAGd2e12ebcb [2021-10-29 05:51:23,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/data/177f6b2ae/79fb1913c37a444e8777ffd0761e587b [2021-10-29 05:51:23,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:51:23,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:51:23,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:51:23,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:51:23,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:51:23,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a51ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23, skipping insertion in model container [2021-10-29 05:51:23,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:51:23,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:51:23,839 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_80990836-9abb-42d9-94d4-5973b1062c01/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2021-10-29 05:51:23,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:51:23,877 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:51:23,893 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_80990836-9abb-42d9-94d4-5973b1062c01/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2021-10-29 05:51:23,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:51:23,939 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:51:23,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23 WrapperNode [2021-10-29 05:51:23,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:51:23,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:51:23,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:51:23,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:51:23,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:51:23,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:51:23,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:51:23,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:51:23,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:23,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:24,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:24,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:24,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:51:24,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:51:24,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:51:24,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:51:24,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (1/1) ... [2021-10-29 05:51:24,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:51:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:24,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:51:24,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:51:24,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:51:24,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:51:24,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:51:24,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:51:24,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:51:24,456 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-29 05:51:24,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:51:24 BoogieIcfgContainer [2021-10-29 05:51:24,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:51:24,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:51:24,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:51:24,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:51:24,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:51:23" (1/3) ... [2021-10-29 05:51:24,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2664aa80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:51:24, skipping insertion in model container [2021-10-29 05:51:24,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:51:23" (2/3) ... [2021-10-29 05:51:24,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2664aa80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:51:24, skipping insertion in model container [2021-10-29 05:51:24,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:51:24" (3/3) ... [2021-10-29 05:51:24,468 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound2.c [2021-10-29 05:51:24,474 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:51:24,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-29 05:51:24,541 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:51:24,554 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 05:51:24,556 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-29 05:51:24,574 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 05:51:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:51:24,583 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:24,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:51:24,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:51:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2021-10-29 05:51:24,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:24,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978679895] [2021-10-29 05:51:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:24,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:51:24,754 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 05:51:24,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:51:24,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978679895] [2021-10-29 05:51:24,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978679895] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:51:24,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:51:24,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:51:24,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005257470] [2021-10-29 05:51:24,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:51:24,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:51:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:51:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:51:24,781 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 05:51:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:51:24,796 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-29 05:51:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:51:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 05:51:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:51:24,806 INFO L225 Difference]: With dead ends: 33 [2021-10-29 05:51:24,806 INFO L226 Difference]: Without dead ends: 15 [2021-10-29 05:51:24,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:51:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-29 05:51:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-29 05:51:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:51:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-29 05:51:24,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-29 05:51:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:51:24,840 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-29 05:51:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 05:51:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-29 05:51:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:51:24,841 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:24,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:51:24,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:51:24,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:51:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2021-10-29 05:51:24,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:24,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828276373] [2021-10-29 05:51:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:24,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:24,882 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:51:24,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618942355] [2021-10-29 05:51:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:24,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:24,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:24,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:51:24,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:51:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:51:24,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:51:24,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:51:25,205 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 05:51:25,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:51:27,340 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 05:51:27,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:51:27,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828276373] [2021-10-29 05:51:27,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:27,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618942355] [2021-10-29 05:51:27,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618942355] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:51:27,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:51:27,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:51:27,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118003065] [2021-10-29 05:51:27,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:51:27,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:51:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:51:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-10-29 05:51:27,345 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. 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 05:51:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:51:29,711 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-29 05:51:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:51:29,717 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 05:51:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:51:29,718 INFO L225 Difference]: With dead ends: 43 [2021-10-29 05:51:29,718 INFO L226 Difference]: Without dead ends: 32 [2021-10-29 05:51:29,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-29 05:51:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-29 05:51:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-10-29 05:51:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 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 05:51:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-29 05:51:29,730 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2021-10-29 05:51:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:51:29,731 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-29 05:51:29,732 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 05:51:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-29 05:51:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 05:51:29,734 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:29,734 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:51:29,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:51:29,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:29,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:51:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2021-10-29 05:51:29,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:29,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220373799] [2021-10-29 05:51:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:29,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:29,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:51:29,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087096143] [2021-10-29 05:51:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:29,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:29,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:51:30,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:51:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:51:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:51:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:51:30,138 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 05:51:30,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:51:30,188 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 05:51:30,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:51:30,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220373799] [2021-10-29 05:51:30,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:30,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087096143] [2021-10-29 05:51:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087096143] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:51:30,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531145570] [2021-10-29 05:51:30,211 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:51:30,212 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:51:30,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:51:30,232 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:51:30,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:51:30,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,275 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:51:30,276 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:51:30,278 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:51:30,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:51:30,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:51:30,324 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-10-29 05:51:30,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,368 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 05:51:30,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:51:30,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:51:30,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:30,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:51:30,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:51:30,396 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:51:30,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:30,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:30,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:30,533 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 05:51:30,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:51:30,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:51:30,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:30,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:30,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,592 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:51:30,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:51:30,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:51:30,625 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:51:30,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:51:30,664 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-10-29 05:51:30,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-10-29 05:51:30,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-10-29 05:51:30,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:30,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:30,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:30,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:30,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 334 [2021-10-29 05:51:30,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:31,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 411 [2021-10-29 05:51:31,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:31,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 520 [2021-10-29 05:51:31,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:31,214 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:51:31,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:51:31,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:31,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-29 05:51:31,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:31,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-10-29 05:51:31,261 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:51:31,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:51:31,270 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-10-29 05:51:31,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-29 05:51:31,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:31,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-10-29 05:51:31,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:31,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-29 05:51:31,394 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:51:35,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:35,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:51:35,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-29 05:51:35,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879010026] [2021-10-29 05:51:35,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:51:35,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:51:35,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:51:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:51:35,108 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:51:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:51:35,142 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-29 05:51:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:51:35,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-29 05:51:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:51:35,144 INFO L225 Difference]: With dead ends: 31 [2021-10-29 05:51:35,144 INFO L226 Difference]: Without dead ends: 25 [2021-10-29 05:51:35,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:51:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-29 05:51:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-29 05:51:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:51:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-29 05:51:35,150 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-10-29 05:51:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:51:35,151 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-29 05:51:35,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:51:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-29 05:51:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-29 05:51:35,152 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:35,152 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2021-10-29 05:51:35,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:51:35,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:35,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:51:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -468451453, now seen corresponding path program 1 times [2021-10-29 05:51:35,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:35,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69678372] [2021-10-29 05:51:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:35,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:35,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:51:35,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095085524] [2021-10-29 05:51:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:35,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:35,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:51:35,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:51:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:51:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:51:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:51:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:51:35,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:51:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:51:35,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:51:35,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69678372] [2021-10-29 05:51:35,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:35,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095085524] [2021-10-29 05:51:35,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095085524] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:51:35,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720925547] [2021-10-29 05:51:35,585 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-29 05:51:35,585 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:51:35,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:51:35,586 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:51:35,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:51:35,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,594 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:51:35,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:51:35,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:51:35,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:51:35,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:51:35,607 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-10-29 05:51:35,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:51:35,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:51:35,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:51:35,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,634 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 05:51:35,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:51:35,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:51:35,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:35,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:35,687 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 05:51:35,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:51:35,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,693 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:51:35,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:35,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,707 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:51:35,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:51:35,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:51:35,710 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:51:35,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:51:35,733 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-10-29 05:51:35,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-10-29 05:51:35,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 278 [2021-10-29 05:51:35,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:35,825 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:51:35,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:51:35,831 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-29 05:51:35,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-10-29 05:51:35,856 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:51:35,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:51:35,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:35,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-29 05:51:35,882 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:51:36,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:36,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:51:36,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-29 05:51:36,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734252776] [2021-10-29 05:51:36,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:51:36,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:51:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:51:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:51:36,686 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 05:51:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:51:36,728 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-29 05:51:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:51:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-29 05:51:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:51:36,730 INFO L225 Difference]: With dead ends: 35 [2021-10-29 05:51:36,730 INFO L226 Difference]: Without dead ends: 21 [2021-10-29 05:51:36,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:51:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-29 05:51:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-29 05:51:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 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 05:51:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-29 05:51:36,735 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 13 [2021-10-29 05:51:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:51:36,735 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-29 05:51:36,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 05:51:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-29 05:51:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:51:36,738 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:36,738 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:51:36,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:51:36,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-29 05:51:36,949 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:51:36,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:36,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1671355727, now seen corresponding path program 1 times [2021-10-29 05:51:36,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:36,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163351091] [2021-10-29 05:51:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:36,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:36,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:51:36,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95752743] [2021-10-29 05:51:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:36,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:36,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:51:36,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:51:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:51:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:51:37,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:51:37,315 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 05:51:37,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:51:37,828 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 05:51:37,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:51:37,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163351091] [2021-10-29 05:51:37,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:37,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95752743] [2021-10-29 05:51:37,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95752743] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:51:37,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120582092] [2021-10-29 05:51:37,833 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:51:37,833 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:51:37,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:51:37,833 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:51:37,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:51:37,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,849 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:51:37,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:51:37,851 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:51:37,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:51:37,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:51:37,861 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-10-29 05:51:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,885 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 05:51:37,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:51:37,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:51:37,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:37,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:51:37,897 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:51:37,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:51:37,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:37,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:37,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:51:37,930 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 05:51:37,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:51:37,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:51:37,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:51:37,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:37,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,944 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:51:37,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:51:37,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:51:37,948 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:51:37,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:51:37,959 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-10-29 05:51:37,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-10-29 05:51:37,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:37,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-10-29 05:51:37,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:37,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 331 [2021-10-29 05:51:38,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 408 [2021-10-29 05:51:38,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 517 [2021-10-29 05:51:38,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:51:38,218 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:51:38,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:51:38,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-29 05:51:38,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-10-29 05:51:38,250 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:51:38,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:51:38,258 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-29 05:51:38,271 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-10-29 05:51:38,286 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:51:38,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 05:51:38,298 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:51:39,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:39,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:51:39,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-29 05:51:39,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114290820] [2021-10-29 05:51:39,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:51:39,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:51:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:51:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-29 05:51:39,742 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 05:51:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:51:40,230 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2021-10-29 05:51:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:51:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) Word has length 14 [2021-10-29 05:51:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:51:40,233 INFO L225 Difference]: With dead ends: 25 [2021-10-29 05:51:40,233 INFO L226 Difference]: Without dead ends: 19 [2021-10-29 05:51:40,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-10-29 05:51:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-29 05:51:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-29 05:51:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:51:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2021-10-29 05:51:40,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 14 [2021-10-29 05:51:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:51:40,238 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2021-10-29 05:51:40,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 05:51:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2021-10-29 05:51:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:51:40,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:40,243 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-29 05:51:40,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:51:40,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-29 05:51:40,453 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 05:51:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1637136791, now seen corresponding path program 1 times [2021-10-29 05:51:40,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:40,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536968984] [2021-10-29 05:51:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:40,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:40,467 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:51:40,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921717808] [2021-10-29 05:51:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:40,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:40,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:51:40,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:51:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:51:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-29 05:51:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:51:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:51:41,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:51:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:51:41,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:51:41,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536968984] [2021-10-29 05:51:41,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:51:41,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921717808] [2021-10-29 05:51:41,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921717808] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-29 05:51:41,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:51:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-29 05:51:41,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931951327] [2021-10-29 05:51:41,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:51:41,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:51:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:51:41,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:51:41,166 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 05:51:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:51:42,063 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-10-29 05:51:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:51:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-29 05:51:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:51:42,064 INFO L225 Difference]: With dead ends: 19 [2021-10-29 05:51:42,064 INFO L226 Difference]: Without dead ends: 17 [2021-10-29 05:51:42,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:51:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-29 05:51:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-29 05:51:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0) internal successors, (16), 16 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:51:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2021-10-29 05:51:42,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 14 [2021-10-29 05:51:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:51:42,070 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2021-10-29 05:51:42,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 05:51:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2021-10-29 05:51:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 05:51:42,071 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:51:42,072 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:51:42,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:51:42,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-29 05:51:42,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:51:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:51:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1330269428, now seen corresponding path program 2 times [2021-10-29 05:51:42,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:51:42,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891772063] [2021-10-29 05:51:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:51:42,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:51:42,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:51:42,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225531464] [2021-10-29 05:51:42,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:51:42,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:51:42,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:51:42,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 05:51:43,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-29 05:51:43,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-29 05:51:43,421 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:51:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:51:43,467 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:51:43,468 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:51:43,469 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:51:43,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:51:43,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:51:43,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-29 05:51:43,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:51:43,696 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2021-10-29 05:51:43,699 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:51:43,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:51:43 BoogieIcfgContainer [2021-10-29 05:51:43,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:51:43,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:51:43,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:51:43,736 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:51:43,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:51:24" (3/4) ... [2021-10-29 05:51:43,739 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:51:43,789 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:51:43,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:51:43,791 INFO L168 Benchmark]: Toolchain (without parser) took 20144.32 ms. Allocated memory was 119.5 MB in the beginning and 165.7 MB in the end (delta: 46.1 MB). Free memory was 87.5 MB in the beginning and 52.5 MB in the end (delta: 35.0 MB). Peak memory consumption was 80.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:51:43,791 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:51:43,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.27 ms. Allocated memory is still 119.5 MB. Free memory was 87.2 MB in the beginning and 93.5 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:51:43,792 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.98 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:51:43,792 INFO L168 Benchmark]: Boogie Preprocessor took 23.37 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 90.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:51:43,793 INFO L168 Benchmark]: RCFGBuilder took 455.36 ms. Allocated memory is still 119.5 MB. Free memory was 90.8 MB in the beginning and 78.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:51:43,793 INFO L168 Benchmark]: TraceAbstraction took 19274.42 ms. Allocated memory was 119.5 MB in the beginning and 165.7 MB in the end (delta: 46.1 MB). Free memory was 78.3 MB in the beginning and 54.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. [2021-10-29 05:51:43,794 INFO L168 Benchmark]: Witness Printer took 53.94 ms. Allocated memory is still 165.7 MB. Free memory was 54.6 MB in the beginning and 52.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:51:43,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.27 ms. Allocated memory is still 119.5 MB. Free memory was 87.2 MB in the beginning and 93.5 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.98 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.37 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 90.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 455.36 ms. Allocated memory is still 119.5 MB. Free memory was 90.8 MB in the beginning and 78.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19274.42 ms. Allocated memory was 119.5 MB in the beginning and 165.7 MB in the end (delta: 46.1 MB). Free memory was 78.3 MB in the beginning and 54.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. * Witness Printer took 53.94 ms. Allocated memory is still 165.7 MB. Free memory was 54.6 MB in the beginning and 52.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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() [L7] COND FALSE !(!cond) [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND FALSE !(counter++<2) [L10] COND FALSE !(!(cond)) VAL [counter=3] [L10] COND TRUE !(cond) VAL [counter=3] [L12] reach_error() VAL [counter=3] - 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: 19.1s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 86 SDslu, 107 SDs, 0 SdLazy, 101 SolverSat, 28 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 110 ConstructedInterpolants, 4 QuantifiedInterpolants, 734 SizeOfPredicates, 18 NumberOfNonLiveVariables, 408 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 24/48 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 05:51:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80990836-9abb-42d9-94d4-5973b1062c01/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...