./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8 --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 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:11,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:11,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:11,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:11,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:11,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:11,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:11,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:11,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:11,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:11,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:11,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:11,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:11,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:11,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:11,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:11,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:11,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:11,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:11,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:11,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:11,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:11,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:11,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:11,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:11,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:11,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:11,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:11,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:11,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:11,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:11,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:11,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:11,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:11,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:11,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:11,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:11,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:11,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:11,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:11,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:11,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:31:11,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:11,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:11,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:11,775 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:11,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:11,775 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:11,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:31:11,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:11,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:11,782 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:31:11,783 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:31:11,784 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:11,784 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:31:11,784 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:31:11,784 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:31:11,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:11,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:11,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:31:11,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:11,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:11,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:11,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:11,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:11,787 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:11,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:11,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:11,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:11,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:11,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:11,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:11,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:11,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:11,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:11,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:11,791 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:31:11,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:31:11,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:11,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:11,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:11,792 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_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e [2021-11-07 01:31:12,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:12,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:12,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:12,066 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:12,067 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:12,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-regression/test23-1.c [2021-11-07 01:31:12,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/e60043cef/12cf1bb04d4b41afaf4349e75bce9e3b/FLAG4de96373d [2021-11-07 01:31:12,698 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:12,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/sv-benchmarks/c/ldv-regression/test23-1.c [2021-11-07 01:31:12,709 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/e60043cef/12cf1bb04d4b41afaf4349e75bce9e3b/FLAG4de96373d [2021-11-07 01:31:13,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/e60043cef/12cf1bb04d4b41afaf4349e75bce9e3b [2021-11-07 01:31:13,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:13,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:13,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:13,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:13,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:13,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579ee2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13, skipping insertion in model container [2021-11-07 01:31:13,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:13,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:13,306 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_f879303f-7cef-4925-be1f-858066607a9f/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2021-11-07 01:31:13,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:13,328 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:31:13,364 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_f879303f-7cef-4925-be1f-858066607a9f/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2021-11-07 01:31:13,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:13,381 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:31:13,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13 WrapperNode [2021-11-07 01:31:13,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:13,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:13,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:31:13,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:31:13,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:13,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:31:13,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:31:13,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:31:13,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:31:13,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:31:13,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:31:13,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:31:13,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (1/1) ... [2021-11-07 01:31:13,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:13,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:13,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:31:13,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:31:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:31:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:31:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 01:31:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:31:13,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:31:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 01:31:14,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:31:14,109 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 01:31:14,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:14 BoogieIcfgContainer [2021-11-07 01:31:14,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:31:14,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:31:14,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:31:14,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:31:14,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:13" (1/3) ... [2021-11-07 01:31:14,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9b8d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:14, skipping insertion in model container [2021-11-07 01:31:14,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:13" (2/3) ... [2021-11-07 01:31:14,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9b8d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:14, skipping insertion in model container [2021-11-07 01:31:14,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:14" (3/3) ... [2021-11-07 01:31:14,128 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2021-11-07 01:31:14,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:31:14,136 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:31:14,200 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:31:14,206 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 [2021-11-07 01:31:14,206 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:31:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2021-11-07 01:31:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:31:14,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:14,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:31:14,227 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1436433901, now seen corresponding path program 1 times [2021-11-07 01:31:14,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:14,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231120126] [2021-11-07 01:31:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:14,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:14,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231120126] [2021-11-07 01:31:14,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231120126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:14,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:14,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:31:14,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462783013] [2021-11-07 01:31:14,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:31:14,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:31:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:31:14,458 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:14,471 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-11-07 01:31:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:31:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:31:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:14,479 INFO L225 Difference]: With dead ends: 18 [2021-11-07 01:31:14,480 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 01:31:14,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:31:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 01:31:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 01:31:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-07 01:31:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-07 01:31:14,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-07 01:31:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:14,510 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-07 01:31:14,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-07 01:31:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:31:14,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:14,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:14,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:31:14,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1586974135, now seen corresponding path program 1 times [2021-11-07 01:31:14,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:14,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350481552] [2021-11-07 01:31:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:14,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:14,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350481552] [2021-11-07 01:31:14,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350481552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:14,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:14,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:31:14,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523864583] [2021-11-07 01:31:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:14,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:14,724 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-07 01:31:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:14,793 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-07 01:31:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-07 01:31:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:14,795 INFO L225 Difference]: With dead ends: 14 [2021-11-07 01:31:14,795 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 01:31:14,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:31:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 01:31:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-07 01:31:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-11-07 01:31:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-07 01:31:14,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-07 01:31:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:14,803 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-07 01:31:14,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-07 01:31:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-07 01:31:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:31:14,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:14,804 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:14,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:31:14,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:14,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:14,810 INFO L85 PathProgramCache]: Analyzing trace with hash -337674460, now seen corresponding path program 1 times [2021-11-07 01:31:14,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:14,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027345492] [2021-11-07 01:31:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:14,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:14,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027345492] [2021-11-07 01:31:14,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027345492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:31:14,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022134821] [2021-11-07 01:31:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:31:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:14,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:31:14,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:31:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:31:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:15,134 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 68 treesize of output 64 [2021-11-07 01:31:25,540 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-11-07 01:31:25,541 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 66 treesize of output 19 [2021-11-07 01:31:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:25,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:25,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-07 01:31:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:25,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022134821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:25,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504869378] [2021-11-07 01:31:25,664 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-07 01:31:25,665 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:31:25,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:31:25,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:31:25,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:31:25,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,717 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-07 01:31:25,729 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,732 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-07 01:31:25,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-07 01:31:25,736 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,738 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-07 01:31:25,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-07 01:31:25,742 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,745 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-07 01:31:25,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-07 01:31:25,748 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,751 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-07 01:31:25,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-07 01:31:25,754 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,755 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,756 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-07 01:31:25,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-07 01:31:25,759 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-07 01:31:25,763 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:31:25,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-07 01:31:25,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 340 [2021-11-07 01:31:25,811 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_23|], 55=[|v_#valid_24|]} [2021-11-07 01:31:25,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:25,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-07 01:31:25,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:25,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:25,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-07 01:31:26,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:26,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:26,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-07 01:31:26,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:26,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:26,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-07 01:31:26,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:26,382 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:31:26,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:26,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:31:26,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,771 INFO L244 Elim1Store]: Index analysis took 134 ms [2021-11-07 01:31:26,860 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 01:31:26,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 01:31:26,861 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:26,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:26,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:26,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,078 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-11-07 01:31:27,146 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 01:31:27,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 01:31:27,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:27,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:27,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:27,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,366 INFO L244 Elim1Store]: Index analysis took 125 ms [2021-11-07 01:31:27,433 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 01:31:27,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 01:31:27,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:27,442 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:27,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:27,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:27,597 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 01:31:27,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 01:31:27,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:27,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-07 01:31:27,606 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-11-07 01:31:27,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:31:27,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:27,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:31:27,890 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:63) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 01:31:27,894 INFO L168 Benchmark]: Toolchain (without parser) took 14836.63 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 70.0 MB in the beginning and 71.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:27,894 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 75.5 MB. Free memory is still 35.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:31:27,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.82 ms. Allocated memory is still 100.7 MB. Free memory was 69.8 MB in the beginning and 76.5 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:27,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.41 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 75.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:27,895 INFO L168 Benchmark]: Boogie Preprocessor took 37.54 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 73.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:27,896 INFO L168 Benchmark]: RCFGBuilder took 636.81 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 53.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:27,896 INFO L168 Benchmark]: TraceAbstraction took 13776.03 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 53.1 MB in the beginning and 71.2 MB in the end (delta: -18.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:27,900 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 75.5 MB. Free memory is still 35.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.82 ms. Allocated memory is still 100.7 MB. Free memory was 69.8 MB in the beginning and 76.5 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.41 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 75.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.54 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 73.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 636.81 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 53.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13776.03 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 53.1 MB in the beginning and 71.2 MB in the end (delta: -18.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-07 01:31:27,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8 --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 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:30,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:30,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:30,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:30,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:30,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:30,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:30,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:30,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:30,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:30,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:30,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:30,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:30,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:30,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:30,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:30,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:30,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:30,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:30,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:30,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:30,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:30,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:30,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:30,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:30,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:30,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:30,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:30,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:30,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:30,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:30,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:30,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:30,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:30,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:30,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:30,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:30,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:30,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:30,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:30,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:30,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:31:30,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:30,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:30,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:30,596 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:30,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:30,596 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:30,596 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:30,597 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:30,597 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:30,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:30,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:30,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:30,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:30,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:30,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:30,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:30,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:30,601 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:31:30,601 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:31:30,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:30,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:30,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:30,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:30,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:30,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:31:30,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:30,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:30,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:30,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:30,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:30,604 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:31:30,604 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:30,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:30,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:30,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:30,605 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e [2021-11-07 01:31:30,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:30,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:30,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:30,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:30,997 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:30,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-regression/test23-1.c [2021-11-07 01:31:31,069 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/accdfe029/08463bbe33fe4c35bf1459e5c5c6c464/FLAGe43aeeccd [2021-11-07 01:31:31,584 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:31,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/sv-benchmarks/c/ldv-regression/test23-1.c [2021-11-07 01:31:31,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/accdfe029/08463bbe33fe4c35bf1459e5c5c6c464/FLAGe43aeeccd [2021-11-07 01:31:31,946 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/data/accdfe029/08463bbe33fe4c35bf1459e5c5c6c464 [2021-11-07 01:31:31,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:31,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:31,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:31,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:31,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:31,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:31" (1/1) ... [2021-11-07 01:31:31,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c082f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:31, skipping insertion in model container [2021-11-07 01:31:31,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:31" (1/1) ... [2021-11-07 01:31:31,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:31,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:32,212 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_f879303f-7cef-4925-be1f-858066607a9f/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2021-11-07 01:31:32,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:32,238 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:31:32,271 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_f879303f-7cef-4925-be1f-858066607a9f/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2021-11-07 01:31:32,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:32,295 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:31:32,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32 WrapperNode [2021-11-07 01:31:32,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:32,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:32,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:31:32,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:31:32,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:32,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:31:32,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:31:32,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:31:32,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:31:32,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:31:32,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:31:32,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:31:32,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (1/1) ... [2021-11-07 01:31:32,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:32,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:31:32,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:31:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:31:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:31:32,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:31:32,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:31:32,837 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 01:31:32,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:32 BoogieIcfgContainer [2021-11-07 01:31:32,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:31:32,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:31:32,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:31:32,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:31:32,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:31" (1/3) ... [2021-11-07 01:31:32,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c41cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:32, skipping insertion in model container [2021-11-07 01:31:32,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:32" (2/3) ... [2021-11-07 01:31:32,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c41cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:32, skipping insertion in model container [2021-11-07 01:31:32,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:32" (3/3) ... [2021-11-07 01:31:32,847 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2021-11-07 01:31:32,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:31:32,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:31:32,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:31:32,954 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 [2021-11-07 01:31:32,954 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:31:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:31:32,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:32,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:32,987 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2021-11-07 01:31:33,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:33,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007348042] [2021-11-07 01:31:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:33,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:33,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:33,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:31:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:31:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:33,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:33,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:33,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007348042] [2021-11-07 01:31:33,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007348042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:33,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:33,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:31:33,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877744704] [2021-11-07 01:31:33,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:31:33,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:31:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:31:33,358 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-11-07 01:31:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:33,374 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-07 01:31:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:31:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2021-11-07 01:31:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:33,384 INFO L225 Difference]: With dead ends: 30 [2021-11-07 01:31:33,384 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 01:31:33,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:31:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 01:31:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 01:31:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-11-07 01:31:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-07 01:31:33,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2021-11-07 01:31:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:33,421 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-07 01:31:33,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-11-07 01:31:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-07 01:31:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:31:33,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:33,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:33,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:33,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:33,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2021-11-07 01:31:33,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:33,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075401752] [2021-11-07 01:31:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:33,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:33,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:33,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:33,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:31:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:31:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:34,084 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 18 treesize of output 14 [2021-11-07 01:31:34,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-07 01:31:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:34,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 56 [2021-11-07 01:31:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:34,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:34,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075401752] [2021-11-07 01:31:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075401752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:34,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:34,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-07 01:31:34,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130046403] [2021-11-07 01:31:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:31:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:31:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:31:34,590 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-07 01:31:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:36,009 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-07 01:31:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:31:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 16 [2021-11-07 01:31:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:36,013 INFO L225 Difference]: With dead ends: 71 [2021-11-07 01:31:36,013 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 01:31:36,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:31:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 01:31:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 21. [2021-11-07 01:31:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2021-11-07 01:31:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-07 01:31:36,030 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-11-07 01:31:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:36,031 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-07 01:31:36,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-07 01:31:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-07 01:31:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:31:36,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:36,038 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:36,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:36,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 1 times [2021-11-07 01:31:36,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:36,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967697583] [2021-11-07 01:31:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:36,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:36,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:36,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:31:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:31:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:36,543 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 18 treesize of output 14 [2021-11-07 01:31:36,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-07 01:31:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:36,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:37,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 56 [2021-11-07 01:31:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:37,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:37,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967697583] [2021-11-07 01:31:37,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967697583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:37,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922718705] [2021-11-07 01:31:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:37,202 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:37,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:37,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:31:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 01:31:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:37,819 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 44 treesize of output 40 [2021-11-07 01:31:38,706 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-07 01:31:38,707 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 44 treesize of output 21 [2021-11-07 01:31:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:38,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:39,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 156 [2021-11-07 01:31:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:39,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922718705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:39,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375571285] [2021-11-07 01:31:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:39,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:31:39,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:39,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:31:39,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:31:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 01:31:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:39,896 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 42 treesize of output 38 [2021-11-07 01:31:40,525 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-07 01:31:40,526 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 42 treesize of output 21 [2021-11-07 01:31:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:40,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:40,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-11-07 01:31:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:40,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375571285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:40,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:31:40,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 14, 13, 13] total 38 [2021-11-07 01:31:40,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925811885] [2021-11-07 01:31:40,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 01:31:40,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 01:31:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:31:40,966 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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) [2021-11-07 01:31:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:46,526 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2021-11-07 01:31:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 01:31:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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 20 [2021-11-07 01:31:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:46,528 INFO L225 Difference]: With dead ends: 103 [2021-11-07 01:31:46,528 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 01:31:46,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1535, Invalid=6837, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 01:31:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 01:31:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 29. [2021-11-07 01:31:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2021-11-07 01:31:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-07 01:31:46,541 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2021-11-07 01:31:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-07 01:31:46,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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) [2021-11-07 01:31:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-07 01:31:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:31:46,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:46,544 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:46,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 01:31:46,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:31:46,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:47,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:47,166 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:47,166 INFO L85 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 2 times [2021-11-07 01:31:47,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:47,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318884184] [2021-11-07 01:31:47,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:31:47,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:47,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:47,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:31:47,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:31:47,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:31:47,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:31:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:47,508 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 18 treesize of output 14 [2021-11-07 01:31:48,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-07 01:31:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:48,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:48,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-11-07 01:31:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:49,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:49,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318884184] [2021-11-07 01:31:49,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318884184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:49,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157579828] [2021-11-07 01:31:49,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:31:49,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:49,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:49,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:49,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:31:49,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:31:49,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:31:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 01:31:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:49,821 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 44 treesize of output 40 [2021-11-07 01:31:51,248 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-07 01:31:51,249 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 44 treesize of output 21 [2021-11-07 01:31:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:51,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:52,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 156 [2021-11-07 01:31:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:52,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1157579828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:52,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136040503] [2021-11-07 01:31:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:31:52,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:31:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:52,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:31:52,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:31:52,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:31:52,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:31:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 01:31:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:53,024 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 44 treesize of output 40 [2021-11-07 01:31:54,350 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-07 01:31:54,351 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 44 treesize of output 21 [2021-11-07 01:31:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 156 [2021-11-07 01:31:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:56,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136040503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:56,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:31:56,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18, 18, 20, 20] total 56 [2021-11-07 01:31:56,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755692742] [2021-11-07 01:31:56,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 01:31:56,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 01:31:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 01:31:56,135 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 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) [2021-11-07 01:32:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:21,145 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2021-11-07 01:32:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-07 01:32:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 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 28 [2021-11-07 01:32:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:21,149 INFO L225 Difference]: With dead ends: 187 [2021-11-07 01:32:21,149 INFO L226 Difference]: Without dead ends: 182 [2021-11-07 01:32:21,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10544 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=5099, Invalid=25003, Unknown=0, NotChecked=0, Total=30102 [2021-11-07 01:32:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-07 01:32:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 45. [2021-11-07 01:32:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 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) [2021-11-07 01:32:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-11-07 01:32:21,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2021-11-07 01:32:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:21,172 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-11-07 01:32:21,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 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) [2021-11-07 01:32:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-11-07 01:32:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:32:21,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:21,174 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:21,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:21,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:21,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:32:21,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:21,792 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:21,793 INFO L85 PathProgramCache]: Analyzing trace with hash 958970451, now seen corresponding path program 3 times [2021-11-07 01:32:21,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:21,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999755771] [2021-11-07 01:32:21,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:32:21,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:21,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:21,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:21,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:32:22,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-07 01:32:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-07 01:32:22,157 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:32:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:32:22,340 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-07 01:32:22,340 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:32:22,357 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:32:22,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:22,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,580 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-07 01:32:22,582 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:32:22,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:32:22 BoogieIcfgContainer [2021-11-07 01:32:22,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:32:22,654 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:32:22,654 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:32:22,654 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:32:22,654 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:32" (3/4) ... [2021-11-07 01:32:22,656 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:32:22,715 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:32:22,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:32:22,716 INFO L168 Benchmark]: Toolchain (without parser) took 50757.65 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 34.6 MB in the beginning and 50.0 MB in the end (delta: -15.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,716 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 56.6 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:32:22,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.97 ms. Allocated memory is still 56.6 MB. Free memory was 34.5 MB in the beginning and 23.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,717 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.99 ms. Allocated memory is still 56.6 MB. Free memory was 23.9 MB in the beginning and 39.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,718 INFO L168 Benchmark]: Boogie Preprocessor took 54.20 ms. Allocated memory is still 56.6 MB. Free memory was 39.8 MB in the beginning and 38.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,718 INFO L168 Benchmark]: RCFGBuilder took 409.51 ms. Allocated memory is still 56.6 MB. Free memory was 38.3 MB in the beginning and 26.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,719 INFO L168 Benchmark]: TraceAbstraction took 49812.45 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 26.1 MB in the beginning and 54.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 40.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,719 INFO L168 Benchmark]: Witness Printer took 61.46 ms. Allocated memory is still 88.1 MB. Free memory was 54.2 MB in the beginning and 50.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:22,721 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 56.6 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.97 ms. Allocated memory is still 56.6 MB. Free memory was 34.5 MB in the beginning and 23.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.99 ms. Allocated memory is still 56.6 MB. Free memory was 23.9 MB in the beginning and 39.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.20 ms. Allocated memory is still 56.6 MB. Free memory was 39.8 MB in the beginning and 38.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 409.51 ms. Allocated memory is still 56.6 MB. Free memory was 38.3 MB in the beginning and 26.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 49812.45 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 26.1 MB in the beginning and 54.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 40.5 MB. Max. memory is 16.1 GB. * Witness Printer took 61.46 ms. Allocated memory is still 88.1 MB. Free memory was 54.2 MB in the beginning and 50.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] struct dummy d1, d2; VAL [d1={10:0}, d2={3:0}] [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={10:0}, d2={3:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={10:0}, d2={3:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={10:0}, d2={3:0}] [L42] EXPR \read(*pa) VAL [d1={10:0}, d2={3:0}] [L42] COND FALSE !(i <= *pa) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] COND TRUE !check(pd2, i) [L52] reach_error() VAL [d1={10:0}, d2={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 49.6s, OverallIterations: 5, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 32.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 993 SDslu, 331 SDs, 0 SdLazy, 1087 SolverSat, 652 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 527 GetRequests, 222 SyntacticMatches, 12 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13388 ImplicationChecksByTransitivity, 33.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 213, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 251 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 213 NumberOfCodeBlocks, 213 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 334 ConstructedInterpolants, 36 QuantifiedInterpolants, 4174 SizeOfPredicates, 92 NumberOfNonLiveVariables, 615 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 0/288 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! [2021-11-07 01:32:22,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f879303f-7cef-4925-be1f-858066607a9f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE