./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI --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 32bit --witnessprinter.graph.data.programhash e872a0dffbf376eb2d8b1e3516401a8dafe115a6 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-7b2dab5 [2021-10-11 02:21:07,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:07,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:08,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:08,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:08,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:08,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:08,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:08,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:08,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:08,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:08,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:08,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:08,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:08,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:08,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:08,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:08,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:08,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:08,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:08,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:08,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:08,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:08,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:08,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:08,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:08,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:08,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:08,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:08,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:08,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:08,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:08,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:08,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:08,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:08,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:08,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:08,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:08,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:08,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:08,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:08,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:21:08,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:08,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:08,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:08,128 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:08,128 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:08,128 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:08,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:21:08,129 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:08,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:08,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:21:08,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:21:08,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:08,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:21:08,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:21:08,131 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:21:08,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:21:08,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:21:08,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:08,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:08,133 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:21:08,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:21:08,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:08,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:08,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:21:08,134 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:21:08,134 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:21:08,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:08,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:08,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:08,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:08,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:08,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:08,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:08,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:08,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:08,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:21:08,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:21:08,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:08,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:08,139 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_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2021-10-11 02:21:08,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:08,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:08,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:08,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:08,466 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:08,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-11 02:21:08,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/data/7dd451c5f/0087a4eb91ff45adbe26b5cffabbfc58/FLAG2bf1b22bd [2021-10-11 02:21:09,046 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:09,048 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-11 02:21:09,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/data/7dd451c5f/0087a4eb91ff45adbe26b5cffabbfc58/FLAG2bf1b22bd [2021-10-11 02:21:09,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/data/7dd451c5f/0087a4eb91ff45adbe26b5cffabbfc58 [2021-10-11 02:21:09,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:09,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:09,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:09,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:09,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:09,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6724bd27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09, skipping insertion in model container [2021-10-11 02:21:09,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:09,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:09,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:09,663 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:09,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:09,700 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:09,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09 WrapperNode [2021-10-11 02:21:09,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:09,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:09,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:09,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:09,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:09,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:09,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:09,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:09,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... [2021-10-11 02:21:09,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:09,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:09,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:09,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:09,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:21:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:09,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:21:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:21:10,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:10,293 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:21:10,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:10 BoogieIcfgContainer [2021-10-11 02:21:10,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:10,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:10,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:10,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:10,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:09" (1/3) ... [2021-10-11 02:21:10,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6921b82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:10, skipping insertion in model container [2021-10-11 02:21:10,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:09" (2/3) ... [2021-10-11 02:21:10,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6921b82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:10, skipping insertion in model container [2021-10-11 02:21:10,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:10" (3/3) ... [2021-10-11 02:21:10,320 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-10-11 02:21:10,334 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:10,337 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2021-10-11 02:21:10,348 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-11 02:21:10,368 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:10,372 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:21:10,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:10,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:10,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:10,373 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:10,373 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:10,373 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-10-11 02:21:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:21:10,392 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:10,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:21:10,393 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 81046, now seen corresponding path program 1 times [2021-10-11 02:21:10,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:10,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643917648] [2021-10-11 02:21:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:10,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643917648] [2021-10-11 02:21:10,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:10,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:21:10,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635151631] [2021-10-11 02:21:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:10,647 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-10-11 02:21:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:10,712 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-11 02:21:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:10,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:21:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:10,730 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:21:10,730 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:21:10,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:21:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-11 02:21:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:21:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-11 02:21:10,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2021-10-11 02:21:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:10,766 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-11 02:21:10,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-11 02:21:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:21:10,766 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:10,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:21:10,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:21:10,768 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 81047, now seen corresponding path program 1 times [2021-10-11 02:21:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:10,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388707173] [2021-10-11 02:21:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:10,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388707173] [2021-10-11 02:21:10,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:10,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:21:10,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662732206] [2021-10-11 02:21:10,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:10,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:10,885 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2021-10-11 02:21:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:10,926 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-11 02:21:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:10,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:21:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:10,928 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:21:10,928 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:21:10,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:21:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 02:21:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:21:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-11 02:21:10,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2021-10-11 02:21:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:10,937 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-11 02:21:10,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-11 02:21:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:21:10,937 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:10,938 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:21:10,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:21:10,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash 77927813, now seen corresponding path program 1 times [2021-10-11 02:21:10,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:10,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680581064] [2021-10-11 02:21:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:11,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680581064] [2021-10-11 02:21:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959188501] [2021-10-11 02:21:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:21:11,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:11,163 INFO L382 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 [2021-10-11 02:21:11,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:21:11,173 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:21:11,174 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:21:11,174 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:21:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:11,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:11,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136791594] [2021-10-11 02:21:11,250 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:21:11,251 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:11,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:11,260 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:11,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:11,646 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:11,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:11,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:11,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:21:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786402858] [2021-10-11 02:21:11,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:21:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:21:11,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:21:11,828 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2021-10-11 02:21:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:11,942 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-11 02:21:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:21:11,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:21:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:11,945 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:21:11,945 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:21:11,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:21:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:21:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 02:21:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:21:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-11 02:21:11,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2021-10-11 02:21:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:11,950 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-11 02:21:11,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:21:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-11 02:21:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:21:11,950 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:11,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:21:12,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:21:12,167 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2028487428, now seen corresponding path program 1 times [2021-10-11 02:21:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611307405] [2021-10-11 02:21:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:21:12,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611307405] [2021-10-11 02:21:12,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:12,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:12,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654121167] [2021-10-11 02:21:12,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:12,199 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 3 states. [2021-10-11 02:21:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:12,220 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-10-11 02:21:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:12,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:21:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:12,221 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:21:12,221 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:21:12,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:21:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-10-11 02:21:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:21:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-11 02:21:12,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 8 [2021-10-11 02:21:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:12,226 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-11 02:21:12,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-11 02:21:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:21:12,226 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:12,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:21:12,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-11 02:21:12,227 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2028488527, now seen corresponding path program 1 times [2021-10-11 02:21:12,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:12,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810358546] [2021-10-11 02:21:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:12,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810358546] [2021-10-11 02:21:12,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668349423] [2021-10-11 02:21:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:21:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:12,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049442746] [2021-10-11 02:21:12,395 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:21:12,395 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:12,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:12,396 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:12,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:12,599 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:12,713 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-10-11 02:21:12,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:12,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:12,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-10-11 02:21:12,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215864769] [2021-10-11 02:21:12,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:21:12,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:21:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:12,912 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2021-10-11 02:21:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:12,958 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-11 02:21:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:21:12,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2021-10-11 02:21:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:12,961 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:21:12,961 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:21:12,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:21:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-11 02:21:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:21:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-11 02:21:12,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 8 [2021-10-11 02:21:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:12,976 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-11 02:21:12,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:21:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-11 02:21:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:21:12,978 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:12,978 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:21:13,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:13,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1976235185, now seen corresponding path program 2 times [2021-10-11 02:21:13,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:13,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143187991] [2021-10-11 02:21:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:13,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143187991] [2021-10-11 02:21:13,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220543857] [2021-10-11 02:21:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:13,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:21:13,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:21:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:21:13,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:21:13,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:21:13,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2021-10-11 02:21:13,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389139394] [2021-10-11 02:21:13,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:21:13,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:21:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:21:13,553 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2021-10-11 02:21:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:13,584 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-11 02:21:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:21:13,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-10-11 02:21:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:13,585 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:21:13,585 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 02:21:13,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:21:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 02:21:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-11 02:21:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:21:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-11 02:21:13,589 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 11 [2021-10-11 02:21:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:13,589 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-11 02:21:13,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:21:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-11 02:21:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:21:13,590 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:13,590 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2021-10-11 02:21:13,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-11 02:21:13,815 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash 621829369, now seen corresponding path program 2 times [2021-10-11 02:21:13,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:13,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846130402] [2021-10-11 02:21:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846130402] [2021-10-11 02:21:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114180986] [2021-10-11 02:21:13,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:13,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:21:13,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 02:21:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:21:14,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:21:14,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:21:14,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2021-10-11 02:21:14,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789493857] [2021-10-11 02:21:14,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:21:14,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:21:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:14,231 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2021-10-11 02:21:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:14,325 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-11 02:21:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:21:14,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-10-11 02:21:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:14,329 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:21:14,329 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 02:21:14,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:21:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 02:21:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-10-11 02:21:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:21:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-10-11 02:21:14,336 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2021-10-11 02:21:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:14,336 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-10-11 02:21:14,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:21:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-10-11 02:21:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:21:14,337 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:14,337 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2021-10-11 02:21:14,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:14,563 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash 621829368, now seen corresponding path program 1 times [2021-10-11 02:21:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:14,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567115617] [2021-10-11 02:21:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:14,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567115617] [2021-10-11 02:21:14,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354523646] [2021-10-11 02:21:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:21:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:14,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:14,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684387669] [2021-10-11 02:21:14,803 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:21:14,803 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:14,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:14,804 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:14,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:15,005 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:15,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:15,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:15,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2021-10-11 02:21:15,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063827699] [2021-10-11 02:21:15,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:21:15,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:21:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:21:15,299 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 13 states. [2021-10-11 02:21:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:15,348 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-11 02:21:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:21:15,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-10-11 02:21:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:15,352 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:21:15,352 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:21:15,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:21:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:21:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-11 02:21:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-11 02:21:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-11 02:21:15,356 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2021-10-11 02:21:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:15,356 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-11 02:21:15,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:21:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-11 02:21:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:21:15,357 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:15,358 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2021-10-11 02:21:15,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-11 02:21:15,579 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash -714852032, now seen corresponding path program 2 times [2021-10-11 02:21:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:15,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722894803] [2021-10-11 02:21:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722894803] [2021-10-11 02:21:15,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:15,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:15,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201855566] [2021-10-11 02:21:15,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:15,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:15,656 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2021-10-11 02:21:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:15,688 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-10-11 02:21:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:21:15,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-10-11 02:21:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:15,692 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:21:15,692 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:21:15,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:21:15,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-11 02:21:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:21:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-10-11 02:21:15,704 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2021-10-11 02:21:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:15,705 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-10-11 02:21:15,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-10-11 02:21:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:21:15,706 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:15,707 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2021-10-11 02:21:15,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-10-11 02:21:15,707 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash -685576509, now seen corresponding path program 1 times [2021-10-11 02:21:15,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:15,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891421661] [2021-10-11 02:21:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:15,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891421661] [2021-10-11 02:21:15,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:15,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865480554] [2021-10-11 02:21:15,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:15,771 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 3 states. [2021-10-11 02:21:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:15,786 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-11 02:21:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:15,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-10-11 02:21:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:15,789 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:21:15,789 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:21:15,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:21:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-11 02:21:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 02:21:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-10-11 02:21:15,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2021-10-11 02:21:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:15,804 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-10-11 02:21:15,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-10-11 02:21:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:21:15,805 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:15,805 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2021-10-11 02:21:15,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-10-11 02:21:15,805 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:15,806 INFO L82 PathProgramCache]: Analyzing trace with hash -685576508, now seen corresponding path program 1 times [2021-10-11 02:21:15,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:15,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879758151] [2021-10-11 02:21:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:15,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879758151] [2021-10-11 02:21:15,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:15,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:15,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370302225] [2021-10-11 02:21:15,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:15,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:15,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:15,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:15,886 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2021-10-11 02:21:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:15,915 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-10-11 02:21:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:15,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-10-11 02:21:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:15,918 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:21:15,918 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:21:15,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:21:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-11 02:21:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 02:21:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-10-11 02:21:15,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 25 [2021-10-11 02:21:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:15,923 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-10-11 02:21:15,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-10-11 02:21:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 02:21:15,924 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:15,924 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:15,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-10-11 02:21:15,925 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1709004728, now seen corresponding path program 1 times [2021-10-11 02:21:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354299142] [2021-10-11 02:21:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:15,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354299142] [2021-10-11 02:21:15,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688319475] [2021-10-11 02:21:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:21:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:16,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390206150] [2021-10-11 02:21:16,093 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:21:16,093 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:16,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:16,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:16,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:16,542 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:17,056 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-10-11 02:21:17,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:17,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:17,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:21:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297603595] [2021-10-11 02:21:17,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:21:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:21:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:17,059 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2021-10-11 02:21:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:17,109 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-10-11 02:21:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:21:17,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-10-11 02:21:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:17,111 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:21:17,111 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:21:17,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:21:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-10-11 02:21:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-11 02:21:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-10-11 02:21:17,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2021-10-11 02:21:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:17,118 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-10-11 02:21:17,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:21:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-10-11 02:21:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 02:21:17,121 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:17,121 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2021-10-11 02:21:17,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:17,335 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1439573112, now seen corresponding path program 1 times [2021-10-11 02:21:17,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:17,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099724577] [2021-10-11 02:21:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:17,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099724577] [2021-10-11 02:21:17,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182449903] [2021-10-11 02:21:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:21:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:17,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:17,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338261350] [2021-10-11 02:21:17,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:21:17,559 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:17,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:17,559 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:17,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:17,940 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:18,092 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-10-11 02:21:18,513 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-10-11 02:21:18,514 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:18,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:18,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-10-11 02:21:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602671489] [2021-10-11 02:21:18,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:21:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:21:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:21:18,516 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 6 states. [2021-10-11 02:21:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:18,598 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-11 02:21:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:21:18,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-10-11 02:21:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:18,600 INFO L225 Difference]: With dead ends: 46 [2021-10-11 02:21:18,600 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 02:21:18,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 02:21:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-10-11 02:21:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 02:21:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-11 02:21:18,614 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 28 [2021-10-11 02:21:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:18,617 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-11 02:21:18,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:21:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-11 02:21:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:21:18,619 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:18,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1] [2021-10-11 02:21:18,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:18,820 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash -450269247, now seen corresponding path program 1 times [2021-10-11 02:21:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:18,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994652043] [2021-10-11 02:21:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-11 02:21:18,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994652043] [2021-10-11 02:21:18,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472341085] [2021-10-11 02:21:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-11 02:21:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:19,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 100 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:20,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576899011] [2021-10-11 02:21:20,154 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:21:20,154 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:20,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:20,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:20,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:20,499 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:21,035 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-10-11 02:21:21,036 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:21,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:21,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 29 [2021-10-11 02:21:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187126266] [2021-10-11 02:21:21,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-10-11 02:21:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-11 02:21:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2021-10-11 02:21:21,039 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 31 states. [2021-10-11 02:21:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:21,939 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-10-11 02:21:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-11 02:21:21,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2021-10-11 02:21:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:21,940 INFO L225 Difference]: With dead ends: 60 [2021-10-11 02:21:21,941 INFO L226 Difference]: Without dead ends: 60 [2021-10-11 02:21:21,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=953, Invalid=2127, Unknown=0, NotChecked=0, Total=3080 [2021-10-11 02:21:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-11 02:21:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-10-11 02:21:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 02:21:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-10-11 02:21:21,944 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2021-10-11 02:21:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:21,945 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-10-11 02:21:21,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-10-11 02:21:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-10-11 02:21:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-11 02:21:21,946 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:21,946 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1] [2021-10-11 02:21:22,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-10-11 02:21:22,171 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1355532940, now seen corresponding path program 2 times [2021-10-11 02:21:22,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:22,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689415732] [2021-10-11 02:21:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689415732] [2021-10-11 02:21:22,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765371434] [2021-10-11 02:21:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:22,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-11 02:21:22,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:21:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:22,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:21:22,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285589939] [2021-10-11 02:21:22,437 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:21:22,437 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:22,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:22,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:22,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:22,817 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:23,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:23,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:23,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-10-11 02:21:23,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340233289] [2021-10-11 02:21:23,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:21:23,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:23,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:21:23,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:21:23,288 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 13 states. [2021-10-11 02:21:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:23,379 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-10-11 02:21:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:21:23,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2021-10-11 02:21:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:23,380 INFO L225 Difference]: With dead ends: 68 [2021-10-11 02:21:23,380 INFO L226 Difference]: Without dead ends: 68 [2021-10-11 02:21:23,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:21:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-11 02:21:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-10-11 02:21:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-11 02:21:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-10-11 02:21:23,383 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 36 [2021-10-11 02:21:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:23,384 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-10-11 02:21:23,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:21:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-10-11 02:21:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-11 02:21:23,384 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:23,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2021-10-11 02:21:23,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-10-11 02:21:23,607 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash -928185916, now seen corresponding path program 2 times [2021-10-11 02:21:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:23,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382153750] [2021-10-11 02:21:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-10-11 02:21:23,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382153750] [2021-10-11 02:21:23,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990348092] [2021-10-11 02:21:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:21:23,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:21:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-10-11 02:21:23,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-10-11 02:21:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049515054] [2021-10-11 02:21:23,991 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:21:23,991 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:23,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:23,992 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:23,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:24,350 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:24,494 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-10-11 02:21:24,938 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-10-11 02:21:24,939 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:24,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:24,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2021-10-11 02:21:24,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850945081] [2021-10-11 02:21:24,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:21:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:21:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:21:24,942 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 13 states. [2021-10-11 02:21:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:25,025 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-10-11 02:21:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:21:25,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2021-10-11 02:21:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:25,026 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:21:25,026 INFO L226 Difference]: Without dead ends: 59 [2021-10-11 02:21:25,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:21:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-11 02:21:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-11 02:21:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-10-11 02:21:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-10-11 02:21:25,029 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 37 [2021-10-11 02:21:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:25,029 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-10-11 02:21:25,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:21:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-10-11 02:21:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-11 02:21:25,030 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:25,030 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 1, 1, 1] [2021-10-11 02:21:25,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:25,255 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash -973914943, now seen corresponding path program 2 times [2021-10-11 02:21:25,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:25,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776982709] [2021-10-11 02:21:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-11 02:21:25,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776982709] [2021-10-11 02:21:25,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649825757] [2021-10-11 02:21:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:25,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:21:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:25,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:21:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-10-11 02:21:25,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-10-11 02:21:30,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:21:30,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 19 [2021-10-11 02:21:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562642428] [2021-10-11 02:21:30,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:21:30,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:30,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:21:30,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:21:30,520 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2021-10-11 02:21:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:30,649 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-11 02:21:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:21:30,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2021-10-11 02:21:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:30,650 INFO L225 Difference]: With dead ends: 58 [2021-10-11 02:21:30,650 INFO L226 Difference]: Without dead ends: 58 [2021-10-11 02:21:30,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:21:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-11 02:21:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-11 02:21:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-10-11 02:21:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-10-11 02:21:30,654 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 42 [2021-10-11 02:21:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:30,655 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-10-11 02:21:30,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:21:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-10-11 02:21:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-11 02:21:30,660 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:30,660 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1] [2021-10-11 02:21:30,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-10-11 02:21:30,875 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:21:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1385066996, now seen corresponding path program 3 times [2021-10-11 02:21:30,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:30,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518435647] [2021-10-11 02:21:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:30,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:31,017 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:31,053 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:21:31,054 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:21:31,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-10-11 02:21:31,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:21:31 BoogieIcfgContainer [2021-10-11 02:21:31,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:21:31,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:21:31,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:21:31,143 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:21:31,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:10" (3/4) ... [2021-10-11 02:21:31,145 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:21:31,219 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f697e714-0479-41f1-a9d0-1cdf53a5af20/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:21:31,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:21:31,221 INFO L168 Benchmark]: Toolchain (without parser) took 21792.00 ms. Allocated memory was 88.1 MB in the beginning and 243.3 MB in the end (delta: 155.2 MB). Free memory was 51.6 MB in the beginning and 121.6 MB in the end (delta: -69.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:31,221 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 67.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:31,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.16 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 51.4 MB in the beginning and 91.7 MB in the end (delta: -40.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:31,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.98 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:31,222 INFO L168 Benchmark]: Boogie Preprocessor took 38.36 ms. Allocated memory is still 115.3 MB. Free memory was 90.3 MB in the beginning and 89.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:31,223 INFO L168 Benchmark]: RCFGBuilder took 513.99 ms. Allocated memory is still 115.3 MB. Free memory was 89.3 MB in the beginning and 67.7 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:31,223 INFO L168 Benchmark]: TraceAbstraction took 20845.69 ms. Allocated memory was 115.3 MB in the beginning and 243.3 MB in the end (delta: 127.9 MB). Free memory was 67.3 MB in the beginning and 124.7 MB in the end (delta: -57.4 MB). Peak memory consumption was 71.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:31,224 INFO L168 Benchmark]: Witness Printer took 76.74 ms. Allocated memory is still 243.3 MB. Free memory was 124.7 MB in the beginning and 121.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:31,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 67.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.16 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 51.4 MB in the beginning and 91.7 MB in the end (delta: -40.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.98 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.36 ms. Allocated memory is still 115.3 MB. Free memory was 90.3 MB in the beginning and 89.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 513.99 ms. Allocated memory is still 115.3 MB. Free memory was 89.3 MB in the beginning and 67.7 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20845.69 ms. Allocated memory was 115.3 MB in the beginning and 243.3 MB in the end (delta: 127.9 MB). Free memory was 67.3 MB in the beginning and 124.7 MB in the end (delta: -57.4 MB). Peak memory consumption was 71.9 MB. Max. memory is 16.1 GB. * Witness Printer took 76.74 ms. Allocated memory is still 243.3 MB. Free memory was 124.7 MB in the beginning and 121.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; [L5] int i = 0; VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND FALSE !(i < 10) [L9] return array; [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND FALSE !(i < 10) [L21] return numbers2; [L21] return numbers2; [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.6s, OverallIterations: 18, TraceHistogramMax: 10, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 163 SDtfs, 367 SDslu, 182 SDs, 0 SdLazy, 664 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 780 GetRequests, 568 SyntacticMatches, 9 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 654 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 817 ConstructedInterpolants, 55 QuantifiedInterpolants, 249082 SizeOfPredicates, 23 NumberOfNonLiveVariables, 918 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 2381/2758 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! Received shutdown request...