./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.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_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/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_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/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_69592620-b552-479d-ab5c-5033ed2aeaa2/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 136b155e37e2c6593adc196e1d46b83f5765a5c4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:49:28,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:49:28,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:49:28,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:49:28,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:49:28,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:49:28,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:49:28,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:49:28,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:49:28,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:49:28,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:49:28,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:49:28,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:49:28,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:49:28,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:49:28,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:49:28,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:49:28,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:49:28,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:49:28,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:49:28,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:49:28,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:49:28,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:49:28,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:49:28,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:49:28,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:49:28,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:49:28,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:49:28,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:49:28,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:49:28,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:49:28,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:49:28,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:49:28,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:49:28,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:49:28,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:49:28,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:49:28,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:49:28,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:49:28,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:49:28,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:49:28,210 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:49:28,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:49:28,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:49:28,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:49:28,235 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:49:28,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:49:28,235 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:49:28,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:49:28,235 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:49:28,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:49:28,236 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:49:28,236 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:49:28,236 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:49:28,236 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:49:28,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:49:28,237 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:49:28,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:49:28,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:49:28,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:49:28,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:49:28,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:49:28,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:49:28,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:49:28,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:49:28,239 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:49:28,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:49:28,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:49:28,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:49:28,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:49:28,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:49:28,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:49:28,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:49:28,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:49:28,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:49:28,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:49:28,241 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:49:28,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:49:28,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:49:28,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:49:28,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:49:28,242 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_69592620-b552-479d-ab5c-5033ed2aeaa2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 136b155e37e2c6593adc196e1d46b83f5765a5c4 [2021-10-13 07:49:28,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:49:28,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:49:28,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:49:28,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:49:28,525 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:49:28,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-10-13 07:49:28,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/data/3ff53cce2/43caa1a5b70f467cbe6fabd3ad7373dc/FLAGf1d64e648 [2021-10-13 07:49:28,978 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:49:28,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-10-13 07:49:28,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/data/3ff53cce2/43caa1a5b70f467cbe6fabd3ad7373dc/FLAGf1d64e648 [2021-10-13 07:49:29,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/data/3ff53cce2/43caa1a5b70f467cbe6fabd3ad7373dc [2021-10-13 07:49:29,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:49:29,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:49:29,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:49:29,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:49:29,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:49:29,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7150d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29, skipping insertion in model container [2021-10-13 07:49:29,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:49:29,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:49:29,608 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_69592620-b552-479d-ab5c-5033ed2aeaa2/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c[535,548] [2021-10-13 07:49:29,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:49:29,634 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:49:29,647 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_69592620-b552-479d-ab5c-5033ed2aeaa2/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c[535,548] [2021-10-13 07:49:29,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:49:29,670 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:49:29,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29 WrapperNode [2021-10-13 07:49:29,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:49:29,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:49:29,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:49:29,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:49:29,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:49:29,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:49:29,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:49:29,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:49:29,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:49:29,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:49:29,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:49:29,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:49:29,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (1/1) ... [2021-10-13 07:49:29,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:49:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:29,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:49:29,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:49:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:49:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:49:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:49:29,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:49:30,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:49:30,241 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:49:30,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:49:30 BoogieIcfgContainer [2021-10-13 07:49:30,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:49:30,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:49:30,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:49:30,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:49:30,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:49:29" (1/3) ... [2021-10-13 07:49:30,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0af44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:49:30, skipping insertion in model container [2021-10-13 07:49:30,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:49:29" (2/3) ... [2021-10-13 07:49:30,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0af44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:49:30, skipping insertion in model container [2021-10-13 07:49:30,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:49:30" (3/3) ... [2021-10-13 07:49:30,251 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.c [2021-10-13 07:49:30,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:49:30,256 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-13 07:49:30,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:49:30,318 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 07:49:30,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-13 07:49:30,342 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 07:49:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:49:30,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:30,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:49:30,347 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 07:49:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash 145241150, now seen corresponding path program 1 times [2021-10-13 07:49:30,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:49:30,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076011078] [2021-10-13 07:49:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:30,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:49:30,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:49:30,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917758139] [2021-10-13 07:49:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:30,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:30,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:30,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:49:30,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:49:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:49:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:49:30,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:49:30,602 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 07:49:30,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:49:30,621 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 07:49:30,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:49:30,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076011078] [2021-10-13 07:49:30,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:49:30,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917758139] [2021-10-13 07:49:30,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917758139] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:49:30,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:49:30,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:49:30,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17759321] [2021-10-13 07:49:30,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:49:30,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:49:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:49:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:49:30,656 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 07:49:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:30,678 INFO L93 Difference]: Finished difference Result 49 states and 73 transitions. [2021-10-13 07:49:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:49:30,680 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 07:49:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:30,688 INFO L225 Difference]: With dead ends: 49 [2021-10-13 07:49:30,688 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:49:30,692 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 07:49:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:49:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:49:30,725 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 07:49:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-10-13 07:49:30,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 5 [2021-10-13 07:49:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:30,729 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-10-13 07:49:30,729 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 07:49:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-10-13 07:49:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:49:30,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:30,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:49:30,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:30,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 07:49:30,948 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 07:49:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash 142873761, now seen corresponding path program 1 times [2021-10-13 07:49:30,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:49:30,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554829221] [2021-10-13 07:49:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:30,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:49:30,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:49:30,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89972246] [2021-10-13 07:49:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:30,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:30,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:49:30,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:49:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:49:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:49:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:49:31,248 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 07:49:31,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:49:32,925 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 07:49:32,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:49:32,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554829221] [2021-10-13 07:49:32,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:49:32,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89972246] [2021-10-13 07:49:32,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89972246] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:49:32,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:49:32,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:49:32,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073376768] [2021-10-13 07:49:32,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:49:32,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:49:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:49:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:49:32,930 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 07:49:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:38,823 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-13 07:49:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:49:38,825 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 07:49:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:38,826 INFO L225 Difference]: With dead ends: 55 [2021-10-13 07:49:38,826 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 07:49:38,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1657.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:49:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 07:49:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-10-13 07:49:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-10-13 07:49:38,836 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 5 [2021-10-13 07:49:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:38,836 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-10-13 07:49:38,836 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 07:49:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-10-13 07:49:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:49:38,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:38,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:49:38,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:39,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:39,064 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 07:49:39,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 134130281, now seen corresponding path program 1 times [2021-10-13 07:49:39,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:49:39,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881373346] [2021-10-13 07:49:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:39,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:49:39,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:49:39,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631794796] [2021-10-13 07:49:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:39,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:39,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:39,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:49:39,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:49:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:49:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:49:39,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:49:39,152 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 07:49:39,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:49:39,177 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 07:49:39,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:49:39,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881373346] [2021-10-13 07:49:39,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:49:39,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631794796] [2021-10-13 07:49:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631794796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:49:39,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:49:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:49:39,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568582378] [2021-10-13 07:49:39,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:49:39,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:49:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:49:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:49:39,182 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:39,219 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-10-13 07:49:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:49:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:49:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:39,222 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:49:39,223 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 07:49:39,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:49:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 07:49:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-10-13 07:49:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 36 states have internal predecessors, (48), 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 07:49:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-10-13 07:49:39,232 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 6 [2021-10-13 07:49:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:39,232 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-10-13 07:49:39,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-10-13 07:49:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:49:39,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:39,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:49:39,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-13 07:49:39,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:39,456 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 07:49:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash 44578946, now seen corresponding path program 1 times [2021-10-13 07:49:39,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:49:39,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193093260] [2021-10-13 07:49:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:39,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:49:39,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:49:39,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478172284] [2021-10-13 07:49:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:39,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:39,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:49:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:49:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:49:39,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:49:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:49:39,645 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 07:49:39,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:49:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:49:39,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:49:39,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193093260] [2021-10-13 07:49:39,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:49:39,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478172284] [2021-10-13 07:49:39,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478172284] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:49:39,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:49:39,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-13 07:49:39,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9702610] [2021-10-13 07:49:39,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:49:39,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:49:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:49:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:49:39,758 INFO L87 Difference]: Start difference. First operand 37 states and 48 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 07:49:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:39,894 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-10-13 07:49:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:49:39,894 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 07:49:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:39,904 INFO L225 Difference]: With dead ends: 41 [2021-10-13 07:49:39,904 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:49:39,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:49:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:49:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-10-13 07:49:39,909 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 07:49:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 07:49:39,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2021-10-13 07:49:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:39,910 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 07:49:39,910 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 07:49:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 07:49:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:49:39,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:39,917 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:49:39,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 07:49:40,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-13 07:49:40,132 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 07:49:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1028231639, now seen corresponding path program 1 times [2021-10-13 07:49:40,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:49:40,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217263528] [2021-10-13 07:49:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:40,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:49:40,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:49:40,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877274552] [2021-10-13 07:49:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:40,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:40,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:40,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:49:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:49:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:49:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:49:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:49:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:49:40,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:49:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:49:40,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:49:40,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217263528] [2021-10-13 07:49:40,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:49:40,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877274552] [2021-10-13 07:49:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877274552] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:49:40,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:49:40,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:49:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42471665] [2021-10-13 07:49:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:49:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:49:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:49:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:49:40,332 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:40,364 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-10-13 07:49:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:49:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:49:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:40,366 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:49:40,366 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:49:40,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:49:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:49:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:49:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2021-10-13 07:49:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-13 07:49:40,378 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-10-13 07:49:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-13 07:49:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-13 07:49:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:49:40,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:40,379 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:49:40,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:40,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:40,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:49:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 309725008, now seen corresponding path program 1 times [2021-10-13 07:49:40,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:49:40,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824258590] [2021-10-13 07:49:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:40,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:49:40,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:49:40,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102642567] [2021-10-13 07:49:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:40,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:49:40,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:49:40,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:49:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:49:40,693 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:49:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:49:40,727 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:49:40,727 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:49:40,728 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:40,730 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:40,730 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:40,731 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:40,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:49:40,961 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:49:40,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:49:40 BoogieIcfgContainer [2021-10-13 07:49:40,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:49:40,989 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:49:40,989 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:49:40,989 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:49:40,990 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:49:30" (3/4) ... [2021-10-13 07:49:40,993 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:49:41,046 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:49:41,047 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:49:41,048 INFO L168 Benchmark]: Toolchain (without parser) took 11668.12 ms. Allocated memory was 79.7 MB in the beginning and 123.7 MB in the end (delta: 44.0 MB). Free memory was 37.9 MB in the beginning and 72.2 MB in the end (delta: -34.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:41,049 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 79.7 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:49:41,050 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.54 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 37.8 MB in the beginning and 75.1 MB in the end (delta: -37.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:41,050 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 102.8 MB. Free memory was 75.1 MB in the beginning and 73.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:41,051 INFO L168 Benchmark]: Boogie Preprocessor took 23.18 ms. Allocated memory is still 102.8 MB. Free memory was 73.1 MB in the beginning and 72.1 MB in the end (delta: 986.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:49:41,051 INFO L168 Benchmark]: RCFGBuilder took 511.00 ms. Allocated memory is still 102.8 MB. Free memory was 72.1 MB in the beginning and 69.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:41,052 INFO L168 Benchmark]: TraceAbstraction took 10743.72 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 69.5 MB in the beginning and 74.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:41,053 INFO L168 Benchmark]: Witness Printer took 57.81 ms. Allocated memory is still 123.7 MB. Free memory was 74.3 MB in the beginning and 72.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:41,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 79.7 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.54 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 37.8 MB in the beginning and 75.1 MB in the end (delta: -37.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 102.8 MB. Free memory was 75.1 MB in the beginning and 73.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.18 ms. Allocated memory is still 102.8 MB. Free memory was 73.1 MB in the beginning and 72.1 MB in the end (delta: 986.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 511.00 ms. Allocated memory is still 102.8 MB. Free memory was 72.1 MB in the beginning and 69.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10743.72 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 69.5 MB in the beginning and 74.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. * Witness Printer took 57.81 ms. Allocated memory is still 123.7 MB. Free memory was 74.3 MB in the beginning and 72.2 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, 0.0ms 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++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND FALSE !(counter++<2) [L34] EXPR counter++ VAL [counter=4] [L34] COND FALSE !(counter++<2) [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: 10660.2ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 10.7ms, AutomataDifference: 6176.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 100 SDtfs, 97 SDslu, 176 SDs, 0 SdLazy, 110 SolverSat, 40 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5939.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1807.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 33 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 50.1ms SsaConstructionTime, 103.4ms SatisfiabilityAnalysisTime, 2352.3ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 356 SizeOfPredicates, 18 NumberOfNonLiveVariables, 329 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 4/4 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 07:49:41,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69592620-b552-479d-ab5c-5033ed2aeaa2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...