./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fabc9d8a61dd824da0c561a6d62c57fe8eb320f6ad8009599cd12699fa04e01c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:15:44,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:15:44,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:15:44,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:15:44,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:15:44,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:15:44,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:15:44,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:15:44,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:15:44,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:15:44,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:15:44,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:15:44,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:15:44,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:15:44,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:15:44,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:15:44,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:15:44,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:15:44,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:15:44,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:15:44,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:15:44,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:15:44,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:15:44,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:15:44,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:15:44,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:15:44,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:15:44,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:15:44,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:15:44,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:15:44,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:15:44,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:15:44,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:15:44,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:15:44,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:15:44,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:15:44,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:15:44,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:15:44,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:15:44,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:15:44,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:15:44,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2021-10-24 11:15:44,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:15:44,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:15:44,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:15:44,502 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:15:44,502 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:15:44,503 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:15:44,503 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:15:44,503 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:15:44,503 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:15:44,504 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:15:44,504 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:15:44,504 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:15:44,505 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:15:44,505 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:15:44,505 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:15:44,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 11:15:44,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 11:15:44,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:15:44,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 11:15:44,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:15:44,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:15:44,507 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 11:15:44,508 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 11:15:44,508 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 11:15:44,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:15:44,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:15:44,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:15:44,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:15:44,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:15:44,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:15:44,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:15:44,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:15:44,510 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:15:44,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:15:44,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:15:44,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:15:44,511 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_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabc9d8a61dd824da0c561a6d62c57fe8eb320f6ad8009599cd12699fa04e01c [2021-10-24 11:15:44,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:15:44,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:15:44,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:15:44,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:15:44,851 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:15:44,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2021-10-24 11:15:44,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/data/5ab20231d/ccb28b2bfbdf4d12ac583e855cc5b84e/FLAGf583b1503 [2021-10-24 11:15:45,393 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:15:45,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2021-10-24 11:15:45,398 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/data/5ab20231d/ccb28b2bfbdf4d12ac583e855cc5b84e/FLAGf583b1503 [2021-10-24 11:15:45,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/data/5ab20231d/ccb28b2bfbdf4d12ac583e855cc5b84e [2021-10-24 11:15:45,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:15:45,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:15:45,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:15:45,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:15:45,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:15:45,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:15:45" (1/1) ... [2021-10-24 11:15:45,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0e73ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:45, skipping insertion in model container [2021-10-24 11:15:45,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:15:45" (1/1) ... [2021-10-24 11:15:45,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:15:45,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:15:45,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:15:45,968 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:15:45,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:15:46,019 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:15:46,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46 WrapperNode [2021-10-24 11:15:46,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:15:46,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:15:46,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:15:46,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:15:46,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:15:46,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:15:46,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:15:46,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:15:46,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:15:46,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:15:46,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:15:46,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:15:46,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (1/1) ... [2021-10-24 11:15:46,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:15:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:15:46,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:15:46,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:15:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 11:15:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:15:46,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:15:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 11:15:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:15:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:15:46,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:15:46,392 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-24 11:15:46,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:15:46 BoogieIcfgContainer [2021-10-24 11:15:46,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:15:46,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:15:46,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:15:46,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:15:46,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:15:45" (1/3) ... [2021-10-24 11:15:46,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d94e57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:15:46, skipping insertion in model container [2021-10-24 11:15:46,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:15:46" (2/3) ... [2021-10-24 11:15:46,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d94e57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:15:46, skipping insertion in model container [2021-10-24 11:15:46,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:15:46" (3/3) ... [2021-10-24 11:15:46,410 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2021-10-24 11:15:46,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:15:46,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-24 11:15:46,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:15:46,524 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 11:15:46,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-24 11:15:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-24 11:15:46,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:46,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-24 11:15:46,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash 80085, now seen corresponding path program 1 times [2021-10-24 11:15:46,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:46,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865629978] [2021-10-24 11:15:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:46,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:46,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:46,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865629978] [2021-10-24 11:15:46,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865629978] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:15:46,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:15:46,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 11:15:46,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715590411] [2021-10-24 11:15:46,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:15:46,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:15:46,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:15:46,841 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:46,879 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-24 11:15:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:15:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-24 11:15:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:46,888 INFO L225 Difference]: With dead ends: 15 [2021-10-24 11:15:46,889 INFO L226 Difference]: Without dead ends: 14 [2021-10-24 11:15:46,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:15:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-24 11:15:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-24 11:15:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.6) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-24 11:15:46,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2021-10-24 11:15:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:46,921 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-24 11:15:46,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-24 11:15:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-24 11:15:46,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:46,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-24 11:15:46,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:15:46,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:46,924 INFO L82 PathProgramCache]: Analyzing trace with hash 80086, now seen corresponding path program 1 times [2021-10-24 11:15:46,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:46,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880295583] [2021-10-24 11:15:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:46,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:46,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:46,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880295583] [2021-10-24 11:15:46,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880295583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:15:46,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:15:46,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 11:15:46,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439251721] [2021-10-24 11:15:46,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:15:46,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:15:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:15:46,992 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:47,034 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-24 11:15:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:15:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-24 11:15:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:47,036 INFO L225 Difference]: With dead ends: 16 [2021-10-24 11:15:47,038 INFO L226 Difference]: Without dead ends: 16 [2021-10-24 11:15:47,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:15:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-24 11:15:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-24 11:15:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-24 11:15:47,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 3 [2021-10-24 11:15:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:47,051 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-24 11:15:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-24 11:15:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 11:15:47,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:47,053 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-24 11:15:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:15:47,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash 77001409, now seen corresponding path program 1 times [2021-10-24 11:15:47,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:47,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058270607] [2021-10-24 11:15:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:47,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:47,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:47,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058270607] [2021-10-24 11:15:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058270607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:15:47,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45828198] [2021-10-24 11:15:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:47,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:15:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:15:47,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:15:47,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:15:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 11:15:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:15:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-24 11:15:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:47,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:15:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:47,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45828198] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:15:47,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925091460] [2021-10-24 11:15:47,573 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-24 11:15:47,573 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:15:47,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:15:47,589 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:15:47,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:15:47,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,637 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:47,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-24 11:15:47,645 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:47,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-24 11:15:47,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-24 11:15:47,675 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 3=[|v_#valid_27|]} [2021-10-24 11:15:47,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:15:47,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:47,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:47,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:47,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:47,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:15:47,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2021-10-24 11:15:47,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:15:47,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:15:47,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:47,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:47,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 11:15:47,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:47,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:60, output treesize:56 [2021-10-24 11:15:47,813 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.1 percent of original size [2021-10-24 11:15:47,830 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:47,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,834 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:47,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 11:15:47,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:47,838 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:47,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-24 11:15:47,845 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.6 percent of original size 84 [2021-10-24 11:15:47,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:15:47,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-10-24 11:15:47,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-10-24 11:15:47,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:47,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:47,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:47,918 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size [2021-10-24 11:15:47,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-10-24 11:15:47,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:47,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:79 [2021-10-24 11:15:47,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:47,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:47,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,059 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.2 percent of original size [2021-10-24 11:15:48,083 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,090 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,098 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,105 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:48,110 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 11:15:48,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-24 11:15:48,119 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 141 [2021-10-24 11:15:48,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 142 [2021-10-24 11:15:48,132 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,137 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:48,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-24 11:15:48,144 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,153 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,154 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:48,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:48,159 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:48,171 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,176 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 11:15:48,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 11:15:48,179 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,183 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:48,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-24 11:15:48,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 11:15:48,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-10-24 11:15:48,198 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-24 11:15:48,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 207 [2021-10-24 11:15:48,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:48,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:48,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:48,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:48,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:15:48,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-10-24 11:15:48,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-10-24 11:15:48,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-10-24 11:15:48,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:48,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,301 INFO L180 QuantifierPusher]: treesize reduction 52, result has 80.5 percent of original size [2021-10-24 11:15:48,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 226 [2021-10-24 11:15:48,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-10-24 11:15:48,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:274, output treesize:226 [2021-10-24 11:15:48,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,391 INFO L180 QuantifierPusher]: treesize reduction 18, result has 81.3 percent of original size [2021-10-24 11:15:48,400 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,402 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:48,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:48,404 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:48,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:48,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:48,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:48,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:48,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:48,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:48,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:74 [2021-10-24 11:15:48,444 INFO L180 QuantifierPusher]: treesize reduction 18, result has 81.3 percent of original size [2021-10-24 11:15:48,456 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,457 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:48,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:48,461 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:48,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:48,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:48,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:48,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:48,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:48,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:48,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:48,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:48,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:48,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:74 [2021-10-24 11:15:48,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:48,547 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:15:48,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:15:48,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:15:48,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2021-10-24 11:15:48,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547892337] [2021-10-24 11:15:48,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:15:48,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:15:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:15:48,866 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:48,970 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-24 11:15:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:15:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 11:15:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:48,973 INFO L225 Difference]: With dead ends: 20 [2021-10-24 11:15:48,973 INFO L226 Difference]: Without dead ends: 20 [2021-10-24 11:15:48,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:15:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-24 11:15:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-24 11:15:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-24 11:15:48,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 5 [2021-10-24 11:15:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:48,981 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-24 11:15:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-24 11:15:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 11:15:48,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:48,983 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-24 11:15:49,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:15:49,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:15:49,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash -933712638, now seen corresponding path program 1 times [2021-10-24 11:15:49,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:49,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347906188] [2021-10-24 11:15:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:49,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 11:15:49,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:49,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347906188] [2021-10-24 11:15:49,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347906188] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:15:49,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:15:49,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:15:49,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111545552] [2021-10-24 11:15:49,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:15:49,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:15:49,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:15:49,335 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 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) [2021-10-24 11:15:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:49,404 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-10-24 11:15:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:15:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 13 [2021-10-24 11:15:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:49,409 INFO L225 Difference]: With dead ends: 23 [2021-10-24 11:15:49,409 INFO L226 Difference]: Without dead ends: 23 [2021-10-24 11:15:49,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:15:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-24 11:15:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-10-24 11:15:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-10-24 11:15:49,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-10-24 11:15:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:49,419 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-24 11:15:49,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2021-10-24 11:15:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-10-24 11:15:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:15:49,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:49,421 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-10-24 11:15:49,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-24 11:15:49,422 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1119685380, now seen corresponding path program 1 times [2021-10-24 11:15:49,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:49,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760887095] [2021-10-24 11:15:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:49,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 11:15:49,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:49,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760887095] [2021-10-24 11:15:49,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760887095] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:15:49,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:15:49,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:15:49,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949717468] [2021-10-24 11:15:49,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:15:49,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:15:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:15:49,482 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:49,498 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-24 11:15:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:15:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 11:15:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:49,501 INFO L225 Difference]: With dead ends: 20 [2021-10-24 11:15:49,501 INFO L226 Difference]: Without dead ends: 20 [2021-10-24 11:15:49,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:15:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-24 11:15:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-24 11:15:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-24 11:15:49,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2021-10-24 11:15:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:49,509 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-24 11:15:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-24 11:15:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 11:15:49,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:49,511 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:15:49,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-24 11:15:49,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:49,512 INFO L82 PathProgramCache]: Analyzing trace with hash 350506661, now seen corresponding path program 1 times [2021-10-24 11:15:49,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:49,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634881701] [2021-10-24 11:15:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:49,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:49,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:49,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634881701] [2021-10-24 11:15:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634881701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:15:49,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453801025] [2021-10-24 11:15:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:49,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:15:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:15:49,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:15:49,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 11:15:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:15:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:15:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:49,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:15:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:15:49,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453801025] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:15:49,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7943896] [2021-10-24 11:15:49,808 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-24 11:15:49,808 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:15:49,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:15:49,809 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:15:49,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:15:49,827 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,827 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-24 11:15:49,829 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-24 11:15:49,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-24 11:15:49,837 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 3=[|v_#valid_29|]} [2021-10-24 11:15:49,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:15:49,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:49,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:49,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:49,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:49,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:15:49,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2021-10-24 11:15:49,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:15:49,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 11:15:49,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:49,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:49,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 11:15:49,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:49,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:60, output treesize:56 [2021-10-24 11:15:49,876 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.1 percent of original size [2021-10-24 11:15:49,886 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,887 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:49,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:49,890 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:49,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-24 11:15:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:49,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:49,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:49,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:49,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:49,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-24 11:15:49,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:49,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:100 [2021-10-24 11:15:49,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:49,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:49,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:49,978 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.5 percent of original size [2021-10-24 11:15:49,991 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,995 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,996 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,998 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:49,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:49,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:49,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:50,000 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:50,005 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,007 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,008 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-24 11:15:50,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-24 11:15:50,011 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,015 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:50,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-24 11:15:50,019 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-24 11:15:50,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 197 [2021-10-24 11:15:50,027 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-10-24 11:15:50,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-10-24 11:15:50,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:50,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:15:50,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-10-24 11:15:50,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-24 11:15:50,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-24 11:15:50,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,115 INFO L180 QuantifierPusher]: treesize reduction 70, result has 75.7 percent of original size [2021-10-24 11:15:50,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 229 [2021-10-24 11:15:50,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-10-24 11:15:50,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:295, output treesize:229 [2021-10-24 11:15:50,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,167 INFO L180 QuantifierPusher]: treesize reduction 18, result has 81.3 percent of original size [2021-10-24 11:15:50,173 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,174 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:50,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:50,177 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:50,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:50,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:50,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:74 [2021-10-24 11:15:50,202 INFO L180 QuantifierPusher]: treesize reduction 18, result has 81.3 percent of original size [2021-10-24 11:15:50,206 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,207 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:15:50,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:50,210 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:15:50,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-24 11:15:50,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,228 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-24 11:15:50,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:74 [2021-10-24 11:15:50,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-10-24 11:15:50,299 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,301 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 209 [2021-10-24 11:15:50,323 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,331 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,332 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:50,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-24 11:15:50,334 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,336 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,341 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,343 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,347 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 11:15:50,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-24 11:15:50,351 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 11:15:50,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-24 11:15:50,358 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,361 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,363 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,364 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 11:15:50,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-24 11:15:50,369 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,371 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 11:15:50,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 11:15:50,374 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-24 11:15:50,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-24 11:15:50,379 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 11:15:50,394 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,395 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,396 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-10-24 11:15:50,403 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,406 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,410 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:15:50,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-10-24 11:15:50,413 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-24 11:15:50,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-24 11:15:50,418 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-24 11:15:50,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-10-24 11:15:50,424 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 216 [2021-10-24 11:15:50,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-10-24 11:15:50,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-24 11:15:50,454 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-24 11:15:50,464 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-10-24 11:15:50,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:50,480 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:50,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-24 11:15:50,490 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-24 11:15:50,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-24 11:15:50,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-24 11:15:50,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 11:15:50,519 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-10-24 11:15:50,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:50,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-24 11:15:50,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-10-24 11:15:50,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:15:50,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,541 INFO L180 QuantifierPusher]: treesize reduction 42, result has 76.4 percent of original size [2021-10-24 11:15:50,544 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:15:50,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:15:50,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-24 11:15:50,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-24 11:15:50,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-10-24 11:15:50,549 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:759, output treesize:135 [2021-10-24 11:15:50,558 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:15:51,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:15:51,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:15:51,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-10-24 11:15:51,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485879912] [2021-10-24 11:15:51,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 11:15:51,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 11:15:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-24 11:15:51,412 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:51,453 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-10-24 11:15:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:15:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-24 11:15:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:51,455 INFO L225 Difference]: With dead ends: 32 [2021-10-24 11:15:51,455 INFO L226 Difference]: Without dead ends: 32 [2021-10-24 11:15:51,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-24 11:15:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-24 11:15:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-24 11:15:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-10-24 11:15:51,459 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2021-10-24 11:15:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-10-24 11:15:51,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-10-24 11:15:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 11:15:51,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:51,460 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:15:51,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:15:51,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-24 11:15:51,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1968503271, now seen corresponding path program 2 times [2021-10-24 11:15:51,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:51,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632032302] [2021-10-24 11:15:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:51,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:15:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-24 11:15:51,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:15:51,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632032302] [2021-10-24 11:15:51,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632032302] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:15:51,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:15:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:15:51,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350867035] [2021-10-24 11:15:51,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:15:51,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:15:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:15:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:15:51,788 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:15:51,806 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-24 11:15:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:15:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-24 11:15:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:15:51,811 INFO L225 Difference]: With dead ends: 31 [2021-10-24 11:15:51,811 INFO L226 Difference]: Without dead ends: 28 [2021-10-24 11:15:51,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:15:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-24 11:15:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-24 11:15:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-24 11:15:51,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 27 [2021-10-24 11:15:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:15:51,818 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-24 11:15:51,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:15:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-24 11:15:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 11:15:51,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:15:51,820 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:15:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-10-24 11:15:51,820 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-24 11:15:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:15:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1968337756, now seen corresponding path program 1 times [2021-10-24 11:15:51,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:15:51,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235825723] [2021-10-24 11:15:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:15:51,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:15:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:15:51,862 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:15:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:15:51,931 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 11:15:51,931 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:15:51,932 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-24 11:15:51,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-24 11:15:51,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-24 11:15:51,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-24 11:15:51,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 11:15:51,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 11:15:51,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 11:15:51,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-10-24 11:15:51,941 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:15:51,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:15:51 BoogieIcfgContainer [2021-10-24 11:15:51,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:15:51,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:15:51,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:15:51,969 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:15:51,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:15:46" (3/4) ... [2021-10-24 11:15:51,971 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 11:15:52,021 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:15:52,022 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:15:52,023 INFO L168 Benchmark]: Toolchain (without parser) took 6229.22 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 57.8 MB in the beginning and 95.5 MB in the end (delta: -37.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:15:52,023 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 24.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:15:52,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.91 ms. Allocated memory is still 92.3 MB. Free memory was 57.7 MB in the beginning and 70.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:15:52,023 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.02 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:15:52,024 INFO L168 Benchmark]: Boogie Preprocessor took 22.41 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.7 MB in the end (delta: 879.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:15:52,024 INFO L168 Benchmark]: RCFGBuilder took 320.28 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 56.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:15:52,024 INFO L168 Benchmark]: TraceAbstraction took 5571.69 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 56.1 MB in the beginning and 97.6 MB in the end (delta: -41.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:15:52,030 INFO L168 Benchmark]: Witness Printer took 53.11 ms. Allocated memory is still 146.8 MB. Free memory was 97.6 MB in the beginning and 95.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:15:52,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 24.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 225.91 ms. Allocated memory is still 92.3 MB. Free memory was 57.7 MB in the beginning and 70.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.02 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.41 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.7 MB in the end (delta: 879.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 320.28 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 56.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5571.69 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 56.1 MB in the beginning and 97.6 MB in the end (delta: -41.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. * Witness Printer took 53.11 ms. Allocated memory is still 146.8 MB. Free memory was 97.6 MB in the beginning and 95.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND FALSE !(n < 10) [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] EXPR a[i] [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 9]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 5440.1ms, OverallIterations: 8, TraceHistogramMax: 10, EmptinessCheckTime: 15.8ms, AutomataDifference: 393.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 73 SDtfs, 56 SDslu, 70 SDs, 0 SdLazy, 131 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 174.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1410.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=6, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 42.4ms SsaConstructionTime, 246.7ms SatisfiabilityAnalysisTime, 926.4ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 593 SizeOfPredicates, 0 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 132/186 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 11:15:52,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd303e3-d8cc-42e7-9770-fb8b4c4bc1d6/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...