./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8 --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 516995e3ae59a20b0dc721bf699a545863802fef ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 06:46:34,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:46:34,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:46:34,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:46:34,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:46:34,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:46:34,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:46:34,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:46:34,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:46:34,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:46:34,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:46:34,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:46:34,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:46:34,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:46:34,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:46:34,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:46:34,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:46:34,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:46:34,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:46:34,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:46:34,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:46:34,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:46:34,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:46:34,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:46:34,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:46:34,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:46:34,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:46:34,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:46:34,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:46:34,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:46:34,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:46:34,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:46:34,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:46:34,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:46:34,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:46:34,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:46:34,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:46:34,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:46:34,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:46:34,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:46:34,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:46:34,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:46:34,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:46:34,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:46:34,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:46:34,422 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:46:34,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:46:34,423 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:46:34,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:46:34,423 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:46:34,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:46:34,424 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:46:34,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:46:34,424 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:46:34,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:46:34,425 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:46:34,425 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:46:34,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:46:34,426 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:46:34,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:46:34,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:46:34,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:46:34,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:46:34,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:46:34,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:46:34,427 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:46:34,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:46:34,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:46:34,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:46:34,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:46:34,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:46:34,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:46:34,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:46:34,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:46:34,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:46:34,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:46:34,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:46:34,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:46:34,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:46:34,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:46:34,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:46:34,431 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_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 516995e3ae59a20b0dc721bf699a545863802fef [2021-10-13 06:46:34,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:46:34,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:46:34,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:46:34,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:46:34,735 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:46:34,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2021-10-13 06:46:34,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/7672c9d63/1f521229e78e49f7b129d88530e1b9ba/FLAG3af2e79d6 [2021-10-13 06:46:35,236 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:46:35,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2021-10-13 06:46:35,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/7672c9d63/1f521229e78e49f7b129d88530e1b9ba/FLAG3af2e79d6 [2021-10-13 06:46:35,627 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/7672c9d63/1f521229e78e49f7b129d88530e1b9ba [2021-10-13 06:46:35,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:46:35,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:46:35,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:46:35,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:46:35,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:46:35,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b49869c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35, skipping insertion in model container [2021-10-13 06:46:35,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:46:35,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:46:35,833 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c[535,548] [2021-10-13 06:46:35,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:46:35,863 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:46:35,874 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_342c63d6-0c6b-4c8f-9061-a63e87682cce/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c[535,548] [2021-10-13 06:46:35,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:46:35,899 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:46:35,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35 WrapperNode [2021-10-13 06:46:35,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:46:35,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:46:35,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:46:35,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:46:35,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:46:35,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:46:35,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:46:35,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:46:35,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:46:35,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:46:35,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:46:35,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:46:35,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ... [2021-10-13 06:46:35,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:46:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:36,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:46:36,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:46:36,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:46:36,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:46:36,630 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 06:46:36,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:46:36 BoogieIcfgContainer [2021-10-13 06:46:36,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:46:36,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:46:36,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:46:36,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:46:36,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:46:35" (1/3) ... [2021-10-13 06:46:36,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1eb3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:46:36, skipping insertion in model container [2021-10-13 06:46:36,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (2/3) ... [2021-10-13 06:46:36,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1eb3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:46:36, skipping insertion in model container [2021-10-13 06:46:36,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:46:36" (3/3) ... [2021-10-13 06:46:36,640 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound1.c [2021-10-13 06:46:36,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:46:36,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-13 06:46:36,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:46:36,707 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, mConcurrency=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 [2021-10-13 06:46:36,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-13 06:46:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 24 states have internal predecessors, (37), 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) [2021-10-13 06:46:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:46:36,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:46:36,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:46:36,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 06:46:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:46:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash 145241150, now seen corresponding path program 1 times [2021-10-13 06:46:36,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:46:36,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078495498] [2021-10-13 06:46:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:36,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:46:36,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:46:36,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611227752] [2021-10-13 06:46:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:36,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:36,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:36,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:46:36,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:46:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:36,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:46:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:46:36,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:46:36,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:46:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078495498] [2021-10-13 06:46:36,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:46:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611227752] [2021-10-13 06:46:36,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611227752] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:46:36,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:46:36,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:46:36,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996774152] [2021-10-13 06:46:36,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:46:36,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:46:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:46:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:46:37,004 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 24 states have internal predecessors, (37), 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) [2021-10-13 06:46:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:46:37,026 INFO L93 Difference]: Finished difference Result 49 states and 73 transitions. [2021-10-13 06:46:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:46:37,028 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 [2021-10-13 06:46:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:46:37,037 INFO L225 Difference]: With dead ends: 49 [2021-10-13 06:46:37,037 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 06:46:37,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:46:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 06:46:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 06:46:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 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) [2021-10-13 06:46:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-10-13 06:46:37,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 5 [2021-10-13 06:46:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:46:37,086 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-10-13 06:46:37,086 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) [2021-10-13 06:46:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-10-13 06:46:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:46:37,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:46:37,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:46:37,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:37,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:37,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 06:46:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:46:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash 142873761, now seen corresponding path program 1 times [2021-10-13 06:46:37,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:46:37,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535644221] [2021-10-13 06:46:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:37,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:46:37,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:46:37,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799507542] [2021-10-13 06:46:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:37,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:37,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:46:37,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 06:46:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:46:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:46:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:46:45,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:46:45,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535644221] [2021-10-13 06:46:45,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:46:45,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799507542] [2021-10-13 06:46:45,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799507542] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:46:45,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:46:45,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:46:45,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268372979] [2021-10-13 06:46:45,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:46:45,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:46:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:46:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=12, Unknown=1, NotChecked=0, Total=20 [2021-10-13 06:46:45,097 INFO L87 Difference]: Start difference. First operand 23 states and 28 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) [2021-10-13 06:46:54,922 WARN L207 SmtUtils]: Spent 9.81 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-10-13 06:47:00,668 WARN L207 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-10-13 06:47:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:47:06,600 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-10-13 06:47:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:47:06,601 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 [2021-10-13 06:47:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:47:06,602 INFO L225 Difference]: With dead ends: 42 [2021-10-13 06:47:06,602 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 06:47:06,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22880.8ms TimeCoverageRelationStatistics Valid=22, Invalid=33, Unknown=1, NotChecked=0, Total=56 [2021-10-13 06:47:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 06:47:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 17. [2021-10-13 06:47:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) 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) [2021-10-13 06:47:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-13 06:47:06,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 5 [2021-10-13 06:47:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:47:06,609 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-13 06:47:06,609 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) [2021-10-13 06:47:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-13 06:47:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 06:47:06,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:47:06,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 06:47:06,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 06:47:06,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:06,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 06:47:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:47:06,812 INFO L82 PathProgramCache]: Analyzing trace with hash 134130281, now seen corresponding path program 1 times [2021-10-13 06:47:06,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:47:06,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508169067] [2021-10-13 06:47:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:06,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:47:06,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:47:06,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792518481] [2021-10-13 06:47:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:06,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:06,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:47:06,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:47:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 06:47:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:47:06,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:47:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:47:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:47:06,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:47:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:47:06,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:47:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508169067] [2021-10-13 06:47:06,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:47:06,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792518481] [2021-10-13 06:47:06,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792518481] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:47:06,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:47:06,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:47:06,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856300154] [2021-10-13 06:47:06,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:47:06,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:47:06,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:47:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:47:06,948 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:47:06,969 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-10-13 06:47:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:47:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 06:47:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:47:06,970 INFO L225 Difference]: With dead ends: 23 [2021-10-13 06:47:06,970 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 06:47:06,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:47:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 06:47:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 06:47:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-10-13 06:47:06,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2021-10-13 06:47:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:47:06,977 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-10-13 06:47:06,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-10-13 06:47:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:47:06,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:47:06,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:47:07,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:47:07,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:07,186 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 06:47:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:47:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash 44578946, now seen corresponding path program 1 times [2021-10-13 06:47:07,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:47:07,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358473467] [2021-10-13 06:47:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:07,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:47:07,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:47:07,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383254373] [2021-10-13 06:47:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:07,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:47:07,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:47:07,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 06:47:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:47:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:47:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:47:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:47:07,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:47:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:47:07,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:47:07,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358473467] [2021-10-13 06:47:07,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:47:07,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383254373] [2021-10-13 06:47:07,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383254373] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:47:07,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:47:07,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-13 06:47:07,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336032665] [2021-10-13 06:47:07,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:47:07,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:47:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:47:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:47:07,569 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:47:07,719 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-10-13 06:47:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:47:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 06:47:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:47:07,721 INFO L225 Difference]: With dead ends: 23 [2021-10-13 06:47:07,721 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 06:47:07,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:47:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 06:47:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 06:47:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-10-13 06:47:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 06:47:07,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2021-10-13 06:47:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:47:07,727 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 06:47:07,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 06:47:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 06:47:07,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:47:07,728 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:47:07,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:47:07,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:07,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 06:47:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:47:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1028231639, now seen corresponding path program 1 times [2021-10-13 06:47:07,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:47:07,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929398519] [2021-10-13 06:47:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:07,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:47:07,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:47:07,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100717772] [2021-10-13 06:47:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:07,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:47:07,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:47:07,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 06:47:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:47:08,034 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 06:47:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:47:08,076 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 06:47:08,089 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 06:47:08,091 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:47:08,093 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:47:08,093 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:47:08,094 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:47:08,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:47:08,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:47:08,323 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:47:08,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:47:08 BoogieIcfgContainer [2021-10-13 06:47:08,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:47:08,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:47:08,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:47:08,351 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:47:08,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:46:36" (3/4) ... [2021-10-13 06:47:08,354 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 06:47:08,416 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:47:08,416 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:47:08,417 INFO L168 Benchmark]: Toolchain (without parser) took 32786.09 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 70.8 MB in the beginning and 66.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,418 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 58.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:47:08,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.71 ms. Allocated memory is still 102.8 MB. Free memory was 70.5 MB in the beginning and 78.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.11 ms. Allocated memory is still 102.8 MB. Free memory was 77.9 MB in the beginning and 76.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,420 INFO L168 Benchmark]: Boogie Preprocessor took 28.44 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,420 INFO L168 Benchmark]: RCFGBuilder took 657.88 ms. Allocated memory is still 102.8 MB. Free memory was 74.9 MB in the beginning and 60.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,421 INFO L168 Benchmark]: TraceAbstraction took 31716.61 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 69.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,422 INFO L168 Benchmark]: Witness Printer took 65.44 ms. Allocated memory is still 123.7 MB. Free memory was 69.1 MB in the beginning and 66.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:47:08,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 58.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.71 ms. Allocated memory is still 102.8 MB. Free memory was 70.5 MB in the beginning and 78.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.11 ms. Allocated memory is still 102.8 MB. Free memory was 77.9 MB in the beginning and 76.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.44 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 657.88 ms. Allocated memory is still 102.8 MB. Free memory was 74.9 MB in the beginning and 60.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31716.61 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 69.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * Witness Printer took 65.44 ms. Allocated memory is still 123.7 MB. Free memory was 69.1 MB in the beginning and 66.1 MB in the end (delta: 3.0 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<1 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND FALSE !(counter++<1) [L47] EXPR counter++ VAL [counter=3] [L47] COND FALSE !(counter++<1) [L34] EXPR counter++ VAL [counter=4] [L34] COND FALSE !(counter++<1) [L12] COND TRUE !(cond) VAL [counter=4] [L14] reach_error() VAL [counter=4] - UnprovableResult [Line: 14]: 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: 14]: 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: 14]: 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, 25 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 31623.6ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 10.6ms, AutomataDifference: 21735.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 71 SDtfs, 128 SDslu, 61 SDs, 0 SdLazy, 73 SolverSat, 50 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5993.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23011.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 30.4ms SsaConstructionTime, 101.2ms SatisfiabilityAnalysisTime, 8149.1ms InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 306 SizeOfPredicates, 17 NumberOfNonLiveVariables, 247 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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! [2021-10-13 06:47:08,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...