./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array17_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array17_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs --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 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:41,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:41,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:41,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:41,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:41,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:41,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:41,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:41,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:41,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:41,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:41,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:41,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:41,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:41,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:41,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:41,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:41,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:41,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:41,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:41,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:41,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:41,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:41,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:41,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:41,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:41,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:41,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:41,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:41,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:41,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:41,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:41,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:41,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:41,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:41,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:41,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:41,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:41,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:41,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:41,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:41,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:41,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:41,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:41,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:41,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:41,692 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:41,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:41,693 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:41,693 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:41,693 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:41,693 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:41,693 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:41,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:41,694 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:41,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:41,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:41,695 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:41,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:41,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:41,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:41,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:41,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:41,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:41,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:41,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:41,699 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:41,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:41,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:41,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:41,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:41,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:41,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:41,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:41,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:41,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:41,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:41,704 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:41,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:41,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:41,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:41,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:41,706 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_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 [2021-11-19 14:16:41,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:42,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:42,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:42,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:42,033 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:42,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/array-patterns/array17_pattern.c [2021-11-19 14:16:42,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/data/343694b67/5c9a6d0381a14cf8b4cb1964df536140/FLAGd89dfdb3e [2021-11-19 14:16:42,580 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:42,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/sv-benchmarks/c/array-patterns/array17_pattern.c [2021-11-19 14:16:42,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/data/343694b67/5c9a6d0381a14cf8b4cb1964df536140/FLAGd89dfdb3e [2021-11-19 14:16:42,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/data/343694b67/5c9a6d0381a14cf8b4cb1964df536140 [2021-11-19 14:16:42,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:42,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:42,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:42,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:42,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:42,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:42" (1/1) ... [2021-11-19 14:16:42,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9db9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:42, skipping insertion in model container [2021-11-19 14:16:42,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:42" (1/1) ... [2021-11-19 14:16:42,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:42,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:43,141 WARN L230 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_1a8874dd-49c7-4193-b3b8-50aa98142426/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2021-11-19 14:16:43,163 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:43,170 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:43,182 WARN L230 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_1a8874dd-49c7-4193-b3b8-50aa98142426/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2021-11-19 14:16:43,195 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:43,208 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:43,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43 WrapperNode [2021-11-19 14:16:43,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:43,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:43,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:43,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:43,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,247 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-11-19 14:16:43,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:43,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:43,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:43,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:43,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:43,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:43,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:43,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:43,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:43,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:43,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:16:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:16:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:16:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:16:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 14:16:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 14:16:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:16:43,475 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:43,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:43,643 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:43,720 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:43,720 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-19 14:16:43,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:43 BoogieIcfgContainer [2021-11-19 14:16:43,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:43,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:43,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:43,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:43,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:42" (1/3) ... [2021-11-19 14:16:43,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9677e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:43, skipping insertion in model container [2021-11-19 14:16:43,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43" (2/3) ... [2021-11-19 14:16:43,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9677e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:43, skipping insertion in model container [2021-11-19 14:16:43,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:43" (3/3) ... [2021-11-19 14:16:43,732 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2021-11-19 14:16:43,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:43,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:16:43,835 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:43,842 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:16:43,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:16:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 14:16:43,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:43,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:43,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2071670553, now seen corresponding path program 1 times [2021-11-19 14:16:43,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:43,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108649200] [2021-11-19 14:16:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:43,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:44,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:16:44,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504369915] [2021-11-19 14:16:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:44,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:44,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:44,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:44,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:16:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:44,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:16:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:44,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:44,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:16:44,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108649200] [2021-11-19 14:16:44,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:16:44,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504369915] [2021-11-19 14:16:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504369915] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:44,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:44,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:16:44,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856209406] [2021-11-19 14:16:44,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:44,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:16:44,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:16:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:16:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:44,317 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:16:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:44,350 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2021-11-19 14:16:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:16:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-19 14:16:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:44,359 INFO L225 Difference]: With dead ends: 28 [2021-11-19 14:16:44,359 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 14:16:44,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:44,366 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:44,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 14:16:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 14:16:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-19 14:16:44,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-19 14:16:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:44,404 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-19 14:16:44,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:16:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-19 14:16:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 14:16:44,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:44,406 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:44,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:44,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-19 14:16:44,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 916633033, now seen corresponding path program 1 times [2021-11-19 14:16:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:44,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233457952] [2021-11-19 14:16:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:44,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:44,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:16:44,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866870530] [2021-11-19 14:16:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:44,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:44,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:44,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:16:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:16:44,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:16:45,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:16:45,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233457952] [2021-11-19 14:16:45,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:16:45,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866870530] [2021-11-19 14:16:45,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866870530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:45,051 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:45,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:16:45,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881431123] [2021-11-19 14:16:45,052 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:45,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:45,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:16:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:45,054 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 14:16:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:45,115 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-11-19 14:16:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:45,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2021-11-19 14:16:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:45,116 INFO L225 Difference]: With dead ends: 23 [2021-11-19 14:16:45,116 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 14:16:45,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:45,140 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:45,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 14:16:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 14:16:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-19 14:16:45,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 19 [2021-11-19 14:16:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:45,155 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-19 14:16:45,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 14:16:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-19 14:16:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:16:45,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:45,156 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:45,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:45,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:45,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:45,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1792495404, now seen corresponding path program 1 times [2021-11-19 14:16:45,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:45,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796227694] [2021-11-19 14:16:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:45,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:45,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:16:45,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190289258] [2021-11-19 14:16:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:45,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:45,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:45,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:16:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:16:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:45,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:45,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:16:45,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796227694] [2021-11-19 14:16:45,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:16:45,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190289258] [2021-11-19 14:16:45,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190289258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:45,614 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:45,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 14:16:45,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302776839] [2021-11-19 14:16:45,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:45,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:16:45,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:45,618 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:16:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:45,733 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-11-19 14:16:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 22 [2021-11-19 14:16:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:45,736 INFO L225 Difference]: With dead ends: 41 [2021-11-19 14:16:45,737 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 14:16:45,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:45,742 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:45,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 14:16:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-19 14:16:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-11-19 14:16:45,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 22 [2021-11-19 14:16:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:45,757 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-19 14:16:45,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:16:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-11-19 14:16:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:16:45,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:45,763 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:45,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:45,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-19 14:16:45,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:45,979 INFO L85 PathProgramCache]: Analyzing trace with hash -957199016, now seen corresponding path program 1 times [2021-11-19 14:16:45,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:45,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365278469] [2021-11-19 14:16:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:45,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:45,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:16:45,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645464195] [2021-11-19 14:16:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:45,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:45,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:45,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:16:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:16:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:16:46,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 14:16:46,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:16:46,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365278469] [2021-11-19 14:16:46,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:16:46,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645464195] [2021-11-19 14:16:46,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645464195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:46,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:46,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:16:46,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590667239] [2021-11-19 14:16:46,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:46,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:46,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:16:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:46,192 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:16:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:46,261 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-19 14:16:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2021-11-19 14:16:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:46,270 INFO L225 Difference]: With dead ends: 40 [2021-11-19 14:16:46,270 INFO L226 Difference]: Without dead ends: 23 [2021-11-19 14:16:46,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:46,274 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:46,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-19 14:16:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-19 14:16:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-19 14:16:46,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 24 [2021-11-19 14:16:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:46,284 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-19 14:16:46,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:16:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-19 14:16:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 14:16:46,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:46,287 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:46,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:46,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:46,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash 566593900, now seen corresponding path program 1 times [2021-11-19 14:16:46,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:46,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177315885] [2021-11-19 14:16:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:46,526 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:16:46,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243486089] [2021-11-19 14:16:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:46,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8874dd-49c7-4193-b3b8-50aa98142426/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:16:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 14:16:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:46,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-19 14:16:46,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-19 14:16:47,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 571 treesize of output 557 [2021-11-19 14:16:49,066 INFO L354 Elim1Store]: treesize reduction 5280, result has 11.2 percent of original size [2021-11-19 14:16:49,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 49 case distinctions, treesize of input 801 treesize of output 1287 [2021-11-19 14:17:03,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:03,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 114 [2021-11-19 14:17:03,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 14:17:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 114 [2021-11-19 14:17:03,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 14:17:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:03,928 INFO L354 Elim1Store]: treesize reduction 177, result has 20.3 percent of original size [2021-11-19 14:17:03,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 161 [2021-11-19 14:17:04,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 14:17:04,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 14:17:04,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 56 [2021-11-19 14:17:04,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 53 [2021-11-19 14:17:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 90 [2021-11-19 14:17:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,871 INFO L354 Elim1Store]: treesize reduction 229, result has 15.2 percent of original size [2021-11-19 14:17:04,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 269 treesize of output 211 [2021-11-19 14:17:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:05,095 INFO L354 Elim1Store]: treesize reduction 198, result has 20.5 percent of original size [2021-11-19 14:17:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 314 treesize of output 225 [2021-11-19 14:17:05,441 WARN L906 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2021-11-19 14:17:05,813 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-19 14:17:05,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 39 [2021-11-19 14:17:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:17:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:46,812 WARN L227 SmtUtils]: Spent 20.75s on a formula simplification. DAG size of input: 82 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)